Patent Grant
11495334
The present application is a National Phase of International Application No. PCT/EP2016/064392, filed on Jun. 22, 2016, which claims priority to Swedish Patent Application No. 1550885-6, filed on Jun. 25, 2015, the entire contents of each of which are being incorporated herein by reference.
The present disclosure relates generally to computer networks. More specifically, the present disclosure relates to computer networks for medical devices that pump fluids.
Hemodialysis (“HD”) in general uses diffusion to remove waste products from a patient's blood. A diffusive gradient that occurs across the semi-permeable dialyzer between the blood and an electrolyte solution called dialysate causes diffusion. Hemofiltration (“HF”) is an alternative renal replacement therapy that relies on a convective transport of toxins from the patient's blood. This therapy is accomplished by adding substitution or replacement fluid to the extracorporeal circuit during treatment (typically ten to ninety liters of such fluid). The substitution fluid and the fluid accumulated by the patient in between treatments is ultrafiltered over the course of the HF treatment, providing a convective transport mechanism, which is particularly beneficial in removing middle and large molecules (in hemodialysis there is a small amount of waste removed along with the fluid gained between dialysis sessions, however, the solute drag from the removal of that ultrafiltrate is typically not enough to provide convective clearance).
Hemodiafiltration (“HDF”) is a treatment modality that combines convective and diffusive clearances. HDF flows dialysate through a dialyzer, similar to standard hemodialysis, providing diffusive clearance. In addition, substitution solution is provided directly to the extracorporeal circuit, providing convective clearance.
The above modalities are provided by a dialysis machine. The machines can be provided in a center or in a patient's home. Dialysis machines provided in a center are used multiple times a day for multiple patients. Prescription input data is inputted into the dialysis machines before treatment, while treatment output data is collected from the dialysis machines during and after treatment. The data is useful to the clinic to track how the patient's treatment is proceeding over time, so that the treatment can be modified if needed. The data is also useful to see how a particular machine is performing. For example, if the data indicates that a particular machine is alarming for the same reason over multiple treatments with different patients, the clinic may determine that the problem is with the machine, not the patients. The data is also useful as a basis for billing and reimbursement purposes. The data can track how many different drugs or solutions (e.g., heparin or saline) and disposables are consumed over a treatment, so that the clinic can then bill and be reimbursed for the proper amount for the materials consumed.
It is known to install centralized servers that collect treatment data from multiple dialysis machines over multiple treatments. The drawbacks that the central servers present are many. First, the central servers result in significant hardware and installation costs. Second, the central servers require a good deal of computer experience to install and maintain. Many clinics simply do not have the information technology (“IT”) support for the centralized data systems. These drawbacks in many cases result in the clinics not using automated data collection systems and instead collecting the data manually, which is time consuming and error prone. For example, many backend software systems handle dialysis related information, disconnected from the dialysis machines, manually and far from the point of care in both space and time, which is time consuming and prone to failure. It would be advantageous if this and other types of data collection could be performed closer to the machine and the treatment.
A need accordingly exists for an improved data network system for medical devices.
The present disclosure provides a distributed database system and method for medical devices, such as a renal failure therapy system and method that performs hemodialysis (“HD”), hemofiltration (“HF”), hemodiafiltration (“HDF”), peritoneal dialysis (“PD”), isolated UF (“UF”) and continuous renal replacement therapy (“CRRT”), slow continuous ultrafiltration (“SCUF”), continuous veno-venous hemodialysis (“CVVHD”), continuous veno-venous hemofiltration (“CVVH”), and continuous veno-venous hemodiafiltration (“CVVHDF”). Accordingly, “renal failure therapy” as used herein is meant to include any one, or more, or all of HD, HF, HDF, PD, UF, and CRRT (including SCUF, CVVHD, CVVH, and CVVHDF versions of CRRT). The present disclosure focuses primarily on renal failure therapy systems but is not limited to them. The network system and method described herein applies to other medical devices, such as, drug delivery pumps (including intravenous (“IV”) pumps, syringe pumps, large volume pumps (“LVP's”), shuttle pumps, peristaltic IV pumps, and any combination thereof, for example), and apheresis machines.
In one primary embodiment, the distributed database system of the present disclosure includes a local area network (“LAN”) formed between multiple renal failure therapy machines located in a clinic or other group setting or cluster, wherein the distributed database system does not need to interface with a centralized server, database, backbone network, or wide area network (“WAN”) of the clinic. Indeed, the network of the distributed database system can be the backbone network of the clinic. The distributed database system is stand-alone and all of the functionality to host the system can be provided within each dialysis machine. Each renal failure therapy machine has a control processor that operates with a memory device, which in turn communicates with the distributed database system via cable or wirelessly.
It should be appreciated that while one primary embodiment of the distributed database system uses a LAN having a network router, it is not necessary for the LAN to use such a router. Instead, the LAN could alternatively be a different type of network, such as an ad-hoc network or a power line network. As used herein, LAN includes network router types, Ethernet types, wireless types, ad-hoc types, power line types, others known to those of skill, others developed in the future, and combinations thereof.
The machines of the distributed database system can each access the same medically related data in one embodiment, where medically related data includes but is not limited to (i) prescription input parameters or data (e.g., machine operating parameters), (ii) treatment output data (e.g., UF removed, total blood volume moved, total dialysis fluid volume consumed, heparin volume consumed, alarms, and treatment effectiveness measurements Kt/V, etc.), (iii) technical input data (e.g., calibrations, alarm limits, etc.), (iv) technical output data (e.g., actual component usage, sensor measurements, etc.), and (v) administrative data (e.g., inventory data and staffing data). In general, data (i) and (ii) are helpful to evaluate a patient's treatment over time, while data (iii) and (iv) are helpful to evaluate how a particular machine is performing. Data (v) helps the clinic to run smoothly and efficiently.
Prescription input parameters can also include any and all fluid flowrate, pressure alarm limits, volume, temperature, conductivity, dose, treatment time, etc., settings used during the one or more treatments performed on any machine of the distributed database system. Prescription input parameters can further include any drugs that the patient is supposed to take and any supplies that the patient is supposed to use in connection with treatment, e.g., any medical delivery drug, anticoagulant such as heparin, saline, Erythropoietin stimulating agent (“ESA”) such as Epogen™, iron supplements, potassium supplements, bicarbonate used, acid concentrate used, dialyzer used, etc.
Treatment output data can also be any and all sensed or recorded data, e.g., actual fluid flowrate, pressure, treatment fluid volume, temperature conductivity, dialysis or drug delivery dose, treatment time, UF volume, etc., actually achieved during a treatment performed on a machine of the distributed database system. Treatment output data can further include any alarms or alerts generated during the treatment. Still further, treatment output data can include any physiological data, such as blood pressure, patient temperature, patient weight, patient glucose level, as well as subjective feelings such as nauseousness, light-headedness, sleepiness, etc., recorded during the treatment (including any physiological data sensed by the machine (e.g., a dialysis or drug delivery machine) or at one or more remote sensing equipment).
Each machine can broadcast medically related data to the other machines on the distributed database system. And as discussed below, an operator can use any machine of the distributed database system to obtain information regarding any patient of the clinic and the status of any other machine. It should be appreciated however that each machine of distributed database system does not have to have access to all the data of the system, or to the same data as each other machine, allowing for the machines or groups of the machines to instead have access to less than all the medically related data of the system.
The the distributed database system uses the fact that even very large amounts of memory storage are relatively inexpensive. The the distributed database system accordingly copies at least part of data of the machines on some periodic basis, or in real time, such that each machine has the same, or virtually the same, data stored in its memory device. If in real time, the distributed database system may be limited to distributing only certain types of data so that ongoing treatments are not interrupted. For example, the machines may be limited to only distributing alarm information so that a nurse attending to a patient at a first machine can see at the first machine that an alarm is occurring at a second machine. In the example, the machines can later, after the treatments are completed, exchange their bulk treatment output data.
Real time data sharing is alternatively more extensive, such that a nurse or clinician at a first machine can obtain treatment data concerning other machines of the distributed database system. For example, it is contemplated to provide a clinician's summary screen that allows a clinician to quickly view the status of all ongoing treatments. For example, a main treatment screen of the medical device can provide a “clinic summary” button that when pressed takes the clinician to the clinician's summary screen. Once at that screen, the clinician can quickly see real time or the current day's information about each other machine of the distributed database system, such as, current state of the machine (e.g., running, paused, under alarm condition, or not in use), elapsed treatment time, time of treatment remaining, amount of UF collected, and alarm history, and the like.
The system can provide multiple summary screens. For example, a main treatment screen of the medical device can provide a “summary” button, which when pressed leads the user to a screen having multiple summary buttons, such as the “clinic summary” button, a “patient summary” button, a “stock keeping summary” button, a “staffing summary” button, for example. The “patient summary” button when pressed could lead to a list of patients (for all of the clinic or only those currently undergoing treatment), wherein pressing any patient name on the list leads to a screen dedicated to that patient. Thus the nurse or clinician can reach a dedicated patient screen from any machine in the distributed database system. The “stock keeping summary” button when pressed could lead to a stock summary screen listing supply names, how many of each is supply in stock and how many of each supply is on back order. The “staffing summary” button when pressed could lead to a “staffing summary” screen listing all clinicians, nurses and doctors associated with the clinic, and which ones are currently at the clinic, their shift times, their technical specialties, and the like.
The “stock summary” and “staffing summary” screens are good examples of how different machines or other equipment connected to the distributed database system do not all have to share the same data. Here, one or more backend computer may be used to update the stock summary and/or the staffing summary information, e.g., at the end of each day. The one or more backend computer can share its updated stock summary and/or staffing summary information with each machine of the distributed database system, however, the one or more backend computer does not need to have access to the other types of medically related data listed above, which is provided to and received from the machines.
The summary information may or may not be real time information. For example, the clinician summary screen may involve real time data transfer, e.g., of treatment output data for different patients being treated on the machines employing the distributed database system. Stock summary information on the other hand can be current but not necessarily up to the minute information. For example, the information is in one embodiment not updated immediately as a dialyzer is pulled from inventory, but updated instead at the end of the day, where the total number of dialyzers used during that day are subtracted from inventory.
In one embodiment, a user such as a nurse or clinician must enter identification to be authenticated and receive authorization to review any information of the distributed databases of the present disclosure, including the summary information just described. For example, the summary screens discussed above when selected first present user identification and password entry boxes. Only after entry of an authorized username and password can the requesting nurse or clinician see patient identifiable data.
In one embodiment, the renal failure therapy machines are of a plug-and-play type, so that the machines can connect to the distributed database system automatically and share data on the system without any (or very little) user setup or configuration. Besides sharing treatment data, the distributed database system of the present disclosure also shares or makes sure that each machine has and operates with the latest software. If a software update is provided on one of the machines, the machine if allowed by the clinic will be able to propagate the software update to all machines of the distributed database system. In an embodiment, software updates are performed at the end of the day while the machines are not performing treatment. In many cases, the machines at the end of the day go into a dormant, sleep, hibernation or offline mode or state (“hibernation state”). The machine with the software update will awaken any machines in the hibernation state, so that all machines of the distributed database system or cluster can receive the software updates.
In certain instances, a renal failure therapy machine of the distributed database system may be disconnected from the system, e.g., for mechanical service or updating, cleaning, etc. In such a case, when the disconnected machine is placed back online with the distributed database system, the machine is updated to store any missing operating software and treatment data, so that the machine is fully up to date with the other machines of the distributed database system or cluster.
The distributed database system may include machines of only a single type or manufacturer. Alternatively, the distributed database system or cluster can include medical devices of different types and/or manufacturers. For example, the distributed database system or cluster can include renal failure therapy machines provided by manufacturer X, Y, and Z. It is contemplated that adapters, intermediate computers or interfaces be provided so that machines provided by manufacturers Y and Z can (i) communicate with each other, and (ii) communicate with the machine of manufacturer X. The adapters, intermediate computers or interfaces also ensure that the machines of each of manufacturers X, Y, and Z have adequate processing and memory to receive the data updating discussed herein.
There are various fundamental modes contemplated for the machines of the distributed database system to share data. In a first fundamental mode, the machines “push” their newly acquired data out to the other machines. Here, the machines can take turns sending their data to the other machines of the distributed database system. In particular, the machines in one “push” embodiment take turns sending their patient or treatment data at the end of a designated time period, such as at the end of every second, minute, hour, shift or treatment day. For example, each machine of the distributed database system may be given a queue number, e.g., 1/10, 2/10, 3/10 . . . 10/10, assuming that there are ten machines in the distributed database system. When it comes time for the machines to share data, machine 1/10 sends its data to machines 2/10 to 10/10. When machine 1/10 is complete, machine 2/10 sends its data to machines 1/10, and 3/10 to 10/10, and so on until machine 10/10 sends its data to machines 1/10 to 9/10. In the end, all ten machines have the data from every other machine of the cluster.
In another “push” embodiment, one of the machines acts as a hub machine, while other machines of the distributed database system act as spokes. Here, one or more machine of the cluster, e.g., machine 1/10 receives the data from all other machines 2/10 to 10/10. Machines 2/10 to 10/10 can each send their respective data according to a sequence requested by hub machine 1/10. Hub machine 1/10 will then store the data from machines 2/10 to 10/10 in the order in which the data is sent to hub machine 1/10. Once hub machine 1/10 is fully updated with the data from all the other machines of the distributed database system or cluster, machine 1/10 sends out the totalled data, including machine 1/10's data to all other machines 2/10 to 10/10 in the distributed database system or cluster, which can again be according to a sequence requested by hub machine 1/10. Again, in the end, all ten machines should have the data from every other machine of the distributed database system.
Another fundamental mode in which the machines of the distributed database system share data is for each machine to “pull” any new data from all other machines of the system. Here, as opposed to pushing data, each machine of the distributed database system asks each other machine of the system whether it has any new data to deliver. To do so, the requesting machine can keep a record of which data each other machine has sent. The requesting machine tells the delivering machine which of the delivering machine's data has already been delivered. The delivering machine then looks to see if there is any additional data, and if so, the delivering machine delivers the new data to the requesting machine. Each machine of the distributed database system takes turns being the requesting machine, so that at the end of an exchange session, each machine is fully updated.
In a further fundamental mode, the machines can perform a “push-pull” routine to ensure that they share the same data. For example, a “push” routine can be performed to push new data out from each of the machines to each of the other machines of the distributed database system. The push can be performed for example when the new data is created or at a designated interval, e.g., once a day or shift. A “pull” routine can be used to compare the stored data of any two machines to make sure that they match. For example, when a machine comes back online to the distributed database system, it can perform a “pull” routine to capture any new data generated while offline by the other machines of the systems. “Pull” routines can also be performed periodically, e.g., daily or per shift. In a “pull” routine, two machines compare and pull data from each other and select the most recent data to make sure that the two machines in the end have the same most recent data. This “pull” routine takes place on some periodic basis between all pairs of the machines of the distributed database system. The premise here is that if all pairs of machines of a distributed database have the same data, then all machines of distributed database have the same data.
The “push” and the “push-pull” routines can be implemented in many different ways. For example, the “push” can be an accumulated push. Say, for example, that the distributed database system includes twelve machines, 1/12 to 12/12. If each machine does its own individual new data push, then there will be 11 pushes per machine multiplied by 12 machines, totalling 132 pushes. In another embodiment, each machine has a partner, say machines 1/12+2/12, 3/12+4/12, 5/12+6/12, 7/12+8/12, 9/12+10/12, and 11/12+12/12, creating six machine couples. Each couple requires twelve new data pushes, two individual pushes to each other, plus 10 more collective data pushes to each of the other machines outside the couple. Here, twelve data pushes per couple multiplied by six couples equals only 72 total data pushes. In a further embodiment, each machine works in a trio, say machines 1/12+2/12+3/12, 4/12+512+6/12, 7/12+8/12+9/12, and 10/12+11/12+12/12, creating four total trios. Each trio requires fifteen new data pushes, six individual pushes to each other, plus 9 more collective data pushes to each machine outside the trio. Here, fifteen data pushes per trio multiplied by four trios equals only 60 total data pushes. In this same manner, grouping the same twelve machines into three quartets again yields 60 total new data pushes (twenty new data pushes per quartet multiplied by three quartets). Interestingly, grouping the same twelve machines into two halves results in 72 total new data pushes (36 new data pushes per half multiplied by two halves). Thus, there may be an optimum one or more grouping (in terms of lesser data pushes being better) for any total number of machines in the distributed database.
To keep track of which data has been delivered, it is contemplated to assign the data, or a packet of data, with tag data or metadata. In an embodiment, the tag data or metadata includes a unique identifier (“id”), a hash sum, and a time stamp. The unique id identifies the particular machine and the sequence in the machine that a particular piece of new data (usually an array of data) is generated. The hash sum identifies or represents the actual content of the new data (e.g., array). The time stamp marks the time at which the new data was generated. When two machines are synchronized, the machines first look to see if they have each of each other's unique id's. If a unique identifier of machine X is missing in machine Y, the corresponding new data and all metadata are copied to machine Y, and vice versa. If any two unique id's match but the corresponding hash sums are different, then the hash sum with the most recent time stamp is selected for storage in each machine X and Y. In this manner if machine Y is taken offline or has been permanently hibernating for a number of days, machine Y upon returning can go through a synchronization procedure with each other machine of the distributed database system to retrieve any missing new data generated during the time that machine Y has been offline.
Discussed herein are methods for the machines of the distributed database system to periodically check the integrity of their shared data and to correct the data if it becomes corrupted. Similarly, methods are discussed herein for checking whether data has been transferred correctly from one machine to another. In both cases, the checking can be done via the comparison of hash sums calculated for one or more pieces of data.
In any of the embodiments discussed herein, the renal therapy machines or other types of medical machines of the distributed database system can send data and status information within or outside of the LAN for storage at a remote computer or network of the clinic, machine manufacturer or other desired entity. For example, the data can be remotely stored for the purposes of backup in case the LAN or other portion of the distributed database is damaged. The data can be archived remotely for analysis, e.g., for averaging, trending, supply chain analysis, or supply ordering analysis. The data can also be archived remotely to lessen or alleviate the data storage burden to the distributed database system. That is, it is contemplated for data that is over a certain age to be incorporated into ongoing trends kept for each patient on the distributed database system, archived remotely on a computer or network within or outside the LAN, and purged eventually from the machines of the distributed database system to free storage space for new patient data.
The distributed database system also supports connectivity to sensing equipment, such as sensors, monitors, analysers, other medical instruments, and lab equipment. For example, a weight scale provided in the clinic can be used to weigh each patient prior to and after treatment. Patient weight can be sent to each machine of the distributed database system, e.g., wired or wirelessly, because each machine keeps a record of the patient being weighed. Alternatively, patient weight can be sent, e.g., wirelessly, to the machine on which the patient is being treated that day, and then sent later after treatment from the specific machine to each machine of the distributed database system. Or, the patient weight can be stored on a data storage device, e.g., a flash drive, taken to the machine on which the patient is being treated that day, and then sent later after treatment from the specific machine to each machine of the distributed database system. Data from other sensors, such as, blood pressure measurement devices and glucose sensors can be recorded and distributed in the same way.
The distributed database system can also monitor the performance of the sensors, monitors, analysers, other medical instruments, and lab equipment and report if it appears that any of these appear to be giving false readings. For example, the system can have a backend computer that runs an algorithm analysing the data from each sensor, monitor, analyser, or other medical instrument. The algorithm can look for trends in the readings from the sensor, monitor, etc., for example, to look for sensing equipment that is tending to read patients higher or lower than normal. If such a piece of sensing equipment is identified, the backend computer sends a flag to each machine of the distributed database system, notifying the machines to either not accept readings from such sensing equipment and/or to flag a clinician to have the equipment recalibrated or replaced. It should therefore be appreciated that if a particular clinic uses two or more scales (or other sensors), the data sent from each scale or sensor can have an identifier identifying that piece of sensing equipment. Moreover, it is contemplated that if the system finds an improperly working piece of sensing equipment, e.g., weight scale or blood pressure module, the system can be programmed to look back to see if there has been similar corrupt data in the past from the particular piece of equipment. In any case, it is contemplated to connect any sensing equipment to the distributed database system of the present disclosure, so as to share data along with the medical fluid pumping deliveries.
A backend computer has been mentioned multiple times thus far. It is contemplated in an alternative embodiment for any one or more backend computer to be eliminated and its function to be performed instead in one or more of the medical machines of the distributed database system. For example, the functionality performed by the one or more backend computer used to update the stock summary and/or the staffing summary information discussed above, or the backend computer for the sensing equipment, may be provided instead by the processing and memory of one or more (or all) medical machines of the distributed database system. In this way, clinics with limited or no backend computing can enjoy the benefits described in connection with these backend computers. But, clinics that do have such backend computing can leverage such computing into the distributed database of the present disclosure. It is contemplated that the distributed database system of the present disclosure can operate (i) without any backend computing capability, (ii) with and compliment existing backend computing capability, or (iii) independently from existing backend computing capability.
The distributed database system also supports data transmission from its renal failure therapy or other medical machines to a mobile device or personal computer of a clinician, doctor, nurse or other authorized person. In an embodiment, a record of any transmission to an external mobile device or personal computer is maintained. In one embodiment, data stored in the distributed database system can be accessed (read) on a mobile device or remote personal computer, but not stored on the mobile device or remote personal computer, or transferred from those devices.
In light of the technical features set forth herein, and without limitation, in a first aspect, a medical device system includes: a distributed database; a plurality of medical devices operating with the distributed database; and a logic implementer associated with each medical device, wherein each logic implementer is programmed to access the distributed database, so that each medical device of system periodically (i) delivers at least one of prescription input parameters or treatment output data to and (ii) retrieves at least one of prescription input parameters or treatment output data from each of the other medical devices.
In a second aspect, which may be used with any other aspect described herein unless specified otherwise, the medical devices are in data communication with each other via a local area network (“LAN”) used in connection with the distributed database.
In a third aspect, which may be used with any other aspect described herein unless specified otherwise, each of the medical devices is updated to store the same at least one of the prescription input parameters or treatment output data for each of a plurality of patients.
In a fourth aspect, which may be used with any other aspect described herein unless specified otherwise, the medical devices and the distributed database do not interact with a centralized server.
In a fifth aspect, which may be used with any other aspect described herein unless specified otherwise, the medical devices are provided by first and second manufacturers, and which includes an interface enabling the medical devices of the first and second manufacturers to communicate with one another.
In a sixth aspect, which may be used with any other aspect described herein unless specified otherwise, at least one of the (i) prescription input parameters or (ii) treatment output data is shared via the distributed database along with at least one other of (iii) technical input data, (iv) technical output data, or (v) administrative data.
In a seventh aspect, which may be used with any other aspect described herein unless specified otherwise, the distributed database also shares information from at least one medical equipment selected from the group consisting of: a weight scale, a blood pressure measurement device, a glucose sensor, a physiological sensor, an electrocardiogram device, water treatment equipment, a bed scale, an access disconnection device, a bioimpedance measurement device, a pH sensor, lab testing equipment, a blood sample analyzer, or an access flow measurement device.
In an eighth aspect, which may be used with any other aspect described herein unless specified otherwise, the distributed database is a first distributed database, and which includes a second distributed database that shares information from at least one medical equipment selected from the group consisting of: a weight scale, a blood pressure cuff, a glucose sensor, a physiological sensor, an electrocardiogram device, water treatment equipment, a bed scale, an access disconnection device, a bioimpedance measurement device, a pH sensor, lab testing equipment, a blood sample analyzer, or an access flow measurement device.
In a ninth aspect, which may be used with any other aspect described herein unless specified otherwise, periodically delivering and retrieving prescription input parameters or treatment output data includes doing so in at least one of: real time, a matter of seconds, a matter of minutes, hourly, daily, weekly, monthly, at an end of a treatment, at an end of a treatment day, or at an end of a treatment shift.
In a tenth aspect, which may be used with any other aspect described herein unless specified otherwise, at least one of the logic implementers is configured to periodically push at least one of the prescription input parameters or the treatment output data to each of the other medical devices of system.
In an eleventh aspect, which may be used with any other aspect described herein unless specified otherwise, at least one of the logic implementers is configured to periodically pull at least one of the prescription input parameters or the treatment output data from each of the other medical devices of system.
In a twelfth aspect, which may be used with any other aspect described herein unless specified otherwise, the system is further configured to share operating software between the medical devices via the distributed database.
In a thirteenth aspect, which may be used with any other aspect described herein unless specified otherwise, the distributed database is a first distributed database, and which includes a second distributed database, wherein at the logic implementer of at least one of the plurality of machines is programmed to access the second distributed database.
In a fourteenth aspect, which may be used with the thirteenth aspect in combination with any other aspect described herein unless specified otherwise, wherein one of the distributed databases is a real time data database.
In a fifteenth aspect, which may be used with the thirteenth aspect in combination with any other aspect described herein unless specified otherwise, one of the distributed databases is an administrative data database.
In a sixteenth aspect, which may be used with any other aspect described herein unless specified otherwise, each medical device of system is programmed to periodically verify its at least one prescription input parameters or treatment output data.
In a seventeenth aspect, which may be used with the sixteenth aspect in combination with any other aspect described herein unless specified otherwise, wherein verification is performed via a comparison of hash sums.
In an eighteenth aspect, which may be used with any other aspect described herein unless specified otherwise, the plurality of medical devices of system are programmed to periodically synchronize their at least one prescription input parameters or treatment output data.
In a nineteenth aspect, which may be used with the eighteenth aspect in combination with any other aspect described herein unless specified otherwise, synchronization is performed via a comparison of at least one of record identifications, hash sums, or time stamps.
In a twentieth aspect, which may be used with any other aspect described herein unless specified otherwise, at least one of the medical devices of system is programmed to display at least one summary screen showing at least one of the prescription input parameters or treatment output data for different medical devices of system.
In a twenty-first aspect, which may be used with any other aspect described herein unless specified otherwise, a medical device system includes: a plurality of medical devices; a first distributed database sharing first data generated or used by the plurality of medical devices amongst the plurality of medical devices; and a second distributed database sharing second data generated or used by the plurality of medical devices amongst the plurality of medical devices, (ii) second data generated or used by a second plurality of medical devices amongst the second plurality of medical devices, or (iii) second data generated or used by medical equipment.
In a twenty-second aspect, which may be used with the twenty-first aspect in combination with any other aspect described herein unless specified otherwise, one of the first medical devices and one of the second medical devices are configured to provide treatment to a same patient.
In a twenty-third aspect, which may be used with the twenty-first aspect in combination with any other aspect described herein unless specified otherwise, one of the first medical devices and one of the medical equipment are configured to provide treatment to a same patient.
In a twenty-fourth aspect, which may be used with the twenty-first aspect in combination with any other aspect described herein unless specified otherwise, the first medical devices are for providing treatment to a first group of patients and the second medical devices are for providing treatment to a second group of patients.
In a twenty-fifth aspect, which may be used with any other aspect described herein unless specified otherwise, a medical device includes: at least one medical fluid pump; and a logic implementer operating the at least one medical fluid pump so as to accept a pump input parameter and generate pump output data, the logic implementer programmed to (i) periodically share at least one of the pump input parameter or the pump output data with a plurality of other medical devices via a distributed database, and (ii) periodically receive at least one of a pump input parameter or pump output data from the plurality of other medical devices via the distributed database.
In a twenty-sixth aspect, which may be used with the twenty-fifth aspect in combination with any other aspect described herein unless specified otherwise, the logic implementer is programmed to synchronize at least one of the pump input parameter or the pump output data with the other medical devices via the distributed database.
In a twenty-seventh aspect, which may be used with the twenty-sixth aspect in combination with any other aspect described herein unless specified otherwise, the logic implementer is programmed to compare its own hash sum with a corresponding hash sum of one of the other medical devices to synchronize at least one of the pump input parameter or the pump output data with that other medical device.
In a twenty-eighth aspect, which may be used with the twenty-fifth aspect in combination with any other aspect described herein unless specified otherwise, the logic implementer is programmed to send a hash sum for at least one of the pump input parameter or the pump output data to one of the other medical devices for comparison at the other medical device with a corresponding hash sum of the other medical device.
In a twenty-ninth aspect, which may be used with the twenty-fifth aspect in combination with any other aspect described herein unless specified otherwise, the logic implementer is programmed to verify at least one of its pump input parameter or pump output data.
In a thirtieth aspect, which may be used with the twenty-ninth aspect in combination with any other aspect described herein unless specified otherwise, verification includes comparing a newly calculated hash sum with a previously established hash sum for at least one of the pump input parameter or the pump output data.
In a thirty-first aspect, which may be used with the second aspect in combination with any other aspect described herein unless specified otherwise, the LAN includes a network router.
In a thirty-second aspect, which may be used with the second aspect in combination with any other aspect described herein unless specified otherwise, the LAN is wired or wireless.
In a thirty-third aspect, which may be used with any other aspect described herein unless specified otherwise, the system of device is configured to create at least one treatment record trend from the medically related data.
In a thirty-fourth aspect, which may be used with any other aspect described herein unless specified otherwise, the system or device is configured to remove data at or after a certain age or for a regulatory reason.
In a thirty-fifth aspect, which may be used with any other aspect described herein unless specified otherwise, the system or device is which is configured to deliver the medically related data after each of the medical devices has completed treatment.
In a thirty-sixth aspect, which may be used with any other aspect described herein unless specified otherwise, the system or device is configured to deliver medically related data during treatment.
In a thirty-seventh aspect, which may be used with any other aspect described herein unless specified otherwise, the system or device is configured to awaken at least one of the medical devices from a hibernation mode for medically related data delivery.
In a thirty-eighth aspect, which may be used with any other aspect described herein unless specified otherwise, the system or device is configured to deliver multiple days of medically related data to one of the medical devices upon its returning to data communication with the other medical devices.
In a thirty-ninth aspect, which may be used with any other aspect described herein unless specified otherwise, the system or device is configured to update each medical device automatically with new software.
In a fortieth aspect, which may be used with any other aspect described herein unless specified otherwise, the system a medical device system includes: a plurality of medical devices in data communication with each other; and a logic implementer associated with each medical device, wherein each logic implementer is programmed to periodically store medically related data for each of a plurality of patients treated via the plurality of medical devices.
In a forty-first aspect, which may be used with any other aspect described herein unless specified otherwise, a medical device distributed database system includes: a local area network (“LAN”); and a plurality of medical devices in data communication with the LAN, wherein each of the plurality of medical devices periodically takes turns transferring medically related data via the LAN to each of the other medical devices.
In a forty-second aspect, which may be used with the forty-first aspect in combination with any other aspect described herein, each of the plurality of medical devices includes a place in a queue dictating an order in which the plurality of medical devices takes turns transferring medically related data.
In a forty-third aspect, which may be used with the forty-second aspect in combination with any other aspect described herein, the first medical device in the queue initiates the periodic transferring of data.
In a forty-fourth aspect, which may be used with the forty-first aspect in combination with any other aspect described herein, the transferring of data occurs after each day of treatment with the medical devices.
In a forty-fifth aspect, which may be used with the forty-first aspect in combination with any other aspect described herein, the transferring of data occurs during treatment with the medical devices.
In a forty-sixth aspect, which may be used with any other aspect described herein unless specified otherwise, a medical device distributed database system includes: a local area network (“LAN”); and a plurality of medical devices in data communication with the LAN, wherein a first one of the plurality of medical devices is programmed to periodically receive medically related data via the LAN from each of the other of the medical devices, and send the collective medically related data via the LAN to each of the other medical devices.
In a forty-seventh aspect, which may be used with the forty-sixth aspect in combination with any other aspect described herein, each of the other medical devices sends its data upon receiving a notice from the first medical device.
In a forty-eighth aspect, which may be used with the twenty-fifth aspect in combination with any other aspect described herein unless specified otherwise, the logic implementer is further programmed to share at least one of the pump input parameter or the pump output data with at least one of a personal communication device (“POD”, 175), a personal computer (170), a server computer (180), or medical equipment (185) via the distributed database (10a to 10f).
In a forty-ninth aspect, which may be used with the twenty-fifth aspect in combination with any other aspect described herein unless specified otherwise, the logic implementer is further programmed to receive data from at least one of a personal communication device (“PCD”, 175), a personal computer (170), a server computer (180), or medical equipment (185) via the distributed database (10a to 10f).
In a fiftieth aspect, any of the features, functionality and alternatives described in connection with any one or more of
It is therefore an advantage of the present disclosure to provide a distributed database system and method for medical devices, which does not require a centralized server.
It is another advantage of the present disclosure to provide a distributed database system and method for medical devices, which enables any patient to use any machine of the system, wherein each machine will have a record of the patient.
It is a further advantage of the present disclosure to provide a distributed database system and method for medical devices, in which a clinician may approach any machine and obtain data about any patient within the distributed database system.
Moreover, it is an advantage of the present disclosure to provide a distributed database system and method for medical devices, which can handle different types and manufacturers of medical devices.
Additional features and advantages of the present invention are described in, and will be apparent from, the following Detailed Description of the Invention and the figures.
Referring now to the drawings and in particular to
While distributed database system 10 is shown in
Distributed database system 10 in one embodiment operates using a local area network (“LAN”) 150. LAN 150 of system 10 ties together the cluster of machines 12a to 12j. Distributed database system 10 can include more or less than the illustrated ten machines. Distributed database system 10 does not require a server computer, an outside network, an intranet or an internet. Distributed database system 10 can be completely self-standing and located in areas with little or no internet capability and in facilities with little or no computer infrastructure. LAN 150 of distributed database system 10 connects to machines in a wired or wireless manner.
In an alternative embodiment, LAN 150 is wireless. Here, each machine 12a to 12j is provided with a wireless transceiver 154, which (i) broadcasts information wirelessly to other machines of distributed database system 10 along LAN 150 and (ii) receives information wirelessly from other machines of the distributed database system 10 along LAN 150. The wireless network can be implemented as a Wi-Fi network, e.g., as set forth in standard IEEE 802.11. Any one of a variety of different Wi-Fi protocols can be used, e.g., type “a”, “b”, “g”, “n”, “ac” and other coming protocols, such as “af”. Alternatively, protocols different from Wi-Fi may be used, such as Bluetooth or ZigBee.
In the example of
Different machine 12e illustrates one solution to the above-described manufacturer or machine type mismatch. An adapter, intermediate computer, or interface 160 is provided with different machine 12e. Here, LAN 150 is connected to intermediate interface 160 via wired connection 152 or wireless transceiver 154. A separate data line 156 and wired connection 158 can be made between intermediate interface 160 and machine 12e. Or, a separate wireless connection between transceivers 154 of machine 12e and intermediate interface 160 can be made to enable machine 12e to be in data communication with the other machines via LAN 150 indirectly.
Intermediate interface 160 may be provided with its own video screen 162, e.g., touch screen or onscreen touch keypad, and/or have its own electromechanical keyboard (not illustrated). Alternatively, intermediate interface 160 may simply be a data converter, wherein the user interacts with intermediate interface 160 via the user controls and video screen of different machine 12e (e.g., different manufacturer. While intermediate interface 160 is illustrated as a separate unit located in conjunction with the machine for which it operates, intermediate interface 160 is alternatively (i) one or more printed circuit board located within different machine 12e, (ii) one or more printed circuit board located within any of machines 12a to 12d, or 12f to 12j, or (iii) software loaded on a separate server 180 or computer 170 illustrated below in connection with
In any of the configurations for intermediate interface 160, it is contemplated that the interface have its own data storage capabilities, so that the interface can store some or all of the information distributed amongst the machines of distributed database system 10. In an embodiment, a backend computer 170 (
Intermediate interface 160 enables different machine 12e to operate normally but in the eyes of system 10 as it were of the same type (e.g., same manufacturer or same model) as machines 12a to 12d and 12f to 12j. Intermediate interface 160 enables the data sent from distributed database system 10 for different machine 12e to be the same as the data sent from system 10 to machines 12a to 12d and 12f to 12j, and the data sent from different machine 12e to be provided in the same format within LAN 150 as the data sent from machines 12a to 12d and 12f to 12j.
As discussed above, LAN 150 of system 10 ties together the cluster of machines 12a to 12j.
Referring now to
For example, machines 12 for clinic 130a can be infusion pumps. Machines 12 for clinic 130b can be hemodialysis machines that communicate via LAN 150a and peritoneal dialysis machines that communicate via LAN 150b. Machines 12 for clinic 130c can be hemodialysis machines. Three clinics 130a to 130c are merely an example; there can be more or less than three clinics operating with distributed database system 10.
Clinic 130a is outfitted with a distributed database 10a operating with a single LAN 150 to coordinate multiple machines 12 in a manner and including any of the alternatives discussed herein. LAN 150 of distributed database 10a is also connected to multiple personal computers 170 located within the LAN. Personal computers 170 enable doctors, clinicians, nurses, service people, etc., to (i) view information on distributed database 10a, (ii) input, and/or (iii) store information to the database, before, during and after treatment.
LAN 150 of distributed database 10a of clinic 130a is also connected to one or more server computer 180. Server computer 180 in an embodiment serves as a backup to the information stored on machines 12. As discussed in more detail below, machines 12 of distributed database 10a are periodically updated so that they have one mind, or the same mind, meaning each machine 12 is updated so that all machines 12 store the same data. Thus, each machine 12a to 12j serves as a backup to each of the other machines 12. Nevertheless, server 180 can be provided as additional protection in case each machine 12a to 12j of distributed database 10a is somehow damaged. Server 180 can also store older data that may be removed from machines 12 communicating via LAN 150 of distributed database 10a. For instance, distributed database 10a may be programmed such that each machine 12a to 12j stores six months or one year's worth of data for the patients associated with clinic 130a. Data older than the time limit are purged from the memories of machines 12a to 12j. Server 180 however can retain the older data in case it is needed for some reason. Server 180 of system 10 can alternatively or additionally manage information that is not part of the data shared between machines 12a to 12j. Server 180 can also be responsible for interfaces external to clinic 130c.
As discussed below in connection with
Central hub 190 can communicate wired or wirelessly with any one or more server computer 180 (180a, 180b) within a clinic, as illustrated in each of clinics 130a to 130c. Alternatively or additionally, central hub 190 can communicate wired or wirelessly directly with any one or more LAN 150 within a clinic, as illustrated in clinic 130a. Central hub 190 in the illustrated embodiment has its own server computer 180, which connects to the WAN or internet via a wireless or wired internet connection 182. Central hub 190 can be an additional data backup to the servers 180 of dialysis centers 130a to 130c. Central hub 190 can alternatively or additionally track data trends and averages across multiple dialysis centers or medical clinics 130a to 130c. Central hub 190 can also perform other duties, such as inventory tracking and fulfillment. It is accordingly contemplated that central hub 190 can be part of or work in cooperation with a factory associated with the manufacturer of machines 12 and its related supplies. It is further contemplated to bypass server 180 and allow machines 12 of system 10 to communicate directly with hub 190 for stock balance information (e.g., dialyzers, ultrafilters, concentrates, disinfection fluids, blood sets, etc.), billing or economic transaction information, and/or lab data regarding different patients (e.g., bicarbonate, potassium levels, etc.).
Clinic or dialysis center 130b is outfitted with two or more distributed databases 10b and 10c that operate respectively with two or more LANs 150a and 150b, located within the same clinic or dialysis center. In the example given above, machines 12 located within clinic 130b can be hemodialysis machines communicating via LAN 150a of distributed database 10b and peritoneal dialysis machines communicating via LAN 150b of distributed database 10c. In another example, machines 12 located within clinic 130b can be hemodialysis machines of a first manufacturer communicating via LAN 150a of distributed database 10b and hemodialysis machines of a second manufacturer communicating via LAN 150b of distributed database 10c. In a further example, machines 12 located within clinic 130b can be first medical delivery pumps communicating via LAN 150a of distributed database 10b and second medical delivery pumps communicating via LAN 150b of distributed database 10c. The separate LAN's 150a and 150b of distributed databases 10b and 10c, in general, group machines having common input parameters and output data. LAN's 150a and 150b of distributed databases 10b and 10c may also be separated based upon geographical location, for example, LAN's 150a and 150b may each operate with the same types of machines 12 but be separated because they are located at different rooms or areas of clinic 130b.
PCD's 175 communicate with servers 180 (180a, 180b), central hub 190, personal computers 170, other PCD's, and possibly directly with machines 12 over the WAN or internet using mobile internet connections (such as UTMS, CDMA, HSPA or LTE) or satellite protocols as is known to those of skill in the art. PCD's 175 can be carried by doctors, clinicians, nurses (e.g., for inside or outside of clinics or dialysis centers 130a to 130c. Patients may also use PCD's 175, e.g., during treatment to (i) provide feedback concerning their current treatment or history, (ii) self-assessment, and/or (iii) ask a question to the nurse or clinician to answer either during a current treatment or for a subsequent treatment.
Access to data stored at machines 12 of distributed databases 10b and 10c via PCD's 175 and personal computers 170 can be password protected. It is also contemplated to separate data stored at machines 12 of distributed databases 10b and 10c into patient-identified data and patent de-identified data and to restrict access to any patient-identified data. For example, patient-identified data may be restricted to doctors, nurses or clinicians located within a clinic 130a to 130c and who are associated with a particular LAN 150 of a distributed database 10a to 10d. De-identified data on the other hand may be available to people located outside of clinics 130a to 130c, e.g., marketing people associated with the clinics or with the manufacturing of machines 12 and their supplies, staff responsible for technical services, and manufacturers of machines 12 for monitoring how the machines are performing and/or implementing preventive updates. The above-mentioned staff and employees associated with the manufacturer may be located at central hub 190 for example.
Even amongst the categories of patient-identified data and patient de-identified data, it is contemplated for distributed database system 10 to restrict data access levels within the categories. For example, under the category of patient-identified data, there may be high, medium and low access levels, where a doctor has high access, clinicians and nurses have medium access, while patient's have low access (e.g., limited to their own data). An administrator can be assigned to maintain and modify the access levels as needed. The access levels are tied to the doctor's, clinician's, nurse's and patient's passwords in one embodiment, so that the appropriate access level is established automatically upon login. The access levels can also be applied to machines 12, such that a doctor, clinician, nurse and/or patient can log into any of the machines and be restricted to the appropriate level of access.
Each LAN 150a and 150b of distributed database 10b and 10c of clinic or dialysis center 130b in the illustrated embodiment connects to its own server computer 180 (180a, 180b) having a WAN or internet connection 182. Each LAN 150a and 150b of distributed database 10b and 10c also enables communication with personal computers 170. At least one personal computer 170 illustrated for clinic 130b can communicate with distributed databases 10b and 10c via both LAN's 150a and 150b. Clinic or dialysis center 130b also includes a server computer 180a that communicates only with distributed database 10b and a second server computer 180b that communicates with both distributed databases 10b and 10c via both LAN's 150a and 150b. Server computers 180a and 180b may or may not have a WAN or internet connection 182.
Clinic or dialysis center 130b also illustrates that one or more machine, such as machine 12k, can operate with multiple distributed databases 10b and 10c. The data synchronized in different distributed databases 10b and 10c can be different, and it may also be data of a different type. For example, distributed database 10b can be used for sharing medical treatment information, while distributed database 10c is used to share backend information, such as machine setting information, e.g., language of the machine, or user interface appearance of the machine. As discussed in detail with
Clinic or dialysis center 130c is outfitted with a distributed database 10d having single LAN 150 supporting multiple medical machines 12. Personal computers 170 located within clinic 130c are placed in data communication with each other via LAN 150. Server computers 180a and 180b having any of the functionality described above are likewise placed in data communication with distributed database 10d via LAN 150. Thus, any distributed database or LAN discussed herein can be connected to two or more server computers 180.
Clinic 130c also illustrates that a sensing device or other medical equipment 185 may also communicate with distributed database 10d via LAN 150 via wired or wireless connection 182, such as an Ethernet, Wi-Fi or Bluetooth connection. Sensing device or medical equipment 185 can for example be a weight scale used by patients of machines 12 of LAN 150 of clinic 130c. Each patient weighs himself or herself before and/or after treatment. Those weights are then transmitted wired or wirelessly via LAN 150 to the machine 12 that the patient uses that day for treatment, for example, to the machine 12 that the patient decides or requests to use that day for treatment. The patient can, for example, scan his or her identification card or enter an ID number at both the weight scale and machine 12 so that the weight measurement taken and the particular machine 12 can be matched. Alternatively, the sensor reading is stored at the sensing equipment 185 (e.g., scale or blood pressure measurement device), after which the machine 12 that the patient uses that day asks for the reading from the one or more sensor.
Further alternatively, sensing equipment 185 sends the reading to all machines 12 of distributed database 10d. Here, a weight value, for example, is stored in the machines in a record or file for the particular patient in one embodiment.
Any of the above-described methodologies can be used to match a reading from a blood pressure measurement device 185 to the particular machine 12. Any of the above-described methodologies can also be used to match a glucose measurement from a glucose monitor to a particular machine 12. Any of clinics 130a to 130c can use or employ such equipment 185. Equipment 185 can also include any physiological sensing equipment associated with an emergency room or dialysis center, for example, electrocardiogram (“ECG”), water treatment equipment, bed scales, access disconnection devices, bioimpedance measurement devices, pH sensors, lab testing equipment, blood sample analyzers, and/or a psychological status application stored on a PCD 175.
It should be appreciated that sensing equipment 185 does not have to be undedicated sensing equipment, but can instead be one or more pieces of sensing equipment dedicated to a machine 12, e.g., via a USB connection, electrical connection, pneumatic connection (e.g., pneumatic pressure measurement device), cable or wirelessly (e.g., using Bluetooth, Wi-Fi or ZigBee). Sensing equipment data 185 here is associated with the patient being treated on the machine 12 and is made accessible to other machines via distributed database system 10 as described herein.
While distributed database system 10 of
Clinic 130c also illustrates a machine 12l, which is not present along LAN 150 and thus is not part of distributed database 10d. Machine 12l is still part of the overall distributed database system 10 of the present disclosure, however, because machine 12l may at anytime become part of distributed database 10d, at which time the collective data of all machines 12 of distributed database 10d is updated. In the meantime, treatment is performed at disconnected machine 12l using locally stored prescription parameters, etc., and operating software that may not be current. System 10 can make the user of machine 12l aware of its status.
Referring now to
Distributed databases 10a to 10d can be grouped by machine or device type as well. For example, machines 12a to 12d may be drug delivery pumps or IV pumps, while machines 12e and 12f are other types of devices, such as, oxygenators or sensing equipment, such as, glucose monitoring. Distributed database 10b can be dedicated to a first patient connected to two IV pumps 12a and 12b and an oxygenator 12e. Distributed database 10c can be dedicated to a second patient connected to two IV pumps 12c and 12d and a glucose monitor 12f. Patient databases 10b and 10c can each have a common prescription, e.g., for operating pumps 12a, 12b and for incorporating oxygenator 12e for the first patient, and for operating pumps 12c, 12d and for incorporating glucose monitor 12f for the second patient. Distributed database 10a shares IV pump data across multiple patients, while distributed database 10d shares oxygenator 12e and glucose monitor 12f data across multiple patients. Distributed databases, such as databases 10a and 10d may therefore be dedicated to a patient, a group of like machines, or a group of like functionality, e.g., physiological sensing.
Machines 12 belonging to multiple distributed databases 10a to 10d allow overall system 10 to, for example, share medically related data, e.g. software updates and software configurations, in one distributed database 10a to 10d, while sharing medical data, e.g. prescription input data and treatment output data in another distributed database 10a to 10d. Doing so allows different distributed databases to be managed differently, for example, one distributed database may be a real time database, while another distributed database may be updated at set intervals, e.g., at the end of a shift or workday.
The different distributed databases 10a to 10d can perform different tasks, resulting in a very flexible overall system 10. In
Or, machine group 12a, 12b, 12e and group 12c, 12d, 12f may require different real time data to be monitored. For example, machine group 12a, 12b, 12e can be dedicated to a certain category of patient, e.g., infants, where operating pressure limits must be monitored very closely.
System 10 of
Real time alarm data (which is not limited to multiple distributed database scenarios and is described elsewhere in this application) allows nurses and clinicians to see an alarm occurring in a different room, on the other side of a wall, or at the other end of a clinic. The indication of an alarm could be as simple as a small pulsating icon in a corner of the user interface 14 (see
Each of the circles illustrated inside machines 12a to 12f of
While it is contemplated for system 10 to allow real time data sharing, it is also contemplated for the system to implement safeguards regarding such sharing. For example, in an embodiment, certain functions, such as downloading new software and servicing machines 12 can only take place after treatment when machines 12 are not performing treatment, e.g., are in a service mode, are in a hibernation mode or are otherwise disabled. It may be possible to transfer certain additional data during a disinfection mode when the machine is running but a patient is not connected. When a patient is connected, however, system 10 can be operated so as to take care not to transfer any data that may interrupt treatment or bother the patient.
In an embodiment, real time treatment data is not permanently stored in any machine 12. For example, real time data can be stored for as long as the treatment is ongoing, so that it can be viewed in a summary screen as described in detail herein, or for longer periods, such as a week, multiple weeks, or months. When treatment of any machine 12a to 12j is completed, or the real time data storage period expires, its real time data can be purged. Storing all real time treatment data permanently may fill memory too quickly. Generally, the values that will be stored permanently will be total values, average values, mean values, or other combined or statistically relevant values.
The different distributed databases 10a to 10d can have different updating speeds based, for example, upon which type of medically related data they convey and allow for access. Real time databases 10 may have high frequency update speed (e.g., microseconds, seconds, minutes), while administrative type of databases such as inventory and/or staffing databases 10 can be updated at a slower speed, such as once every hour, day or shift.
Referring now to
At block 206, the machine 12 at which the new data (e.g., array of data) is generated generates (i) a unique record identification (“id”), (ii) a time stamp, and (iii) a hash sum or checksum for the new data. The unique record id identifies both the machine 12 and the sequence number for that machine, which created the new data. So in
The hash sum identifies the actual content of the new data (e.g., array of data). For example, suppose a new array of data includes six pressure readings [a, b, c, x, y, z]. A hash sum, hs002500 could be generated for those readings, so that hs002500=[a, b, c, x, y, z]. hs002500 now represents the six pressure readings. The machines 12 of system 10 therefore do not have to look for the specific pressure readings; rather, the machines look to see if hs002500 exists. As explained in more detail below, the hash sum can be recalculated by a transferee machine of the distributed database after transfer from a transferor machine. The transferee machine can then compare the transferred and calculated hash sums to confirm that data has not been corrupted during transfer or to raise a system error if data corruption is detected. The transferee machine can ask the transferor machine to retransmit the data a predefined number of times, check for data corruption after each transfer, and raise a system error only after the data is found to be corrupted after each of the predefined number of data transfers.
The time stamp identifies the time at which the new data (e.g., array of data) is generated. The time stamp could, for example, be 30 May 2015/8:15 a for data created at 8:15 am on May 30, 2015. The time stamp serves to determine which data to move forward with when two hash sums for the same unique id do not match. In an embodiment, the hash sum corresponding to the later time stamp is chosen, as illustrated below in connection with
Blocks 208, 210 and 212 of method 200 each involve calculating and updating hash sums for multiple, increasing time periods. In the illustrated embodiment, the time periods include day, month, and multi-month. Alternatively, the time periods could be shift, day, week, and month. There can be as many different time periods as desired, e.g., three to six time periods. The time periods can be any desired duration, e.g., minutes, hours, shifts, days, weeks, months, years, etc. For ease of description, the remainder of the example of
At block 208, the machine 12 at which the new data (e.g., array of data) is generated calculates or updates a “day hash” for all has sums generated at that machine over the same day or twenty-four hour period during the same month. “day hash 30 May 2015” for example could equal or include hs002500 through hs010000 for a particular machine 12. The “day hash” calculation could be performed at the end of each day for example.
At block 210, the machine 12 at which the new data (e.g., array of data) is generated calculates or updates a “month hash” for all hash sums generated at that machine over the current month. “month hash may” for example could equal or include day hash 1 May 2015 to day hash 31 May 2015. The “month hash” calculation could also be performed at the end of each day, or set of days such as a week, for example.
At block 212, the machine 12 at which the new data (e.g., array of data) is generated calculates or updates a “total hash” for all hash sums generated at that machine over the current year, for example, “total hash 2015” for example could equal or include “month hash january” to “month hash may”. The “total hash” calculation could be performed at machine 12 at the end of each week or month, for example.
At oval 214, method 200 ends.
Referring now to
At block 224, the machine 12 (or aggregate of machines 12) picks a new machine 12 (outside aggregate if aggregate used) of system 10, which is currently online. At block 226, new data along with data tagging or metadata described in
When it is determined at diamond 230 that the received hash sum is the same as the recently calculated hash sum, the sending machine 12 (single machine 12 or representative machine 12 of an aggregate) determines whether there is another machine 12 (outside aggregate if aggregate used) to which to send the new data. If so, method 220 steps 224 to 232 are repeated until there are no new machines, as determined at diamond 232, at which time method 220 ends, as illustrated at oval 234.
Referring now to
At diamond 304, method 300 determines whether the total hash calculation performed in connection with
If the answer to the query at diamond 304 answer is no, meaning total hash for machine 12a does equal total hash for machine 12b, then the two machines 12a and 12b are synchronized completely. Method 300 proceeds to the end at oval 322.
If the answer to the query at diamond 304 is yes, meaning total hash for machine 12a does not equal total hash for machine 12b, then method 300 looks to drill down into the hash sums to see where the problem lies. At block 306, the comparing machine 12a or 12b (or if both machines compare then the machine performing the comparison first) selects a next month. In an embodiment, the first month selected is the current month because the preceding months may have already been synchronized, leading to the likelihood that the mismatch probably resides in the current month.
At diamond 308, the comparing machine 12a or 12b (or alternatively both machines 12a or 12b as discussed above) determines for the month selected at block 306 whether the month hash for machine A (month hash A) does not equal the month hash for machine B (month hash B). If the answer to the query of diamond 306 is no, meaning that month hash A does equal month hash B, then method 300 proceeds to diamond 320, which queries whether there is another month to analyze. If the answer to the query 320 is no, and there is no other month to analyze, method 300 ends, as illustrated at oval 322. If the answer to the query 320 is yes, and there is another month to analyze, then method 300 returns to select another month at block 306 (e.g., the first preceding month, followed by the second preceding month, and so on), after which the loop just described between block 306, diamond 308 and diamond 320 is repeated until a month hash A mismatch with month hash B occurs at diamond 308, or no more months remain, as determined at diamond 320.
If the total hash query at diamond 304 concludes that a mismatch does exist, but the monthly loop between block 306, diamond 308 and diamond 320 shows no mismatch, then method 300 ends in a system error, causing system 10 to prompt an administrator for assistance.
When method 300 finds a month in which a mismatch has occurred at diamond 308, method 300 next looks for the one or more day of the month in which the mismatch occurred. At block 310, the comparing machine 12a or 12b (or if both machines compare then the machine performing the comparison first) selects a next day. In an embodiment, the first day selected is the current day because the preceding days may have already been synchronized, leading to the likelihood that the mismatch probably resides with the current day.
At diamond 312, comparing machine 12a or 12b (or alternatively both machines 12a or 12b as discussed above) determines for the day selected at block 310 whether the day hash for machine A (day hash A) does not equal the day hash for machine B (day hash B). If the answer to the query of block 306 is no, meaning that day hash A does equal day hash B, then method 300 proceeds to diamond 318, which queries whether there is another day to analyze. If the answer to the query 318 is no, and there is no other day of the current month to analyze, method 300 inquires whether there is another month (e.g., another preceding month) to analyze as discussed above in connection with the loop including diamond 320.
If the answer to query 318 is yes, and there is another day to analyze, then method 300 returns to select another day at block 310 (e.g., the first preceding day, followed by the second preceding day, and so on), after which the loop just described between block 310, diamond 312 and diamond 318 is repeated until a day hash A mismatch with day hash B occurs at diamond 308, or no more days remain, as determined at diamond 318.
If the monthly query at diamond 308 concludes that a mismatch within a month does exist, but the loop between block 310, diamond 312 and diamond 318 shows no day hash mismatch for the month, then method 300 ends in a system error, causing system 10 to prompt an administrator for assistance.
When method 300 finds a day in which a mismatch has occurred at diamond 308, method 300 proceeds to the hash A and hash B synchronization steps illustrated at blocks 314 and 316. At block 314, day hash A is synchronized to machine 12b for the data mismatch date. At block 316, day hash B is synchronized to machine 12a for the data mismatch date. A subroutine for blocks 314 and 316 is discussed next in connection with
Once no more months for machines 12a and 12b need synchronization, as determined by the loop defined by block 306 to diamond 320, method 300 ends, as illustrated at oval 322.
Referring now to
At block 354, machine X selects a newly created piece or array of data to be analyzed. In one embodiment, machine X knows the last unique id to be analyzed and selects the next unique id in the sequence to be analyzed at block 354.
At diamond 356, method 350 queries whether the Y machine currently stores the corresponding unique id. If the answer is no, and machine Y does not already contain the unique id record being analyzed, then machine X copies and replaces the unique id record (along with its time stamp, hash sum, and corresponding actual data) to machine Y.
If the answer at diamond 356 is yes, and machine Y does already contain the unique id record being analyzed, then method 350 determines whether the current record hash for machine X does not equal the current record hash for machine Y, as determined at diamond 358. If the answer is no, and record hash X does equal record hash Y, then no further action is needed for this unique id, and method 350 proceeds to diamond 366 to look to see if a next unique id exists.
If the answer at diamond 358 is yes, and record hash X does not equal record hash Y, then method 350 at diamond 360 determines which machine's time stamp is later. If the time stamp for machine X is later than the time stamp for machine Y, then machine X at block 362 copies and replaces the unique id record (along with its time stamp, hash sum, and corresponding actual data) to machine Y. Next, at diamond 363, machine Y checks to see whether the unique id record (along with its time stamp, hash sum, and corresponding actual data) transferred correctly to machine Y. In one embodiment, machine Y calculates its own hash sum and compares it to the hash sum received from machine X (as discussed in connection with method 220 of
If instead the time stamp for machine Y is later than the time stamp for machine X, machine Y at block 364 copies and replaces the unique id record (along with its time stamp, hash sum, and corresponding actual data) to machine X. Next, at diamond 365, machine X checks to see whether the record (along with its time stamp, hash sum, and corresponding actual data) transferred correctly to machine X. In one embodiment, machine X calculates its own hash sum and compares it to the hash sum received from machine Y (as discussed in connection with method 220 of
After the verifying step at diamonds 363 or 365, method 350 causes machine X at diamond 366 to look for the next unique id in the sequence. If a next unique id in the sequence exists, method 350 repeats the sequence from block 354 to diamond 366. Eventually, machine X runs out of new data to check for synchronization with machine Y as indicated by negative response to diamond 366, at which time method 350 ends at oval 368. Again, in
Referring now to
At oval 372, method 370 begins. At block 374, the particular machine 12a to 12j selects a next month's worth of data to verify. At block 376, the particular machine 12a to 12j selects a next day's worth of data within the selected month to verify. At block 378, the particular machine 12a to 12j selects the next data (or array of data) to verify for the selected day of the selected month. At block 380, the particular machine 12a to 12j calculates a new hash sum for the selected data (or array of data). At diamond 382, the particular machine 12a to 12j compares the current (previously calculated) hash sum for the data (or array of data) with the newly calculated hash sum for the data (or array of data).
If the answer to diamond 382 is yes, and the current (previously calculated) hash sum for the data (or array of data) does not equal the newly calculated hash sum for the data (or array of data), then the particular machine 12a to 12j takes corrective action, as indicated at block 384, in response to determining that the particular data (or array of data) has become corrupted. In an embodiment, corrective action at block 384 includes deleting the corrupted data (or data array) associated with the current (previously calculated) hash sum. The deleted data will be replaced automatically via the synchronization procedures discussed next in connection with
After corrective action block 384, or if the answer to diamond 382 is no, and the current (previously calculated) hash sum for the data (or array of data) does equal the newly calculated hash sum for the data (or array of data), then the particular machine 12a to 12j at diamond 386 queries whether there is another data record for the particular day to verify. If so, the loop between block 378 and diamond 386 is repeated until there is no new data record for the particular day to verify, upon which the particular machine 12a to 12j at block 388 calculates a new hash sum for the selected day (which corresponds to block 208 of
After block 388, the particular machine 12a to 12j at diamond 390 queries whether there is another day in the selected month having data to verify. If so, the loop between block 376 and diamond 390 is repeated until there is no new day within the selected month having a data record to verify, at which time the particular machine 12a to 12j at block 392 calculates a new month hash sum for the selected month (which corresponds to block 210 of
After block 392, the particular machine 12a to 12j at diamond 394 queries whether there is another month in the total hash having data to verify. If so, the loop between block 374 and diamond 394 is repeated until there is no new month within the total hash sum calculation having a data record to verify, at which time the particular machine 12a to 12j at block 396 calculates a new total hash sum (which corresponds to block 212 of
After block 396, method 370 ends as at oval 398. Method 370 of
The methods of
At oval 402, method 400 begins. It is possible to begin data updating at a time when machines 12 have finished delivering treatments. For instance, if clinic or dialysis center 130 provides treatment between 8:00 AM and 7:00 PM, method 400 can begin automatically later in the evening, e.g., 11:00 PM during or after machines 12 have all been cleaned and prepared for the next treatment shift or next day. Machines 12 of distributed database system 10 may all be hibernating or in a sleep mode at 11:00 PM. If needed, method 400 wakes each machine 12 of distributed database system 10 from a sleep mode to perform method 400.
Diamond 404 and blocks 406 and 408 for a given machine 12 (or aggregate of machines 12) generate and send any new data for that machine to all other machines of distributed database system 10. At diamond 404, machine 12 determines whether it has any new data to send. If the answer is yes, there is new data to send, machine 12 at block 406 performs the tag data or metadata of method 200 of
It should be appreciated that steps 404 to 408 can be performed (i) so as to push to the other machines each tagged new data individually as it is created, or alternatively (ii) to collect all new data for that day or time period and send the collected data as one packet to all other online machines 12 of distributed database system 10. When there is no other new data for machine 12, as determined at diamond 404, method 400 moves to a synchronization (“pull”) portion to synchronize with any other machine 12 that may have been offline.
The synchronization portion of method 400 is performed at blocks 410, 412 and diamond 414. The same machine 12 (or aggregate of machines 12) at steps 404 to 408 now at block 410 picks another machine 12 of distributed database system 10 to see if any data needs to be synchronized. In an embodiment, machine 12 picks the next addressed machine, and then the following machine and so on. For example, machine 12a first picks machine 12b, then machine 12c, and so on. The last addressed machine picks the first addressed machine, and then proceeds in order, e.g., machine 12j picks machine 12a, then machine 12b, and so on.
At block 412, the given machine 12 and its chosen machine 12 perform the synchronization sequence illustrated in
Method 400 is then performed for each machine 12 (or aggregate of machines 12) of distributed database system 10. In this manner, each machine 12 (i) sends its new data to each of the other machines 12 of system 10 and (ii) is synched with each other machine of system 10. Thus when a patient arrives at clinic or dialysis center 130, e.g., the next day, the patient can be brought to any machine 12a to 12j of distributed database system 10. That machine will have that patient's full treatment history. The machine will also have the patient's preferred treatment settings, or perhaps multiple sets or ranges of preferred settings for the patient, streamlining treatment setup for the nurse or clinician, and optimizing treatment results for the patient.
An alternative “push” embodiment (not illustrated) is a hub and spoke type of push. One of the machines acts as a hub machine, while other machines of distributed database system 10 act as spokes. Here, one or more machine of the cluster, e.g., machine 12a receives the data from all other machines 12b to 12j. Machines 12b to 12j can each send their respective data according to a sequence requested by hub machine 12a. Hub machine 12a will then store the data from machines 12b to 12j in the order in which the data is sent to hub machine 12a. Once hub machine 12a is fully updated with data from all the other machines of distributed database system 10, hub machine 12a sends out the totalled data, including machine 12a's data, to all other machines 12b to 12j in the distributed database system 10, which can again be according to a sequence requested by hub machine 12a. Again, in the end, each of the, e.g., ten machines, should have the same data from every other machine of the distributed database system.
Referring now to
At oval 432, method 430 begins. Steps 434 and 436 are very similar to steps 404 and steps 406 of method 400 of
The same machine 12 or aggregate of machines 12 at steps 434 and 436 now at block 438 picks another machine 12 of distributed database system 10 to see if any data needs to be synchronized. In an embodiment, machine 12 picks the next addressed machine, and then the following machine and so on, as described above. At block 440, the given machine 12 and its chosen machine 12 perform the synchronization sequence illustrated in
Method 430 is then performed for each machine 12, or aggregate of machines 12, of distributed database system 10. Thus each machine 12 (i) pulls data from and (ii) is synchronized with each other machine 12 of distributed database system 10. Afterwards, when a patient arrives at clinic or dialysis center 130, e.g., the next day, the patient can be brought to any machine 12a to 12j of distributed database system 10. That machine will have that patient's full treatment history and preferred settings.
Referring now to
In an embodiment, new software is downloaded automatically to the lowest numbered or earliest lettered addressed machine 12 of distributed database system 10 that is online. For example, server computer 180 via LAN 150 would download the software to machine 12a if it is online, or to machine 12b if it is online and machine 12a is offline. Alternatively, an installer can bring a USB drive manually to any machine 12a to 12j of distributed database system 10 for initial installation. That machine would then select the next addressed online machine, e.g., if the installer brings the USB drive to machine 12g, machine 12g would thereafter deliver the new software to machine 12h, and so on.
At diamond 506, the user (nurse or clinician) at the initial machine 12 decides whether or not to confirm the installation of the new operating software. The user does not have to accept the new software for whatever reason, for example, the user likes the current software. If the user decides not to accept the new software at block 508, the new software is not installed at the initial machine 12. The new software nevertheless resides in the memory of the initial machine 12, with a flag that it has been rejected and the date rejected. A system administrator can be notified that the initial machine 12 rejected the software. The rejected software can be accepted at a later date, and may be configured to periodically prompt the user to see if they are ready for the software update.
If the user decides to accept the new software at diamond 506, the new software or configuration of software at block 510 is installed at the initial machine 12. In either case, after block 508 (download but no install) or block 510 (download and install), the initial machine picks a new machine 12 of distributed database system 10 and asks the new machine using LAN 150 whether the new machine needs the new software, as indicated at diamond 514. Again, the new machine can be the next addressed machine, e.g., machine 12a selects machine 12b, which selects machine 12c, and so on. Machine 12j (of
If the answer is to the question of diamond 514 is no, e.g., the new machine 12 already has the new operating software, then initial machine 12 at diamond 518 looks to see if another machine of distributed database system 10. If the answer to the question of diamond 514 is yes, e.g., the new machine 12 needs the new operating software, then the installation subroutine at block 516 is performed. The installation subroutine is discussed in detail below in connection with
When the installation subroutine at block 516 is completed, or if the new machine does not need the new operating software as determined at diamond 514, method 500 at diamond 518 determines whether there is another machine of distributed database system 10 to query. If so, then the loop created between block 512 to diamond 518 is repeated until there is no other machine of distributed database system 10 to query. Method 500 then ends at oval 520.
Referring now to
If the user at the new machine decides to accept the new software at diamond 534, the new software or configuration of software at block 538 is installed at the new machine 12. In either case, after block 536 (download but no install) or block 538 (download and install), the initialization subroutine of method 530 ends, as indicated at oval 540. Upon returning to the loop created between block 512 and diamond 518, the new machine becomes the first new machine, which at block 512 picks a second new machine. If the second new machine needs the new operating software, as determined at diamond 514, then in subroutine 516, the first new machine downloads the new software to the second new machine. If the second new machine does not need the new operating software, as determined at diamond 514, then a third new machine can be picked at block 512. If the third new machine needs the new operating software, as determined at diamond 514, then in one embodiment of subroutine 516, the first new machine downloads the new software to the third new machine. In an alternative embodiment, because the second new machine already had the new operating software, as determined at diamond 514, the second new machine can download the new software to the third new machine.
Method 550 of
At diamond 556, the newly online machine 12 compares its operating software version(s) with that of the selected machine to see if the selected machine has a higher version(s). If no, the newly online machine 12 checks if there is another machine to query at diamond 560. If yes, the newly online machine 12 retrieves (but does not install) the newer software from the selected machine, as indicated at block 558. After block 558, or if the answer to diamond 556 is no, the newly online machine checks to see if there is another machine to query at diamond 560. If there is another machine 12 to query, newly online machine 12 at diamond 556 compares its latest software version (its original software version or a newer version retrieved at block 558) to that of the second selected machine to see if the second selected machine 12 has an even later version. If so, the newly online machine retrieves the even later version and purges the earlier version. The loop at block 554 to diamond 560 is repeated until the newly online machine 12 queries all other online machines 12 of distributed database system 10, as determined at diamond 560.
At diamond 562, if the newly online machine 12 has retrieved no new software, then method 550 ends at oval 570. At diamond 562, if the newly online machine 12 has retrieved new software, then the user (e.g., nurse of clinician) at diamond 564 is prompted to either confirm or deny the installation of the newly retrieved software. The user again does not have to accept the new software for whatever reason, for example, the user likes the current software. If the user decides not to accept the new software at block 566, the new software is not installed at the new machine 12. The new software nevertheless resides in the memory of new machine 12, with a flag that it has been rejected and the date rejected. A system administrator can be notified that the new machine 12 has rejected the software. The rejected software can be accepted at the newly online machine 12 at a later date, and may be configured to periodically prompt the user if they are ready for the software update.
If the user at the newly online machine decides to accept the new software at diamond 564, the new software or configuration of software at block 568 is installed at new machine 12. Method 550 then ends at oval 570. It should be appreciated that the software receiving machine 12 of method 550 does not have to be a newly online machine and can instead be each machine 12 of distributed database system 10, which prompts itself periodically to see if there is any newer operating software to download for approval. Also, in any software update scenario discussed herein, while it may be advantageous or needed under a regulatory control to require user acceptance or confirmation, e.g., at diamond 564 above, such acceptance or confirmation in an alternative embodiment is not required.
Referring now to
Clinician's summary screen 246 of
As discussed above with
Besides the clinician's summary screen, it is contemplated to provide one or more additional summary screens, such as a treatment summary screen, patient summary screen, planning summary screen, inventory or stock keeping summary screen, and staffing summary screen. Each of the screens can be called up via a home screen button as illustrated above in
In general, a “treatment summary” button when pressed leads to a screen providing information for a single patient and a single treatment. The “patient summary” button when pressed leads to a screen providing information for a single patient over multiple treatments. The “planning summary” button when pressed leads to a screen that can be a daily, weekly, and/or monthly calendar showing planned dates for one or more patient's treatments. The “stock keeping summary” button when pressed can lead to a stock summary screen listing supply names, how many of each supply is in stock and how many of each supply is on back order. The “staffing summary” button when pressed can lead to a “staffing summary” screen listing all clinicians, nurses and doctors associated with the clinic, and which ones are currently at the clinic, their shift times, their technical specialties, and the like. Thus a nurse or clinician at any machine 12 of distributed database 10 can reach any of the above summaries of information, quickly and easily.
In one embodiment, a user such as a nurse or clinician must enter identification and receive authorization to review any information of the distributed databases of the present disclosure, including the summary information just described. For example, machine 12 between home screen 242 and clinician summary screen 246 can present an authentication screen (not illustrated), which requests the user's user identification and password. Machine 12 is programmed such that only after entry of an authorized username and password can the requesting nurse or clinician see clinician summary screen. It is likewise contemplated for the retrieval of any and all distributed database data, e.g., any medically related data as described above, to be username and password protected. Remote computers 170 and PCD's 175 may be subject to even more stringent authentication, such as being required to manually enter a Completely Automated Public Turing test to tell Computers and Humans Apart (“CAPTCHA”) code generated at the remote computers 170 and PCD's 175. Strong authentication can also be required at machine 12 and/or at the remote computers 170 and PCD's 175, e.g., in the form of an authentication (e.g., login) based on something the requesting person knows (e.g., a password) and something the requesting person possesses (e.g., an authorization card). Moreover, it is contemplated that system 10 keep track, e.g., at one or more of machine 12, server 180, and/or personal computer 170, of a log of which people, e.g., of a clinic 130a to 130c, have accessed which data on distributed database system 10. In this manner, a listing of which individuals have accessed any particular data of system 10 can be generated.
Referring now to
At block 258, the new data and the updated trend are synchronized to the other machines 12 of distributed database system 10. The synchronization can be performed according to any of the methods discussed above in connection with the methods of
An optional step is provided at block 260 (shown in phantom line). The data here is backed up to one or more server computer 180 or personal computer 170. As discussed herein, distributed database system 10 can operate without any server computers. For example the backup at block 260 could instead be to an external memory storage device, e.g., a USB or flash drive. However, if the clinic 130 wants to connect a server computer 180 or personal computers 170 to LAN 150, distributed database system 10 provides the opportunity to do so, e.g., for use as backup memory devices.
At block 262, the data is purged from distributed database system 10 after a time period, e.g., six months or one year, as desired, and as dictated by the memory capacity of machines 12a to 12j of distributed database system 10. In this manner, the memory capacity of machines 12a to 12j does not have to be unduly large. However, even though the individual data points are purged, the data can still be maintained on machines 12 of LAN 150 as part of one or more trend. Also, the data can be backed-up and retrieved from memory storage at a later time if needed.
It should be noted that the memory or hard disk needed for most machines 12 will at the time of filing this application have a typical capacity from about thirty-two to sixty-four gigabytes. In many cases, the size of memory for machines 12 is selected based upon cost, where a larger memory can actually be less expensive than a smaller memory because the larger memory is in greater supply and/or is more readily available. If a typical treatment requires about two to four kilobytes of data, machines 12 can store on the order of million treatments. Assuming that a given machine 12 performs 5,000 treatments during its lifetime of, for example, ten years, that machine 12 can store treatment data for 200 machines. Nevertheless, data may need to be purged from system 10 reasons other than storage capacity. For example, medical regulations of certain jurisdictions can require that information about a patient be removed when the patient no longer has a relationship with a clinic. Thus at block 262, the designated time period may be due to a regulatory requirement rather than a memory storage issue.
To delete or remove data, system 10 in one embodiment deletes the data but leaves metadata attached to the data. System 10 uses the left-behind metadata to make sure the deleted data is not restored when a machine 12 that has been disconnected from the distributed database at the time of deletion is later reconnected. System 10 provides a hand shaking process to ensure that all deleted data is deleted from all machines 12 in the distributed database. Here, deleted data is given a new header or identifier and a trail for how and when the data has been deleted. The header and trail are propagated out to the other machines 12 according to any of methods discussed in connection with
At oval 264, method 250 ends.
Dialysate circuit 30 includes a purified water inlet line 32, an acid (“A”) concentrate line 34 and a bicarbonate (“B”) concentrate line 36. Purified water inlet line 32 receives purified water from a purified water device or source 22. The water may be purified using any one or more process, such as, reverse osmosis, carbon filtering, ultraviolet radiation, electrodeionization (“EDI”), and/or ultrafiltering.
An A concentrate pump 38, such as a peristaltic or piston pump, pumps A concentrate from an A concentrate source 24 into purified water inlet line 32 via A concentrate line 34. Conductivity cell 40 measures the conductive effect of the A concentrate on the purified water, sends a signal to logic implementer 20, which uses the signal to properly proportion the A concentrate by controlling A concentrate pump 38. The A conductivity signal is temperature compensated via a reading from temperature sensor 42.
A B concentrate pump 44, such as a peristaltic or piston pump, pumps B concentrate from a B concentrate source 26 into purified water inlet line 32 via B concentrate line 36. Conductivity cell 46 measures the conductive effect of the B concentrate on the purified water/A concentrate mixture, sends a signal to logic implementer 20, which uses the signal to properly proportion the B concentrate by controlling B concentrate pump 44. The B conductivity signal is also temperature compensated via a reading from temperature sensor 48.
A heating tank 50 operates with a heater 52 controlled by logic implementer 20 to heat purified water for treatment to body temperature, e.g., 37° C. Heating the water in tank 50 will also degas the water. For ease of illustration, a separate degassing chamber and pump are not illustrated but may be provided to aid expansion tank 50 in removing air from the purified water. The fluid exiting conductivity cell 46 is therefore freshly prepared dialysate, properly degassed and heated, and suitable for sending to dialyzer 102 for treatment. A fresh dialysate pump 54, such as a gear pump, delivers the fresh dialysate to dialyzer 102. Logic implementer 20 controls fresh dialysate pump 54 to deliver fresh dialysate to dialyzer 102 at a specified flowrate as described in more detail below.
A drain line 56 via a used dialysate pump 58 returns used dialysate from the dialyzer to a drain 60. Logic implementer 20 controls used dialysate pump 58 to pull used dialysate from dialyzer 102 at a specified flowrate. An air separator 62 separates air from the used dialysate in drain line 56. A pressure sensor 64 senses the pressure of used dialysis fluid within drain line 56 and sends a corresponding pressure signal to logic implementer 20.
Conductivity cell 66 measures the conductivity of used fluid flowing through drain line 56 and sends a signal to logic implementer 20. The conductivity signal of cell 66 is also temperature compensated via a reading from temperature sensor 68. A blood leak detector 70, such as an optical detector, looks for the presence of blood in drain line, e.g., to detect if a dialyzer membrane has a tear or leak. A heat exchanger 72 recoups heat from the used dialysate exiting dialysate circuit 30 to drain 60, preheating the purified water traveling towards heater 52 to conserve energy.
A fluid bypass line 74 allows fresh dialysate to flow from fresh dialysate line 76 to drain line 56 without contacting dialyzer 102. A fresh dialysate tube 78 extends from renal failure therapy machine 12 and carries fresh dialysate from fresh dialysate line 76 to dialyzer 102. A used dialysate tube 80 also extends from renal failure therapy machine 12 and carries used dialysate from dialyzer 102 to drain line 56.
Fresh dialysate line also includes a conductivity sensor or cell 82 that senses the conductivity of fresh dialysate leaving a UF system control unit 90 and sends a corresponding signal to logic implementer 20. The conductivity signal of cell 82 is likewise temperature compensated via a reading from temperature sensor 84.
An ultrafilter 86 further purifies the fresh dialysate before being delivered via dialysate line 76 and fresh dialysate tube 78 to dialyzer 102. As discussed in more detail below, one or more ultrafilter 88 can be used to purify the fresh dialysate to the point where it can be used as substitution fluid to perform pre- or post-dilution hemofiltration or hemodiafiltration.
UF system 90 monitors the flowrate of fresh dialysate flowing to dialyzer 102 (and/or as substitution fluid flowing directly to the blood set (
Renal failure therapy machine 12 uses plural valves 92 (collectively referring to valves 92a to 92l) under the control of logic implementer 20 to selectively control a prescribed treatment. In particular, valve 92a selectively opens and closes bypass line 68, e.g., to allow disinfection fluid to flow from fresh dialysate line 76 to drain line 56. Valve 92b selectively opens and closes fresh dialysate line 76. Valve 92c selectively opens and closes used dialysate or drain line 56. Valve 92d selectively opens and closes drain line 56 to drain 60. Valve 92e selectively opens and closes purified water line 32 to purified water source 22. Valves 92f and 92g control A and B concentrate flow, respectively. Valves 92h to 92k operate with UF system 90.
Arterial line 106 includes a pressure pod 110, while venous line 108 includes a pressure pod 112. Pressure pods 110 and 112 operate with blood pressure sensors (not illustrated) mounted on the machine housing, which send arterial and venous pressure signals, respectively, to logic implementer 20 (
Arterial line 106 of blood circuit or set 100 is operated on by blood pump 120, which is under the control of logic implementer 20 to pump blood at a desired flowrate. Renal failure therapy machine 12 also provides multiple blood side electronic devices that send signals to and/or receive commands from logic implementer 20. For example, logic implementer 20 commands pinch clamps 122a and 122b to selectively open or close arterial line 106 and venous line 108, respectively. A blood volume sensor 124 monitors how the patient's hematocrit changes over the course of treatment. Blood volume sensor 124 is in one embodiment placed in arterial line 106 upstream of the blood pump. Air detector 126 looks for air in the venous blood line. Substitution tube 98 as illustrated can be coupled to arterial line 106 for pre-dilution HF or HDF and/or venous line 108 for post-dilution HF or HDF.
It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present invention and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1550885-6 | Jun 2015 | SE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2016/064392 | 6/22/2016 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2016/207206 | 12/29/2016 | WO | A |
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