The present subject matter relates to compact medical device inserters for inserting a medical device through the skin of a subject, as well as to systems incorporating or utilizing such inserters and methods for making and using the inserters and incorporating systems.
The detection and/or monitoring of glucose levels or other analytes, such as lactate, oxygen, A1C, or the like, in certain individuals is vitally important to their health. For example, the monitoring of glucose is particularly important to individuals with diabetes. Diabetics generally monitor glucose levels to determine if their glucose levels are being maintained within a clinically safe range, and may also use this information to determine if, and/or when, insulin is needed to reduce glucose levels in their bodies or when additional glucose is needed to raise the level of glucose in their bodies.
Growing clinical data demonstrates a strong correlation between the frequency of glucose monitoring and glycemic control. Despite such correlation, many individuals diagnosed with a diabetic condition do not monitor their glucose levels as frequently as they should due to a combination of factors including convenience, testing discretion, pain associated with glucose testing, and cost.
Devices have been developed for the automatic monitoring of analyte(s), such as glucose, in bodily fluid such as in the blood stream or in interstitial fluid (“ISF”), or other biological fluid. Some of these analyte monitoring devices are configured so that at least a portion of the devices are positioned below a skin surface of a user, e.g., in a blood vessel or in the subcutaneous tissue of a user, so that the monitoring is accomplished in vivo.
The positioning of the analyte monitoring devices in the body is typically accomplished with the aid of an insertion device, or inserter, that includes a sharp for penetrating the skin and allowing simultaneous or subsequent placement of the sensor within the resulting skin puncture. Conventional inserters can be bulky and/or complex devices that are expensive to manufacture and burdensome to use. These complex inserters are typically stored in sterile packaging and are not reusable, thus increasing the costs for the consumer. Furthermore, many typical inserters require some degree of assembly prior to use, either assembly of the inserter or the sensor device to be placed on and in the body, or both.
Thus, with the continued development of analyte monitoring devices and systems, there is a need for improved inserters that, for example, are more compact, less complex, easier to use, and cheaper to manufacture.
Provided herein are example embodiments of improved medical device inserters, systems incorporating the same, and related methods of use. The inserter embodiments can be used in a wide variety of medical device applications, one example of which is for the insertion of analyte monitoring devices into the human body. While the inserter embodiments will be described herein with reference to an example analyte monitoring application, these embodiments are not limited to only that application.
Other systems, devices, methods, features and advantages of the subject matter described herein will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, devices, methods, features and advantages be included within this description, be within the scope of the subject matter described herein, and be protected by the accompanying claims. In no way should the features of the example embodiments be construed as limiting the appended claims, absent express recitation of those features in the claims.
The details of the subject matter set forth herein, both as to its structure and operation, may be apparent by study of the accompanying figures, in which like reference numerals refer to like parts. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the subject matter. Moreover, all illustrations are intended to convey concepts, where relative sizes, shapes and other detailed attributes may be depicted schematically rather than literally or precisely.
Before describing this medical device inserter subject matter in greater detail, it is worthwhile to describe example embodiments of systems, devices, and methods with which this subject matter can be implemented.
A number of systems have been developed for the automatic monitoring of the analyte(s), like glucose, in bodily fluid such as in the blood stream, in interstitial fluid (“ISF”), dermal fluid of the dermal layer, or in other biological fluid. Some of these systems are configured so that at least a portion of a sensor is positioned below a skin surface of a user or recipient, e.g., in a blood vessel or in the dermal or subcutaneous tissue of a user, to obtain information about at least one analyte of the body.
As such, these systems can be referred to as “in vivo” monitoring systems.
The in vivo analyte monitoring system 100 can be differentiated from “in vitro” systems that contact a biological sample outside of the body (or rather “ex vivo”) and that typically include a meter device that has a port for receiving an analyte test strip carrying bodily fluid of the user, which can be analyzed to determine the user's blood sugar level. While in many of the present embodiments the monitoring is accomplished in vivo, the embodiments disclosed herein can be used with in vivo analyte monitoring systems that incorporate in vitro capability, as well has purely in vitro or ex vivo analyte monitoring systems.
Sensor 104 can be part of the sensor control device 102 that resides on the body of the recipient and that contains the electronics and power supply that enable and control the analyte sensing. Sensor control device 102, and variations thereof, can also be referred to as a “sensor control unit,” an “on-body electronics” device or unit, an “on-body” device or unit, or a “sensor data communication” device or unit, to name a few.
Reader device 120 can receive sensed analyte data from sensor control device 102 and processes and/or displays that sensed analyte data, in any number of forms, to the user. This device and variations thereof can be referred to, for example, as a “reader device” (or simply a “reader”), “handheld electronics” (or a handheld), a “portable data processing” device or unit, a “data receiver,” a “receiver” device or unit (or simply a receiver), or a “remote” device or unit.
Sensor control device 102 and/or reader device 120 can each be configured to communication with a drug delivery device 160 that is capable of injecting or infusing a drug, such as but not limited to insulin, into the body of the individual wearing sensor control device 102. Sensor control device 102, reader device 120, and drug delivery device 160 can each be configured to communicate with a local or remote computer system 170 (such as a personal or laptop computer, a tablet, or other suitable data processing device) and/or with a remote trusted computer system 180 (which can include one or more computers, servers, networks, databases, and the like).
Additional detail regarding these and other example embodiments of in vivo monitoring systems 100 is provided in the following sections.
Embodiments of Medical Device Inserters
In another embodiment, insertion device 200 can be used with a medical device having a drug infusion (e.g., insulin) cannula, where insertion device 200 applies the device to the body of a recipient such that the drug infusion cannula is inserted into the body of the recipient with the aid of a sharp. In certain embodiments, this medical device can also include sensor control device 102 (or at least analyte sensor 104, which may be separate from the cannula such that two sharps are used to create two body punctures, or analyte sensor 104 may be integrated with or attached to the cannula such that both sensor 104 and the cannula are inserted into the same body puncture with the aid of the same sharp).
The operator performing the insertion process with inserter 200 can be the same individual as the recipient of sensor 104, or the operator and recipient can be different individuals. Whether the same or different, both the operator and recipient are users of inserter 200. Both can also be users of system 100, or components thereof.
The relative terms “posterior” and “anterior” are used herein to denote the back and front of the device, respectively, where the anterior side is the side placed against the recipient's skin from which sensor 104 is deployed, and the opposite side is the posterior side that is generally held in the operator's hand. As used herein, the term “advancement” in its various forms generally refers to motion in a posterior to anterior direction, and the term “retraction” in its various forms generally refers to motion in an anterior to posterior direction.
Sharp body 210 can slidably receive sensor 104, which in turn can be coupled with sensor control device housing 103 by way of a sensor mount 112. Sensor control device 102 can be releasably coupled with inserter 200 in a number of different manners. For example, one or more deflectable elastic projections, snaps, clips, or shaped contours can be used to mechanically engage with housing 103 of sensor control device 102. The attachment mechanism can be self-releasing or can include an actuator mechanism (e.g., a trigger, lever, switch, and the like) to allow a user to manually unlock sensor control device 102 from housing 201. In the embodiment described with respect to
In many embodiments it is desirable that sensor control device 102 be released from inserter 200 by pulling inserter 200 away from the user's body (i.e., posteriorly) after attaching sensor control device 102 to the user's skin, such as with adhesive layer 105. Thus the posteriorly directed force necessary to release sensor control device 102 from inserter 200 should be less than the force at which sensor control device 102 is detached from the user's body. Thus, for example, contoured surface 225 on the interior of each arm 223 provides a coupling mechanism that can be released with the exertion of a relatively low pulling force, as compared to standard mechanical catches with detents. In other embodiments, sensor control device 102 can be attached to inserter 200 with a low tack adhesive or with the use of one or more magnetic elements (e.g., a magnet on sensor control device 102 and/or a magnet on inserter 200, each adapted to attract another magnet or ferromagnetic material on the opposite structure).
As can be seen in
Upon fully advancing housing 201 against the user's body, adhesive layer 105 of sensor control device 102 contacts and engages with the user's skin. Shroud 220 is fully (or mostly retracted) and sharp 211 and sensor projection 108 are advanced to the desired depth in the user's body.
Referring back to the first stage of operation,
In many embodiments, in the extended position, shroud 220 covers sharp 211 and sensor projection 108 thereby protecting users from sharp 211, and protecting sharp 211 and sensor projection 108 from external damage and/or contamination. Shroud 220 can include an anterior opening 276 (
In the embodiments depicted, shroud 220 is a cylindrical or substantially cylindrical housing. Those of ordinary skill in the art, upon reading this description, will readily recognize those structures that are “substantially cylindrical,” as such structures are not limited to a pure geometric cylinder but include all variations of cylinder shapes, including those that are polygonal in cross-section, tapered, at least partially conical, hourglass-like, and so forth. Shroud 220 can also have a non-cylindrical shape that acts as a retractable cover or shield for one or both of sharp 211 and sensor projection 108.
Shroud 220 can be held in the extended position relative to device 102 by a lock mechanism 234 that engages shroud 220 with sensor control device 102. An embodiment of lock mechanism 234 is depicted, for example, in
Each detent 235 can be coupled with an elastic support 240 that is biased towards the position shown in
In other embodiments, the structures that form lock mechanism 234 can be reversed. For example, at least one recess or groove can be present on each elastic support 240 instead of a detents 235, and each such recess or groove can engage with a complementary detent or projection on sensor control device 102 or housing 103, similar to detent 136 or 137.
Angled surfaces can be present on detents 136, 137, and 235 and any portion of the other releasable lock mechanisms described herein in order to facilitate releasable engagement. The angle of these surfaces can be varied to obtain the desired resistance to engagement and/or disengagement. Angling of contact surfaces can facilitate translation of longitudinal motion (e.g., posterior-anterior motion) of one structure, e.g., the main body of shroud 220, into lateral motion (e.g., sideways motion) of another structure, e.g., elastic arms 240.
When anterior surface 221 of shroud 220 is placed against the recipient's body and sufficient force is applied to housing 201 in a direction towards the recipient's body, detents 235 will release from recess 135 and allow shroud 220 to retract into an opening 109 (
Referring to
Any number of one or more elastic arms 260 can be utilized. In this embodiment, two elastic arms 260 are present, each in a position that opposes the other (e.g., present on opposite sides of sharp body 205). In some embodiments, sharp support 205 is a discrete component coupled with housing 201. In other embodiments, housing 201 and sharp support 205 are integral, e.g., molded from a single polymer. In either case, elastic arms 260 can be considered as coupled with housing 201.
Each recess 256 can be releasably maintained over detent 255 by elastic arm 260 to lock or secure sharp body 210 in position with respect to sharp support 205. Each elastic arm 260 is biased towards and deflectable outwardly from the position shown in
Shroud 220 comprises a release mechanism 265 configured to unlock lock mechanism 254 and uncouple sharp support 205 from sharp body 210. In this embodiment, release mechanism 265 is a projection that extends away from surface 221 towards sharp support 205 when shroud 220 is in the extended position depicted in
Biasing element 215 (
Referring back to
Surface 270 faces anteriorly and is present on an extension or ledge 272 of sharp body 210 that is offset and extends away from sharp 211. This extension 272 is sized to fit and slide longitudinally within chamber 269, which has an open side to allow the extension's passage. Surface 275 faces posteriorly and is present on the anterior side of shroud 220, also in a position that is offset from sharp 211 itself.
The posterior side of sharp support 205 has a relatively large cylindrical portion that is coupled with an interior channel of housing 201, as shown in
Reference is now made to the second stage of operation, described with respect to
Because sharp support 205 is held in place by housing 201, and because sharp body 210 is held in place with respect to sharp support 205 by lock mechanism 254, the retraction of shroud 220 causes sharp 211 to pass through lumen or channel 277 (
The continued retraction of shroud 220 causes release mechanism 265 to begin to disengage lock mechanism 254. As described earlier, the opposing angled or rounded surfaces 266 and 267 are pressed together (
Upon disengagement of lock mechanism 254, sharp body 210 is no longer secured in place with respect to sharp support 205, and the pressure exerted by the now compressed biasing element 215 between surfaces 270 and 275 causes sharp body 210 to move posteriorly, i.e., to retract, into a space or cavity 278 (
In alternative embodiments, inserter 200 can be configured such that sharp 211 is manually withdrawn, e.g., the operator grasps sharp 211 and manually pulls it from the recipient's body. In other embodiments, sensor projection 108 can be configured, for example, with a sharp anterior terminus that pierces the user's body directly without the need for an additional sharp, thus also eliminating the need for withdrawal of an ancillary sharp.
Proximal portion 106 of sensor 104 can at least partially reside within an elongate opening or gap 279 in sharp body 210 (
With reference to
Biasing element 215 can cycle through three states during the insertion process. In the first state, shroud 220 is in the extended position and biasing element 215 is in a relatively uncompressed state (
As shroud 220 is retracted, biasing element 215 is compressed until shroud 220 reaches an intermediate position where shroud 220 is not yet fully retracted but the release of lock mechanism 254 is imminent (
The intermediate position where sharp 211 begins retraction can be adjusted according the needs of the application and can be, for example, at the halfway distance between full extension of shroud 220 and full retraction of shroud 220 where shroud 220 is flush with surface 105 of sensor control device (
Once lock mechanism 254 is released, biasing element 215 begins to decompress from the relatively compressed state back towards a third relatively uncompressed state (
After reaching the fully retracted state, surface 221 of shroud can be generally flush with adhesive surface 105 of sensor control device 102 such that adhesive surface 105 is in contact with the recipient's skin. Once adequate adhesive contact is obtained, the operator can remove inserter 200 leaving sensor control device 102 behind on the recipient's body with sensor 104 at least partially in vivo.
In some embodiments, shroud 220 can be maintained or secured in the fully retracted position by a lock mechanism similar to those described herein, or otherwise. For example, upon reaching a fully retracted position, detent 235 of shroud 220 can enter a recess (not shown) on an inner surface of housing 201, such as inner wall 235 (
Also shown here is generally cylindrical opening 111 which receives shroud 220, sharp body 210, and sharp support 205. Located around the periphery of opening 111 are multiple detents 136 and 137. In this embodiment, each detent 136 is offset from each detent 137 such that the two detents are not directly above or below each other. In other embodiments the detents can be aligned such that they are directly above and below each other. In still other embodiments, detent 136 and/or detent 137 can be in the form of a ridge or lip that extends partially or entirely around the periphery of opening 111. Detent 136 is relatively anterior to detent 137, and detent 136 resists, and in many instances prevents, detent 235 of shroud 220 from passing in a posterior to anterior direction, which prevents shroud 220 from being removed in that same direction.
In other embodiments, some or all of the inserter 200 may remain with sensor control device 102 on the recipient. For example, in some embodiments the recipient can wear the inserter for the entire lifetime of the sensor control device 102. In those cases, inserter 200 can be configured with a lower profile so as to minimize its noticeability. In other embodiments, housing 201 is removed but shroud 22, sharp 210, and sharp support 205 remain with sensor control device 102. In yet other embodiments housing 201, sharp 210, and sharp support 205 are removed but shroud 220 remains with device 102.
Although not shown, to assist in guiding advancement and/or retraction of shroud 220, one or more elongate grooves, spaces, or channels can be implemented in which a projection or extension can slide. For example, the elongate groove, space, or channel can be present in shroud 220 with the longitudinal axis of that groove, space, or channel generally aligned with the direction of sliding motion, such that a projection or extension on the interior of housing 201 can be received into the groove, space, or channel and thereby guide the motion of shroud 220, preventing shroud 220 from rotating or tilting during advancement and/or retraction. Alternatively, the projection or extension can be present on shroud 220 and can be received in a groove, space, or channel in housing 201 with similar effect.
At 802, inserter 200 can be mated with a sensor control device 102. This can be performed during manufacturing or by the user after distribution thereto. At 804, in a state where shroud 220, sharp 211, and sensor projection 108 are extended from an anterior surface 105 of sensor control device 102 and also where sharp 211 and sensor projection 108 are covered by shroud 220, inserter 200 is positioned in proximity with the recipient such that anterior surface 221 of shroud 200 contacts the skin of the recipient. At 806, the operator of inserter 200 can advance housing 201 towards the skin of the recipient, thereby also advancing sensor control device 102. In embodiments where shroud 220 is held in position by biasing element 215 alone, then this movement causes shroud 220 to retract. In embodiments that include lock mechanism 234, then the operator first exerts sufficient (in some embodiments predetermined) pressure in the direction of the recipient's skin to cause lock mechanism 234 to release shroud 220, at which point advancement of housing 201 towards the recipient's skin causes shroud 220 to retract.
The retraction of shroud 220 exposes sharp 211 and sensor projection 108 from anterior surface 221 of shroud 220. Because anterior surface 221 is pressed against the recipient's skin, sharp 211 pierces or punctures the exterior surface of the recipient's skin and travels into the recipient's body by a desired amount, generally equal to the remaining distance between anterior surface 221 and surface 105 of sensor control device 102. This distance can be set such that sensor projection 108 is placed subcutaneously in contact with the ISF and/or blood, or such that sensor projection 108 (and optionally sharp 211) do not exceed the depth of the dermal layer (i.e., do not pass out of the dermal layer into deeper tissue). The retraction of shroud 220 can also cause biasing element 215 to compress.
At 808, continued advancement of housing 201 towards the recipient's skin causes shroud 220 to continue to retract and, upon the exertion of sufficient (and in some embodiments predetermined) pressure then lock mechanism 254 is released. The release of lock mechanism 254 can release sharp body 205 from its secured position, and expansive force exerted by biasing mechanism 215 causes sharp body 205 to retract at 810, thereby removing sharp 211 from the body of the recipient.
At 812, if any distance remains between anterior surface 221 of shroud 220 and anterior surface 105 of sensor control device 102, then housing 201 can be advanced until surfaces 221 and 105 are at least flush. At 814, adequate pressure is exerted to secure adhesive layer 105 of sensor control device 102 to the recipient's skin. In other embodiments, alternative or additional techniques to secure sensor control device 102 can be performed. At 816, all or part of inserter 200 can be optionally removed. At 818, sensor control device 102 can be used to monitor the analyte level of the recipient, and transmit its collected data to another electronic device such as reader 120.
Embodiments of In Vivo Monitoring Systems
For purpose of illustration, and not limitation, the embodiments of inserter 200 and sensor control device 102 described herein may be used in connection with the example analyte monitoring system 100 previously described with respect to
Reader device 120 can be a purpose specific device dedicated for use with analyte monitoring systems. Reader device 120 can also be a mobile communication device such as, for example, a Wi-Fi or internet enabled smartphone, tablet, or personal digital assistant (PDA). Reader device 120 can also be configured as a mobile smart wearable electronics assembly, such as an optical assembly that is worn over or adjacent to the user's eye (e.g., a smart glass or smart glasses, such as GOOGLE GLASSES). Other examples of wearable electronics include devices that are worn around or in the proximity of the user's wrist (e.g., a watch, etc.), neck (e.g., a necklace, etc.), head (e.g., a headband, hat, etc.), chest, or the like.
Reader device 120 is also capable of wired, wireless, or combined communication, either bidirectional or unidirectional, with either or all of: drug delivery device 160 over communication path (or link) 143, a local computer system 170 over communication path (or link) 141, and with a network 190 over communication path (or link) 142. The same wireless protocols described for link 140 can likewise be used for all or part of links 141, 142, and 143.
Reader device 120 can communicate with any number of entities through network 190, which can be part of a telecommunications network, such as a Wi-Fi network, a local area network (LAN), a wide area network (WAN), the internet, or other data network for uni-directional or bi-directional communication. A trusted computer system 180 can be accessed through network 190. In an alternative embodiment, communication paths 141 and 142 can be the same path which can include the network 190 and/or additional networks.
Variants of devices 102 and 120, as well as other components of an in vivo-based analyte monitoring system that are suitable for use with the system, device, and method embodiments set forth herein, are described in US Patent Application Publ. No. 2011/0213225 (the '225 Publication), which is incorporated by reference herein in its entirety for all purposes.
Sensor control device 102 can include a housing 103 containing in vivo analyte monitoring circuitry and a power source (not shown). The in vivo analyte monitoring circuitry can be electrically coupled with an analyte sensor 104 that can extend through an adhesive patch 105 and project away from housing 103. Adhesive patch 105 contains an adhesive layer (not shown) for attachment to a skin surface of the body of the user. Other forms of body attachment to the body may be used, in addition to or instead of adhesive.
Sensor 104 is adapted to be at least partially inserted into the body of the user, where it can make fluid contact with that user's body fluid (e.g., interstitial fluid (ISF), dermal fluid, or blood) and be used, along with the in vivo analyte monitoring circuitry, to measure analyte-related data of the user. Generally, sensor control device 102 and its components can be applied to the body with inserter 200 in one or more steps as described herein.
After activation, sensor control device 102 can wirelessly communicate the collected analyte data (such as, for example, data corresponding to monitored analyte level and/or monitored temperature data, and/or stored historical analyte related data) to reader device 120 where, in certain embodiments, it can be algorithmically processed into data representative of the analyte level of the user and then displayed to the user and/or otherwise incorporated into a diabetes monitoring regime.
Various embodiments disclosed herein relate to reader device 120, which can have a user interface including one or more of a display 122, keyboard, optional user interface component 121, and the like. Here, display 122 can output information to the user and/or accept an input from the user (e.g., if configured as a touch screen). Reader device 120 can include one or more optional user interface components 121, such as a button, actuator, touch sensitive switch, capacitive switch, pressure sensitive switch, jog wheel or the like. Reader device 120 can also include one or more data communication ports 123 for wired data communication with external devices such as local computer system 170. Reader device 120 may also include an integrated or attachable in vitro meter, including an in vitro test strip port (not shown) to receive an in vitro analyte test strip for performing in vitro blood analyte measurements.
Drug delivery device 160 is capable of injecting or infusing a drug, such as but not limited to insulin, into the body of the individual wearing sensor control device 102. Like reader device 120, drug delivery device 160 can include processing circuitry, non-transitory memory containing instructions executable by the processing circuitry, wireless or wired communication circuitry, and a user interface including one or more of a display, touchscreen, keyboard, an input button or instrument, and the like. Drug delivery device 160 can include a drug reservoir, a pump, an infusion tube, and an infusion cannula configured for at least partial implantation into the user's body. The pump can deliver insulin from the reservoir, through the tube, and then through the cannula into the user's body. Drug delivery device 160 can include instructions, executable by the processor, to control the pump and the amount of insulin delivered. These instructions can also cause calculation of insulin delivery amounts and durations (e.g., a bolus infusion and/or a basal infusion profile) based on analyte level measurements obtained directly or indirectly from sensor control device 102. The instructions can start drug delivery, stop drug delivery, increase or decrease the drug dosage, or modify a basal profile or a bolus dosage administered to the user. Embodiments of system 100 that include a drug delivery device 160 can be configured to operate as a semi-closed loop system or a fully closed loop system (sometimes referred to as an artificial pancreas).
Computer system 170 may be a personal or laptop computer, a tablet, or other suitable data processing device. Computer 170 can be either local (e.g., accessible via a direct wired connection such as USB) or remote to reader device 120 and can be (or include) software for data management and analysis and communication with the components in analyte monitoring system 100. Operation and use of computer 170 is further described in the '225 Publication incorporated herein by reference. Analyte monitoring system 100 can also be configured to operate with a data processing module (not shown), also as described in the incorporated '225 Publication.
Trusted computer system 180 can be used to perform authentication of sensor control device 102 and/or reader device 120, used to store confidential data received from devices 102 and/or 120, used to output confidential data to devices 102 and/or 120, or otherwise configured. Trusted computer system 180 can include one or more computers, servers, networks, databases, and the like. Trusted computer system 180 can be within the possession of the manufacturer or distributor of sensor control device 102, either physically or virtually through a secured connection, or can be maintained and operated by a different party (e.g., a third party).
The processing of data and the execution of software within system 100 can be performed by one or more processors of reader device 120, computer system 170, and/or sensor control device 102. For example, raw data measured by sensor 104 can be algorithmically processed into a value that represents the analyte level and that is readily suitable for display to the user, and this can occur in sensor control device 102, reader device 120, or computer system 170. This and any other information derived from the raw data can be displayed in any of the manners described above (with respect to display 122) on any display residing on any of sensor control device 102, reader device 120, or computer system 170. The information may be utilized by the user to determine any necessary corrective actions to ensure the analyte level remains within an acceptable and/or clinically safe range.
A non-transitory memory 953 is also included within ASIC 951 and can be shared by the various functional units present within ASIC 951, or can be distributed amongst two or more of them. Memory 953 can be volatile and/or non-volatile memory. In this embodiment, ASIC 951 is coupled with power source 960, which can be a coin cell battery, or the like. AFE 952 interfaces with in vivo analyte sensor 104 and receives measurement data therefrom and outputs the data to processor 956 in digital form, which in turn processes the data to arrive at the end-result analyte discrete and trend values, etc. This data can then be provided to communication circuitry 958 for sending, by way of antenna 961, to reader device 120 (not shown) where further processing can be performed by, e.g., the sensor interface application. It should be noted that the functional components of ASIC 951 can also be distributed amongst two or more discrete semiconductor chips.
Performance of the data processing functions within the electronics of the sensor control device 102 provides the flexibility for system 100 to schedule communication from sensor control device 102 to reader device 120, which in turn limits the number of unnecessary communications and can provide further power savings at sensor control device 102.
Information may be communicated from sensor control device 102 to reader device 120 automatically and/or continuously when the analyte information is available, or may not be communicated automatically and/or continuously, but rather stored or logged in a memory of sensor control device 102, e.g., for later output.
Data can be sent from sensor control device 102 to reader device 120 at the initiative of either sensor control device 102 or reader device 120. For example, in many example embodiments sensor control device 102 can communicate data periodically in an unprompted or broadcast-type fashion, such that an eligible reader device 120, if in range and in a listening state, can receive the communicated data (e.g., sensed analyte data). This is at the initiative of sensor control device 102 because reader device 120 does not have to send a request or other transmission that first prompts sensor control device 102 to communicate. Broadcasts can be performed, for example, using an active Wi-Fi, Bluetooth, or BTLE connection. The broadcasts can occur according to a schedule that is programmed within device 102 (e.g., about every 1 minute, about every 5 minutes, about every 10 minutes, or the like). Broadcasts can also occur in a random or pseudorandom fashion, such as whenever sensor control device 102 detects a change in the sensed analyte data. Further, broadcasts can occur in a repeated fashion regardless of whether each broadcast is actually received by a reader device 120.
System 100 can also be configured such that reader device 120 sends a transmission that prompts sensor control device 102 to communicate its data to reader device 120. This is generally referred to as “on-demand” data transfer. An on-demand data transfer can be initiated based on a schedule stored in the memory of reader device 120, or at the behest of the user via a user interface of reader device 120. For example, if the user wants to check his or her analyte level, the user could perform a scan of sensor control device 102 using an NFC, Bluetooth, BTLE, or Wi-Fi connection. Data exchange can be accomplished using broadcasts only, on-demand transfers only, or any combination thereof.
Accordingly, once a sensor control device 102 is placed on the body so that at least a portion of sensor 104 is in contact with the bodily fluid and electrically coupled to the electronics within device 102, sensor derived analyte information may be communicated in on-demand or unprompted (broadcast) fashion from the sensor control device 102 to a reader device 120. On-demand transfer can occur by first powering on reader device 120 (or it may be continually powered) and executing a software algorithm stored in and accessed from a memory of reader device 120 to generate one or more requests, commands, control signals, or data packets to send to sensor control device 102. The software algorithm executed under, for example, the control of processing hardware 206 of reader device 120 may include routines to detect the position of the sensor control device 102 relative to reader device 120 to initiate the transmission of the generated request command, control signal and/or data packet.
It should be noted that all features, elements, components, functions, and steps described with respect to any embodiment provided herein are intended to be freely combinable and substitutable with those from any other embodiment. If a certain feature, element, component, function, or step is described with respect to only one embodiment, then it should be understood that that feature, element, component, function, or step can be used with every other embodiment described herein unless explicitly stated otherwise. This paragraph therefore serves as antecedent basis and written support for the introduction of claims, at any time, that combine features, elements, components, functions, and steps from different embodiments, or that substitute features, elements, components, functions, and steps from one embodiment with those of another, even if the following description does not explicitly state, in a particular instance, that such combinations or substitutions are possible. It is explicitly acknowledged that express recitation of every possible combination and substitution is overly burdensome, especially given that the permissibility of each and every such combination and substitution will be readily recognized by those of ordinary skill in the art.
To the extent the embodiments disclosed herein include or operate in association with memory, storage, and/or computer readable media, then that memory, storage, and/or computer readable media are non-transitory. Accordingly, to the extent that memory, storage, and/or computer readable media are covered by one or more claims, then that memory, storage, and/or computer readable media is only non-transitory.
In many instances entities are described herein as being coupled to other entities. It should be understood that the terms “coupled” and “connected” (or any of their forms) are used interchangeably herein and, in both cases, are generic to the direct coupling of two entities and the indirect coupling of two entities. Where entities are shown as being directly coupled together, or described as coupled together without description of any intervening entity, it should be understood that those entities can be indirectly coupled together as well unless the context clearly dictates otherwise.
The subject matter described herein and in the accompanying figures is done so with sufficient detail and clarity to permit the inclusion of claims, at any time, in means-plus-function format pursuant to 35 U.S.C. section 112, part (f). However, a claim is to be interpreted as invoking this means-plus-function format only if the phrase “means for” is explicitly recited in that claim.
As used herein and in the appended claims, the singular forms “a”, “an”, and “the” include plural referents unless the context clearly dictates otherwise.
While the embodiments are susceptible to various modifications and alternative forms, specific examples thereof have been shown in the drawings and are herein described in detail. These embodiments are not to be limited to the particular form disclosed, but to the contrary, these embodiments are to cover all modifications, equivalents, and alternatives falling within the spirit of the disclosure. Furthermore, any features, functions, steps, or elements of the embodiments may be recited in or added to the claims, as well as negative limitations that define the scope of the claims by features, functions, steps, or elements that are not within that scope.
This application claims priority to, and the benefit of, U.S. Provisional Patent Application 62/161,787 filed May 14, 2015, the contents of which are incorporated by reference herein in its entirety and for all purposes.
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