Patent Application
20080269680
1. Field of the Invention
Embodiments of the present invention relate generally to systems and methods for limiting a presence of air bubbles in a fluidic medium filled into a reservoir.
2. Related Art
According to modern medical techniques, certain chronic diseases may be treated by delivering a medication or other substance to the body of a patient. For example, diabetes is a chronic disease that is commonly treated by delivering defined amounts of insulin to a patient at appropriate times. Traditionally, manually operated syringes and insulin pens have been employed for delivering insulin to a patient. More recently, modern systems have been designed to include programmable pumps for delivering controlled amounts of medication to a patient.
Pump type delivery devices have been configured in external devices, which connect to a patient, and have also been configured in implantable devices, which are implanted inside of the body of a patient. External pump type delivery devices include devices designed for use in a stationary location, such as a hospital, a clinic, or the like, and further include devices configured for ambulatory or portable use, such as devices that are designed to be carried by a patient, or the like. External pump type delivery devices may be connected in fluid flow communication to a patient or user, for example, through a suitable hollow tubing. The hollow tubing may be connected to a hollow needle that is designed to pierce the skin of the patient and to deliver a fluidic medium there-through. Alternatively, the hollow tubing may be connected directly to the patient as through a cannula, or the like.
Examples of some external pump type delivery devices are described in the following references: (i) Published PCT Application WO 01/70307 (PCT/US01/09139), entitled “Exchangeable Electronic Cards for Infusion Devices”; (ii) Published PCT Application WO 04/030716 (PCT/US2003/028769), entitled “Components and Methods for Patient Infusion Device”; (iii) Published PCT Application WO 04/030717 (PCT/US2003/029019), entitled “Dispenser Components and Methods for Infusion Device”; (iv) U.S. Patent Application Pub. No. 2005/0065760, entitled “Method for Advising Patients Concerning Doses Of Insulin”; and (v) U.S. Pat. No. 6,589,229, entitled “Wearable Self-Contained Drug Infusion Device”, each of which is incorporated by reference herein in its entirety.
As compared to syringes and insulin pens, pump type delivery devices can be significantly more convenient to a patient, in that doses of insulin may be calculated and delivered automatically to a patient at any time during the day or night. Furthermore, when used in conjunction with glucose sensors or monitors, insulin pumps may be automatically controlled to provide appropriate doses of a fluidic medium at appropriate times of need, based on sensed or monitored levels of blood glucose. As a result, pump type delivery devices have become an important aspect of modern medical treatments of various types of medical conditions, such as diabetes, and the like. As pump technologies improve and doctors and patients become more familiar with such devices, external medical infusion pump treatments are expected to increase in popularity and are expected to increase substantially in number over the next decade.
Various embodiments of the present invention are directed to limiting a presence of air bubbles in a fluidic medium filled into a reservoir. In various embodiments, a fluidic medium is forced from a vial into a reservoir. Also, in various embodiments, a vial is degassed prior to being used to fill a reservoir. In some embodiments, a filling process is automated and, in some embodiments, a membrane is located in a fluid flow path to trap air bubbles in a fluidic medium being filled into a reservoir.
A system in accordance with an embodiment of the present invention includes a vial. In various embodiments, the vial includes a diaphragm that separates a fillable volume of the vial from a pressurizable volume of the vial, where the diaphragm is inflatable to reduce the fillable volume in a case where a pressure within the pressurizable volume is increased. In some embodiments, the diaphragm is deflatable to increase the fillable volume in a case where the pressure within the pressurizable volume is decreased. Also, in some embodiments, the diaphragm is attached to an inner surface of the vial.
In various embodiments, the system further includes a pressure providing device for changing a pressure within the pressurizable volume. In some embodiments, the pressure providing device includes a syringe, and the syringe is connectable to the vial such that in a case where the syringe is filled with air and is connected to the vial and a plunger head within the syringe is advanced, a pressure within the pressurizable volume is increased so as to cause the diaphragm to inflate and reduce the fillable volume. Also, in some embodiments, the fillable volume is fillable with a fluidic medium.
In various embodiments, the system further includes a reservoir having an interior volume. In some embodiments, the diaphragm is deflatable to evacuate air from the interior volume of the reservoir into the fillable volume of the vial in a case where the interior volume of the reservoir and the fillable volume of the vial are connected by a needle and a vacuum is applied to the pressurizable volume of the vial. Also, in some embodiments, the diaphragm is inflatable to force a fluidic medium out of the fillable volume of the vial and into the interior volume of the reservoir in a case where the fillable volume of the vial is holding the fluidic medium and the fillable volume of the vial is connected to the interior volume of the reservoir by a needle and the pressure within the pressurizable volume is increased.
In various embodiments, the system further includes a membrane located in a flow path between the fillable volume of the vial and the interior volume of the reservoir for trapping bubbles in the fluidic medium in a case where the fluidic medium is transferred from the fillable volume of the vial to the interior volume of the reservoir. Also, in various embodiments, the vial further includes a first port for allowing a fluidic medium to flow out of the fillable volume of the vial and a second port for allowing a gas to be injected into the pressurizable volume of the vial.
A method in accordance with an embodiment of the present invention includes providing a fluid flow path between a fillable volume of a vial and an interior volume of a reservoir, and applying a pressure to a pressurizable volume of the vial so as to inflate a diaphragm to cause a fluidic medium to be expelled from the fillable volume of the vial into the interior volume of the reservoir. In various embodiments, the applying the pressure includes injecting at least one of a gas and a liquid from a pressure providing device into the pressurizable volume of the vial. In some embodiments, the pressure providing device includes a syringe, and the injecting includes injecting the at least one of the gas and the liquid from the syringe into the pressurizable volume of the vial by advancing a plunger head within the syringe.
In various embodiments, the method further includes applying a vacuum to the pressurizable volume of the vial so as to deflate the diaphragm to cause air to be evacuated from the interior volume of the reservoir into the fillable volume of the vial. In some embodiments, the applying the vacuum occurs before the applying the pressure. Also, in some embodiments, the method further includes trapping air bubbles in the fluidic medium by a membrane when the fluidic medium is transferred from the fillable volume of the vial to the interior volume of the reservoir.
A system in accordance with an embodiment of the present invention includes a vial having an interior volume for containing a fluidic medium, and a moveable element located within the vial, where the moveable element is advancable within the vial to reduce the interior volume. In various embodiments, the moveable element is retractable within the vial to increase the interior volume. In some embodiments, the vial has a barrel portion and a curved portion, the moveable element has a barrel portion with an outer contour that substantially matches an inner contour of the barrel portion of the vial, and the moveable element has a curved portion with an outer contour that substantially matches an inner contour of the curved portion of the vial. Also, in some embodiments, the system further includes a transfer guard for providing a fluid flow path from the vial to a reservoir, where the transfer guard includes a membrane in the fluid flow path for trapping air bubbles.
A method in accordance with an embodiment of the present invention includes providing a fluid flow path between an interior volume of a vial and an interior volume of a reservoir, and advancing a moveable element within the vial to cause a fluidic medium within the interior volume of the vial to be transferred to the interior volume of the reservoir through the fluid flow path. In various embodiments, the advancing includes advancing the moveable element within the vial until a curved portion of the moveable element contacts a curved portion of the vial. In some embodiments, the method further includes trapping air bubbles in the fluidic medium by a membrane located in the fluid flow path.
A degassing tool in accordance with an embodiment of the present invention includes a plunger housing having a port, a plunger head moveable within the plunger housing, a plunger arm connected to the plunger head, a first arm connected to the plunger arm, a first handle, a second handle, and a pivot member. The first handle and the second handle and the first arm are connected to the pivot member such that in a case where the first handle is pivoted toward the second handle, the first arm is pivoted and moves the plunger arm to cause the plunger head to retract within the plunger housing so as to increase a volume in the plunger housing between the plunger head and the port.
In various embodiments, the first handle and the second handle and the first arm are connected to the pivot member such that in a case where the first handle is pivoted away from the second handle, the first arm is pivoted and moves the plunger arm to cause the plunger head to advance within the plunger housing so as to decrease a volume in the plunger housing between the plunger head and the port. In some embodiments, the degassing tool further includes an insertion member, connected to the port of the plunger housing, for piercing a septum of a vial. Also, in some embodiments, the degassing tool further includes a second arm for holding a vial, where the second arm is connected to the second handle such that the second arm does not pivot with a pivoting of the pivot member.
A method of degassing a vial with a degassing tool in accordance with an embodiment of the present invention includes piercing a septum of the vial with an insertion member of the degassing tool that is connected to a port of a plunger housing of the degassing tool, and pivoting a first handle of the degassing tool toward a second handle of the degassing tool so as to pivot a first arm of the degassing tool to move a plunger arm of the degassing tool to cause a plunger head of the degassing tool to retract within the plunger housing so as to increase a volume in the plunger housing between the plunger head and the port. Gas is extracted from the vial and into the plunger housing through the insertion member when the volume in the plunger housing between the plunger head and the port is increased.
An apparatus in accordance with an embodiment of the present invention includes a transfer guard, a plunger housing, a plunger head, a plunger arm, and a pressure providing device. The transfer guard allows for providing a fluid flow path from a vial to a reservoir. The plunger housing is connected to the transfer guard. The plunger head is moveable within the plunger housing. The plunger arm has a first end connected to the plunger head and a second end that is connectable to a reservoir plunger arm that is connected to a reservoir plunger head within the reservoir. The pressure providing device allows for providing a pressure to the plunger head to move the plunger head within the plunger housing so as to move the plunger arm. When the plunger arm is connected to the reservoir plunger arm and the plunger arm is moved, the reservoir plunger arm moves so as to move the reservoir plunger head within the reservoir.
A method in accordance with an embodiment of the present invention allows for filling a reservoir from a vial using an apparatus. The apparatus includes a transfer guard, a plunger housing connected to the transfer guard, a plunger head within the plunger housing, a plunger arm connected to the plunger head, and a pressure providing device. In various embodiments, the method includes connecting the vial and the reservoir to the transfer guard to provide a fluid flow path from the vial to the reservoir, connecting the plunger arm of the apparatus to a reservoir plunger arm that is connected to a reservoir plunger head within the reservoir, and providing pressure by the pressure providing device to the plunger head within the plunger housing to move the plunger head within the plunger housing so as to move the plunger arm. When the plunger arm is connected to the reservoir plunger arm and the plunger arm is moved, the reservoir plunger arm moves so as to move the reservoir plunger head within the reservoir to allow a fluidic medium to flow from the vial to the reservoir through the fluid flow path.
An apparatus in accordance with an embodiment of the present invention includes a transfer guard, a pressure channel, a plunger head, and an air path member. The transfer guard allows for providing a fluid flow path from a vial to a reservoir. The pressure channel is connected to the transfer guard. The plunger head is moveable within the pressure channel. The air path member allows for providing an air path from the pressure channel to the vial. In a case where the vial and the reservoir are connected to the transfer guard and the plunger head is advanced within the pressure channel, air is forced from the pressure channel to the vial through the air path member to increase a pressure within the vial so as to force a fluidic medium from the vial to the reservoir through the fluid flow path.
A method in accordance with an embodiment of the present invention allows for filling a reservoir from a vial using an apparatus. The apparatus includes a transfer guard, a pressure channel connected to the transfer guard, a plunger head moveable within the pressure channel, and an air path member. In various embodiments, the method includes inserting an end of the air path member into the vial, connecting the vial and the reservoir to the transfer guard to provide a fluid flow path from the vial to the reservoir, and advancing the plunger head within the pressure channel to force air from the pressure channel into the vial through the air path member so as to increase a pressure within the vial to force a fluidic medium from the vial to the reservoir through the fluid flow path.
A transfer guard in accordance with an embodiment of the present invention includes a reservoir nest, a vial nest, a vacuum plunger nest, a first valve, a second valve, and a third valve. The reservoir nest allows for receiving a port of a reservoir. The vial nest allows for receiving a port of a vial. The vacuum plunger nest allows for receiving a port of a vacuum plunger. The first valve is moveable between at least an open position and a closed position for selectively opening and closing a fluid path to the reservoir nest. The second valve is moveable between at least an open position and a closed position for selectively opening and closing a fluid path to the vial nest. The third valve is moveable between at least an open position and a closed position for selectively opening and closing a fluid path to the vacuum plunger nest.
A method in accordance with an embodiment of the present invention includes placing a port of a reservoir in a reservoir nest of a transfer guard, placing a port of a vial in a vial nest of the transfer guard, placing a port of a vacuum plunger in a vacuum plunger nest of the transfer guard, closing a first valve of the transfer guard to close a fluid path to the reservoir nest, opening a second valve of the transfer guard to open a fluid path to the vial nest, opening a third valve of the transfer guard to open a fluid path to the vacuum plunger nest, and drawing a fluidic medium from the vial into the vacuum plunger through the transfer guard. In various embodiments, the method further includes closing the second valve to close the fluid path to the vial nest, opening the first valve to open the fluid path to the reservoir nest, and expelling the fluidic medium from the vacuum plunger into the reservoir through the transfer guard.
A system in accordance with an embodiment of the present invention includes a pressure source, a filter connectable to a port of a reservoir for filtering air bubbles from a fluidic medium, an air needle for providing an air path between the pressure source and a vial, and a fluid needle for providing a fluid path between the vial and the filter.
A method in accordance with an embodiment of the present invention includes connecting a filter to a port of a reservoir, providing an air path between a pressure source and a vial, providing a fluid path between the vial and the filter, and forcing air from the pressure source to the vial through the air path so as to cause a fluidic medium in the vial to be expelled from the vial to the reservoir through the fluid path and the filter.
A system in accordance with an embodiment of the present invention includes a vial, an air sack, an air line, a one-way valve, and a drive mechanism. The vial has an interior volume for containing a fluidic medium. The air sack allows for holding air. The air line is connected between the air sack and the interior volume of the vial. The one-way valve is configured to allow air to pass from the air sack to the interior volume of the vial through the air line when the air sack is compressed. The drive mechanism is controllable to compress the air sack. A system in accordance with another embodiment of the present invention includes a reservoir sack, a one-way valve, and a pressure sack. The reservoir sack allows for containing a fluidic medium, and the reservoir sack has an outlet path. The pressure sack allows for forcing air through the one-way valve and into the reservoir sack so as to cause the fluidic medium to be expelled from the reservoir sack through the outlet path.
A system in accordance with an embodiment of the present invention includes a reservoir, a plunger head, a plunger rod, and a needle. The reservoir has a septum. The plunger head includes a plunger head septum. The plunger rod is connected to the plunger head, and the plunger rod includes a pressurized vessel that contains air under pressure. The needle has a first end for piercing a septum of a vial, and has a second end for piercing the septum of the reservoir and the plunger head septum so as to provide an air path between the pressurized vessel in the plunger rod and the vial. A system in accordance with another embodiment of the present invention includes a reservoir, a plunger head, a plunger head septum, and a plunger rod. The plunger head is moveable within the reservoir, and the plunger head has a channel from a first surface of the plunger head to a second surface of the plunger head. The plunger head septum is located within the channel of the plunger head. The plunger rod is connected to the plunger head, and the plunger rod has a hollow interior for allowing a needle to pass within the plunger rod and through the plunger head septum.
In some embodiments, the system 10, delivery device 12, sensing device 14, CCD 16, and computer 18 may be similar to those described in the following U.S. Patent Applications that were assigned to the assignee of the present invention, however, there may be different reservoir and/or plunger configurations such as described herein, where each of the following patent applications is incorporated herein by reference in its entirety: (i) U.S. patent application Ser. No. 11/211,095, filed Aug. 23, 2005, “Infusion Device And Method With Disposable Portion”; (ii) U.S. patent application Ser. No. 11/515,225, filed Sep. 1, 2006, “Infusion Medium Delivery Device And Method With Drive Device For Driving Plunger In Reservoir”; (iii) U.S. patent application Ser. No. 11/588,875, filed Oct. 27, 2006, “Systems And Methods Allowing For Reservoir Filling And Infusion Medium Delivery”; (iv) U.S. patent application Ser. No. 11/588,832, filed Oct. 27, 2006, “Infusion Medium Delivery Device And Method With Drive Device For Driving Plunger In Reservoir”; (v) U.S. patent application Ser. No. 11/588,847, filed Oct. 27, 2006, “Infusion Medium Delivery Device And Method With Compressible Or Curved Reservoir Or Conduit”; (vi) U.S. patent application Ser. No. 11/589,323, filed Oct. 27, 2006, “Infusion Pumps And Methods And Delivery Devices And Methods With Same”; (vii) U.S. patent application Ser. No. 11/602,173, filed Nov. 20, 2006, “Systems And Methods Allowing For Reservoir Filling And Infusion Medium Delivery”; (viii) U.S. patent application Ser. No. 11/602,052, filed Nov. 20, 2006, “Systems And Methods Allowing For Reservoir Filling And Infusion Medium Delivery”; (ix) U.S. patent application Ser. No. 11/602,428, filed Nov. 20, 2006, “Systems And Methods Allowing For Reservoir Filling And Infusion Medium Delivery”; (x) U.S. patent application Ser. No. 11/602,113, filed Nov. 20, 2006, “Systems And Methods Allowing For Reservoir Filling And Infusion Medium Delivery”; (xi) U.S. patent application Ser. No. 11/604,171, filed Nov. 22, 2006, “Infusion Medium Delivery Device And Method With Drive Device For Driving Plunger In Reservoir”; (xii) U.S. patent application Ser. No. 11/604,172, filed Nov. 22, 2006, “Infusion Medium Delivery Device And Method With Drive Device For Driving Plunger In Reservoir”; (xiii) U.S. patent application Ser. No. 11/606,703, filed Nov. 30, 2006, “Infusion Pumps And Methods And Delivery Devices And Methods With Same”; (xiv) U.S. patent application Ser. No. 11/606,836, filed Nov. 30, 2006, “Infusion Pumps And Methods And Delivery Devices And Methods With Same”; (xv) U.S. patent application Ser. No. 11/645,993, filed Dec. 26, 2006, “Infusion Medium Delivery Device And Method With Compressible Or Curved Reservoir Or Conduit”; (xvi) U.S. patent application Ser. No. 11/646,052, filed Dec. 26, 2006, “Infusion Medium Delivery System, Device And Method With Needle Inserter And Needle Inserter Device And Method”; (xvii) U.S. patent application Ser. No. 11/645,435, filed Dec. 26, 2006, “Infusion Medium Delivery System, Device And Method With Needle Inserter And Needle Inserter Device And Method”; (xviii) U.S. patent application Ser. No. 11/646,000, filed Dec. 26, 2006, “Infusion Medium Delivery System, Device And Method With Needle Inserter And Needle Inserter Device And Method”; (xix) U.S. patent application Ser. No. 11/759,725, filed Jun. 7, 2007, “Infusion Medium Delivery Device And Method With Drive Device For Driving Plunger In Reservoir”; (xx) U.S. patent application Ser. No. 11/636,384, filed Dec. 8, 2006, “Infusion Medium Delivery Device And Method With Compressible Or Curved Reservoir Or Conduit”; and (xxi) U.S. patent application Ser. No. 11/645,972, filed Dec. 26, 2006, “Infusion Medium Delivery System, Device And Method With Needle Inserter And Needle Inserter Device And Method”. In other embodiments, the system 10, delivery device 12, sensing device 14, CCD 16, and computer 18 may have other suitable configurations.
The delivery device 12 is configured to deliver a fluidic medium to the body 5 of the user 7. In various embodiments, the fluidic medium includes a liquid, a fluid, a gel, or the like. In some embodiments, the fluidic medium includes a medicine or a drug for treating a disease or a medical condition. For example, the fluidic medium may include insulin for treating diabetes, or may include a drug for treating pain, cancer, a pulmonary disorder, HIV, or the like. In some embodiments, the fluidic medium includes a nutritional supplement, a dye, a tracing medium, a saline medium, a hydration medium, or the like.
The sensing device 14 includes a sensor, a monitor, or the like, for providing sensor data or monitor data. In various embodiments, the sensing device 14 may be configured to sense a condition of the user 7. For example, the sensing device 14 may include electronics and enzymes reactive to a biological condition, such as a blood glucose level, or the like, of the user 7. In various embodiments, the sensing device 14 may be secured to the body 5 of the user 7 or embedded in the body 5 of the user 7 at a location that is remote from the location at which the delivery device 12 is secured to the body 5 of the user 7. In various other embodiments, the sensing device 14 may be incorporated within the delivery device 12.
In further embodiments, the sensing device 14 and/or the delivery device 12 may utilize a closed-loop system. Examples of sensing devices and/or delivery devices utilizing closed-loop systems may be found at, but are not limited to, the following references: (i) U.S. Pat. No. 6,088,608, entitled “Electrochemical Sensor And Integrity Tests Therefor”; (ii) U.S. Pat. No. 6,119,028, entitled “Implantable Enzyme-Based Monitoring Systems Having Improved Longevity Due To Improved Exterior Surfaces”; (iii) U.S. Pat. No. 6,589,229, entitled “Implantable Enzyme-Based Monitoring Systems Adapted for Long Term Use”; (iv) U.S. Pat. No. 6,740,072, entitled “System And Method For Providing Closed Loop Infusion Formulation Delivery”; (v) U.S. Pat. No. 6,827,702, entitled “Safety Limits For Closed-Loop Infusion Pump Control”; (vi) U.S. Pat. No. 7,323,142, entitled “Sensor Substrate And Method Of Fabricating Same”; (vii) U.S. patent application Ser. No. 09/360,342, filed Jul. 22, 1999, entitled “Substrate Sensor”; and (viii) U.S. Provisional Patent Application Ser. No. 60/318,060, filed Sep. 7, 2001, entitled “Sensing Apparatus and Process”, all of which are incorporated herein by reference in their entirety.
In such embodiments, the sensing device 14 may be configured to sense a condition of the user 7, such as, but not limited to, blood glucose level, or the like. The delivery device 12 may be configured to deliver fluidic media in response to the condition sensed by the sensing device 14. In turn, the sensing device 14 may continue to sense a new condition of the user 7, allowing the delivery device 12 to deliver fluidic media continuously in response to the new condition sensed by the sensing device 14 indefinitely. In other embodiments, the sensing device 14 and/or the delivery device 12 may be configured to utilize the closed-loop system only for a portion of the day, for example only when the user 7 is asleep or awake.
Each of the delivery device 12, the sensing device 14, the CCD 16, and the computer 18 may include transmitter, receiver, or transceiver electronics that allow for communication with other components of the system 10. The sensing device 14 may be configured to transmit sensor data or monitor data to the delivery device 12. The sensing device 14 may also be configured to communicate with the CCD 16. The delivery device 12 may include electronics and software that are configured to analyze sensor data and to deliver the fluidic medium to the body 5 of the user 7 based on the sensor data and/or preprogrammed delivery routines.
The CCD 16 and the computer 18 may include electronics and other components configured to perform processing, delivery routine storage, and to control the delivery device 12. By including control functions in the CCD 16 and/or the computer 18, the delivery device 12 may be made with more simplified electronics. However, in some embodiments, the delivery device 12 may include all control functions, and may operate without the CCD 16 and the computer 18. In various embodiments, the CCD 16 may be a portable electronic device. Also, in various embodiments, the delivery device 12 and/or the sensing device 14 may be configured to transmit data to the CCD 16 and/or the computer 18 for display or processing of the data by the CCD 16 and/or the computer 18. Examples of the types of communications and/or control capabilities, as well as device feature sets and/or program options may be found in the following references: (i) U.S. patent application Ser. No. 10/445,477, filed May 27, 2003, entitled “External Infusion Device with Remote Programming, Bolus Estimator and/or Vibration Alarm Capabilities”; (ii) U.S. patent application Ser. No. 10/429,385, filed May 5, 2003, entitled “Handheld Personal Data Assistant (PDA) with a Medical Device and Method of Using the Same”; and (iii) U.S. patent application Ser. No. 09/813,660, filed Mar. 21, 2001, entitled “Control Tabs for Infusion Devices and Methods of Using the Same”, all of which are incorporated herein by reference in their entirety.
Elements of the delivery device 12 that ordinarily contact the body of a user or that ordinarily contact a fluidic medium during operation of the delivery device 12 may be considered as a disposable portion of the delivery device 12. For example, a disposable portion of the delivery device 12 may include the disposable housing 20 and the reservoir 40. The disposable portion of the delivery device 12 may be recommended for disposal after a specified number of uses.
On the other hand, elements of the delivery device 12 that do not ordinarily contact the body of the user or the fluidic medium during operation of the delivery device 12 may be considered as a durable portion of the delivery device 12. For example, a durable portion of the delivery device 12 may include the durable housing 30, electronics (not shown in
In various embodiments, the disposable housing 20 supports the reservoir 40 and has a bottom surface (facing downward and into the page in
In other embodiments, the disposable housing 20 and/or the remaining portions of the delivery device 12 may be worn or otherwise attached on or underneath clothing of the user. Similarly, the delivery device 12 may be supported by any suitable manner, such as, but not limited to, on a belt, in a pocket, and the like. Representative examples of such delivery devices 12 may include, but are not limited to, the MiniMed® Paradigm® 522 Insulin Pump, MiniMed® Paradigm® 722 Insulin Pump, MiniMed® Paradigm® 515 Insulin Pump, MiniMed® Paradigm® 715 Insulin Pump, MiniMed® Paradigm® 512R Insulin Pump, MiniMed® Paradigm® 712R Insulin Pump, MiniMed® 508 Insulin Pump, MiniMed® 508R Insulin Pump, and any other derivatives thereof.
The reservoir 40 is configured for containing or holding a fluidic medium, such as, but not limited to insulin. In various embodiments, the reservoir 40 includes a hollow interior volume for receiving the fluidic medium, such as, but not limited to, a cylinder-shaped volume, a tubular-shaped volume, or the like. In some embodiments, the reservoir 40 may be provided as a cartridge or canister for containing a fluidic medium. In various embodiments, the reservoir 40 is able to be refilled with a fluidic medium. In further embodiments, the reservoir 40 is pre-filled with a fluidic medium.
The reservoir 40 may be supported by the disposable housing 20 in any suitable manner. For example, the disposable housing 20 may be provided with projections or struts (not shown), or a trough feature (not shown), for holding the reservoir 40. In some embodiments, the reservoir 40 may be supported by the disposable housing 20 in a manner that allows the reservoir 40 to be removed from the disposable housing 20 and replaced with another reservoir. Alternatively, or in addition, the reservoir 40 may be secured to the disposable housing 20 by a suitable adhesive, a strap, or other coupling structure.
In various embodiments, the reservoir 40 includes a port 41 for allowing a fluidic medium to flow into and/or flow out of the interior volume of the reservoir 40. In some embodiments, the infusion path 50 includes a connector 56, a tube 54, and a needle apparatus 52. The connector 56 of the infusion path 50 may be connectable to the port 41 of the reservoir 40. In various embodiments, the disposable housing 20 is configured with an opening near the port 41 of the reservoir 40 for allowing the connector 56 of the infusion path 50 to be selectively connected to and disconnected from the port 41 of the reservoir 40.
In various embodiments, the port 41 of the reservoir 40 is covered with or supports a septum (not shown in
The durable housing 30 of the delivery device 12 in accordance with various embodiments of the present invention includes a housing shell configured to mate with and secure to the disposable housing 20. The durable housing 30 and the disposable housing 20 may be provided with correspondingly shaped grooves, notches, tabs, or other suitable features, that allow the two parts to easily connect together, by manually pressing the two housings together, by twist or threaded connection, or other suitable manner of connecting the parts that is well known in the mechanical arts. In various embodiments, the durable housing 30 and the disposable housing 20 may be connected to each other using a twist action. The durable housing 30 and the disposable housing 20 may be configured to be separable from each other when a sufficient force is applied to disconnect the two housings from each other. For example, in some embodiments the disposable housing 20 and the durable housing 30 may be snapped together by friction fitting. In various embodiments, a suitable seal, such as an o-ring seal, may be placed along a peripheral edge of the durable housing 30 and/or the disposable housing 20, so as to provide a seal against water entering between the durable housing 30 and the disposable housing 20.
The durable housing 30 of the delivery device 12 may support a drive device (not shown in
In various embodiments, the durable housing 30 and the disposable housing 20 may be made of suitably rigid materials that maintain their shape, yet provide sufficient flexibility and resilience to effectively connect together and disconnect, as described above. The material of the disposable housing 20 may be selected for suitable compatibility with skin. For example, the disposable housing 20 and the durable housing 30 of the delivery device 12 may be made of any suitable plastic, metal, composite material, or the like. The disposable housing 20 may be made of the same type of material or a different material relative to the durable housing 30. In some embodiments, the disposable housing 20 and the durable housing 30 may be manufactured by injection molding or other molding processes, machining processes, or combinations thereof.
For example, the disposable housing 20 may be made of a relatively flexible material, such as a flexible silicone, plastic, rubber, synthetic rubber, or the like. By forming the disposable housing 20 of a material capable of flexing with the skin of a user, a greater level of user comfort may be achieved when the disposable housing 20 is secured to the skin of the user. Also, a flexible disposable housing 20 may result in an increase in site options on the body of the user at which the disposable housing 20 may be secured.
In the embodiment illustrated in
In some embodiments, the sensor 15 may include a continuous glucose sensor. The continuous glucose sensor may be implantable within the body of the user. In other embodiments, the continuous glucose sensor may be located externally, for example on the skin of the user, or attached to clothing of the user. In such embodiments, fluid may be drawn continually from the user and sensed by the continuous glucose sensor. In various embodiments, the continuous glucose sensor may be configured to sense and/or communicate with the CCD 16 continuously. In other embodiments, the continuous glucose sensor may be configured to sense and/or communicate with the CCD 16 intermittently, for example sense glucose levels and transmit information every few minutes. In various embodiments, the continuous glucose sensor may utilize glucose oxidase.
The sensor 15 may be an external sensor that secures to the skin of a user or, in other embodiments, may be an implantable sensor that is located in an implant site within the body of the user. In further alternatives, the sensor may be included with as a part or along side the infusion cannula and/or needle, such as for example as shown in U.S. patent application Ser. No. 11/149,119, filed Jun. 8, 2005, entitled “Dual Insertion Set”, which is incorporated herein by reference in its entirety. In the illustrated example of
While the embodiment shown in
As described above, by separating disposable elements of the delivery device 12 from durable elements, the disposable elements may be arranged on the disposable housing 20, while durable elements may be arranged within a separable durable housing 30. In this regard, after a prescribed number of uses of the delivery device 12, the disposable housing 20 may be separated from the durable housing 30, so that the disposable housing 20 may be disposed of in a proper manner. The durable housing 30 may then be mated with a new (un-used) disposable housing 20 for further delivery operation with a user.
The base 21 of the disposable housing 20 is configured to be secured to the body of a user. The reservoir retaining portion 24 of the disposable housing 20 is configured to house the reservoir 40. The reservoir retaining portion 24 of the disposable housing 20 may be configured to have an opening to allow for the port 41 of the reservoir 40 to be accessed from outside of the reservoir retaining portion 24 while the reservoir 40 is housed in the reservoir retaining portion 24. The durable housing 30 may be configured to be attachable to and detachable from the base 21 of the disposable housing 20. The delivery device 12 in the embodiment illustrated in
The infusion path 50 in accordance with the embodiment of the present invention illustrated in
Alternatively, the needle 58 may be extended through a hollow cannula (not shown in
In various embodiments, the reservoir 40 is housed within the reservoir retaining portion 24 of the disposable housing 20, and the reservoir 40 is configured to hold a fluidic medium. Also, in various embodiments, the plunger head 70 is disposed at least partially within the reservoir 40 and is moveable within the reservoir 40 to allow the fluidic medium to fill into the reservoir 40 and to force the fluidic medium out of the reservoir 40. In some embodiments, the plunger arm 60 is connected to or is connectable to the plunger head 70. Also, in some embodiments, a portion of the plunger arm 60 extends to outside of the reservoir retaining portion 24 of the disposable housing 20. In various embodiments, the plunger arm 60 has a mating portion for mating with the drive device linkage portion 82 of the drive device 80 (refer to
When the durable housing 30 and the disposable housing 20 are fitted together with the drive device linkage portion 82 engaging or mating with the plunger arm 60, the motor 84 may be controlled to drive the drive device linkage portion 82 and, thus, move the plunger arm 60 to cause the plunger head 70 to move within the reservoir 40. When the interior volume of the reservoir 40 is filled with a fluidic medium and an infusion path is provided from the reservoir 40 to the body of a user, the plunger head 70 may be moved within the reservoir 40 to force the fluidic medium from the reservoir 40 and into the infusion path, so as to deliver the fluidic medium to the body of the user.
In various embodiments, once the reservoir 40 has been sufficiently emptied or otherwise requires replacement, a user may simply remove the durable housing 30 from the disposable housing 20, and replace the disposable portion 9, including the reservoir 40, with a new disposable portion having a new reservoir. The durable housing 30 may be connected to the new disposable housing of the new disposable portion, and the delivery device including the new disposable portion may be secured to the skin of a user, or otherwise attached to the user. In various other embodiments, rather than replacing the entire disposable portion 9 every time the reservoir 40 is emptied, the reservoir 40 may be refilled with a fluidic medium. In some embodiments, the reservoir 40 may be refilled while remaining within the reservoir retaining portion 24 (refer to
With reference to
In various embodiments, the reservoir status circuitry is further configured to store data to the reservoir circuitry after at least some of the contents of the reservoir 40 have been transferred out of the reservoir 40, so as to update information in the reservoir circuitry related to an amount of contents still remaining in the reservoir 40. In some embodiments, the reservoir status circuitry is configured to store data to the reservoir circuitry, so as to update information in the reservoir circuitry related to an amount of contents still remaining in the reservoir 40, when the reservoir 40 is inserted into the disposable portion 9. In some embodiments, the delivery device 12 includes the reservoir status circuitry (not shown) and the reservoir 40 includes the reservoir circuitry (not shown), and the reservoir status circuitry selectively inhibits use of the delivery device 12 or selectively provides a warning signal based on information read by the reservoir status circuitry from the reservoir circuitry.
The vial 150 includes a diaphragm 153 that is connected to an inner surface 151 of the vial 150. The inner surface 151 of the vial 150 and an outer surface of the diaphragm 153 define a fillable volume 190 of the vial 150 that is able to contain a fluidic medium. In various embodiments, the diaphragm 153 comprises rubber, plastic, or the like, and is flexible. In some embodiments, the vial 150 further includes a septum 154 that is able to be pierced by a needle, such that a fluidic medium is able to be expelled from the vial 150 through the needle once the needle has pierced the septum 154.
In various embodiments, the vial 150 includes a bottom surface 152 with an opening for allowing air or other motivation to enter into a pressurizable volume 191 of the vial 150 on an opposite side of the diaphragm 153 from a side of the diaphragm 153 that is in contact with the fluidic medium in the vial 150. The diaphragm 153 separates the fillable volume 190 of the vial 150 from the pressurizable volume 191 of the vial 150. The diaphragm 153 is inflatable to reduce the fillable volume 190 in a case where a pressure within the pressurizable volume 191 is increased. In various embodiments, the diaphragm 153 is deflatable to increase the fillable volume 190 in a case where the pressure within the pressurizable volume 191 is decreased.
The transfer guard 140 includes one or more needles 142 for providing a fluid path from an interior volume of the vial 150 to an interior volume of the reservoir 110. In various embodiments, the transfer guard 140 includes walls that help to shield the one or more needles 142 from contact with a hand of a user when the user is connecting the vial 150 and the reservoir 110 with the transfer guard 140. The one or more needles 142 of the transfer guard 140 are able to pierce the septum 154 of the vial 150 and the septum 118 of the reservoir 110, so as to provide a fluid path from the vial 150 to the reservoir 110. In various embodiments, a membrane 147 is incorporated into the fluid flow path in the transfer guard 140 to trap air bubbles as a fluidic medium passes along the fluid flow path from the vial 150 to the reservoir 110.
The pressure providing device 160 may include, for example, a syringe, or the like, for forcing air or other motivation, such as a fluid, through the opening in the bottom surface 152 of the vial 150 and into the pressurizable volume 191. In various other embodiments, the pressure providing device 160 may include, for example, a pump, or the like for providing pressure. The pressure providing device 160 is connected to the vial 150 at a connection point 170 by, for example, an air tight connector, a screw connection, a clamp, or the like. In various embodiments, the pressure providing device 160 allows for changing a pressure within the pressurizable volume 191.
In
In some embodiments, the diaphragm 153 is deflatable to evacuate air from an interior volume of the reservoir 110 into the fillable volume 190 of the vial 150 in a case where the interior volume of the reservoir 110 and the fillable volume 190 of the vial 150 are connected by the one or more needles 142 and a vacuum is applied to the pressurizable volume 191 of the vial. Also, in some embodiments, the diaphragm 153 is inflatable to force a fluidic medium out of the fillable volume 190 of the vial 150 and into the interior volume of the reservoir 110 in a case where the fillable volume 190 of the vial 150 is holding the fluidic medium and the fillable volume 190 of the vial 150 is connected to the interior volume of the reservoir 110 by the one or more needles 142 and the pressure within the pressurizable volume 191 is increased.
A method in accordance with an embodiment of the present invention allows for filling the reservoir 110 in the system 100. The method includes connecting the pressure providing device 160 to one end of the vial 150 and connecting another end of the vial 150 to the reservoir 110 using the transfer guard 140. An example of such a connected structure is illustrated in
The diaphragm 153 within the vial 150 is flexible, so the diaphragm 153 expands into the fillable volume 190 when a pressure is applied to the diaphragm 153 by the pressure providing device 160.
Thus, embodiments of the present invention provide a flexible diaphragm in a bottom of a vial and allow for external pressure to be applied to the flexible diaphragm so as to force a fluidic medium, such as insulin, or the like, into a reservoir. In various embodiments, the membrane 147 is incorporated into the fluid flow path to trap air bubbles in a fluidic medium. In some embodiments of the method using the system 100, an initial vacuum is applied to the vial 150 to evacuate air in a dead space of the reservoir 110 into the vial 150 prior to filling the reservoir 110.
In various embodiments, S12 includes S13 in which at least one of a gas and a liquid in injected from a pressure providing device into the pressurizable volume of the vial. Also, in various embodiments, S13 includes S14 in which the at least one of the gas and the liquid is injected from a syringe into the pressurizable volume of the vial by advancing a plunger head within the syringe. In S15, air bubbles are trapped in the fluidic medium by a membrane when the fluidic medium is transferred from the fillable volume of the vial to the interior volume of the reservoir, and the method then ends in S16.
The moveable element 270 is located within the vial 250 and is moveable within the vial 250 to expand or contract an interior volume of the vial 250. An inner surface 251 of the vial 250 and a surface of the moveable element 270 define an interior volume of the vial 250 that is able to contain a fluidic medium. In various embodiments, the moveable element 270 comprises rubber, plastic, or the like. Also, in various embodiments, the moveable element 270 comprises a plunger, or the like. In some embodiments, the vial 250 further includes a septum 254 that is able to be pierced by a needle, such that a fluidic medium is able to be expelled from the vial 250 through the needle once the needle has pierced the septum 254.
The moveable element 270 is able to move within the vial 250 when a pressure is applied to the moveable element 270. In various embodiments, the moveable element includes a barrel portion 271 and a curved portion 272, where a contour of an outer surface of the barrel portion 271 is substantially the same as a contour of the inner surface 251 of a barrel portion 255 of the vial 250, and where a contour of an outer surface of the curved portion 272 is substantially the same as a contour of a curved portion 256 of the vial 250. Also, in various embodiments, the moveable element 270 includes one or more seals 273, such as o-rings or the like, that surround the barrel portion 271 of the moveable element 270 and that are in contact with the inner surface 251 of the barrel portion 255 of the vial 250 when the moveable element 270 is within the vial 250. The moveable element 270 is advanceable within the vial 250 to reduce the interior volume of the vial 250. Also, in various embodiments, the moveable element 270 is retractable within the vial 250 to increase the interior volume of the vial 250.
The transfer guard 240 includes one or more needles 242 for providing a fluid path from an interior volume of the vial 250 to an interior volume of the reservoir 210. In various embodiments, the transfer guard 240 includes walls that help to shield the one or more needles 242 from contact with a hand of a user when the user is connecting the vial 250 and the reservoir 210 with the transfer guard 240. The one or more needles 242 of the transfer guard 240 are able to pierce the septum 254 of the vial 250 and the septum 218 of the reservoir 210, so as to provide a fluid path from the vial 250 to the reservoir 210. In various embodiments, the transfer guard 240 may include a membrane 241 that is incorporated into the fluid flow path of the transfer guard 240 to trap air bubbles as a fluidic medium passes along the fluid flow path from the vial 250 to the reservoir 210.
A method in accordance with an embodiment of the present invention allows for filling the reservoir 210 in the system 200. The method includes connecting the vial 250 to the reservoir 210 using the transfer guard 240. An example of such a connected structure is illustrated in
When a pressure is applied to the moveable element 270 to advance the moveable element 270 within the vial 250, the fluidic medium within the vial 250 is forced through the one or more needles 242 and into the reservoir 210.
The first handle 302, the second handle 304, the first arm 308, and the second arm 306 are connected together by the pivot member 310. In various embodiments, the first handle 302, the pivot member 310, and the first arm 308 are formed as a single unit, and the second handle 304 and the second arm 306 are formed as a single unit. The first handle 302 is able to pivot toward and away from the second handle 304. The second arm 306 may have a cavity for surrounding a neck of a vial. The holding arm 312 extends from the second arm 306 and holds the plunger housing 324 between the first arm 308 and the second arm 306. The plunger head 320 is connected to the plunger arm 322 and the plunger head 320 is able to slide within the plunger housing 324. The insertion member 350 may be, for example, a needle, and is connected to an output port of the plunger housing 324. The plunger arm 322 is connected to the first arm 308.
The degassing tool 301 is configured such that when the first handle 302 is pivoted away from the second handle 304, the first arm 308 is pivoted such that the plunger arm 322 causes the plunger head 320 to advance within the plunger housing 324 to reduce a volume in the plunger housing 324 between the plunger head 320 and the output port to the insertion member 350. The degassing tool 301 is also configured such that when the first handle 302 is pivoted toward the second handle 304, the first arm 308 is pivoted such that the plunger arm 322 causes the plunger head 320 to retract within the plunger housing 324 to increase a volume in the plunger housing 324 between the plunger head 320 and the output port to the insertion member 350.
A method in accordance with the present invention allows for degassing the vial 330 using the degassing tool 301. In a step of the method, the first handle 302 of the degassing tool 301 is pivoted away from the second handle 304, which causes the first arm 308 to push on the plunger arm 322 and, thus, advance the plunger head 320 within the plunger housing 324. In another step of the method, the insertion member 350 is inserted through the septum 332 of the vial 330 and into the headspace 344 of the vial 330 above the fluidic medium 342 within the vial 330. An example of such a connection of the degassing tool 301 and the vial 330 is illustrated in
In yet another step of the method, the first handle 302 of the degassing tool 301 is pivoted toward the second handle 304, which causes the first arm 308 to pull on the plunger arm 322 and, thus, retract the plunger head 320 within the plunger housing 324.
The pressurized vessel 432 contains air under pressure and is located within the plunger rod 430 and the handle 434. The long needle 445 penetrates the plunger head septum 422, the reservoir septum 414, and the vial septum 452 to provide an air path between the pressurized vessel 432 and the headspace 456 in the vial 450. The hydrophobic membrane 448 restricts fluid and vapor from passing through the long needle 445. The first short needle 442, the filter 447, and the second short needle 444 provide a fluid path from the vial 450 to the reservoir 410. Thus, air passes through the long needle 445 from the pressurized vessel 432 to the headspace 456 in the vial 450, and the fluidic medium 454 in the vial 450 is forced out of the vial 450 due to the pressure from the pressurized vessel 432, and the fluidic medium 454 flows from the vial 450 through the second short needle 444, the filter 447, and the first short needle 442 to the reservoir 410. The filter 447 allows for filtering air bubbles from the fluidic medium as the fluidic medium passes from the vial 450 to the reservoir 410. In various embodiments, the pressurized vessel 432 is contained entirely within the plunger rod 430.
The vial 1550 is able to remain upright during a filling processes when a fluidic medium is transferred from the vial 1550 to the reservoir 1510. One end of the needle 1572 is connected to the bellows 1570, and another end of the needle 1572 pierces the vial septum 1552 and is positioned in a headspace within the vial 1550. The long needle 1542 is positioned to run from a lower region of the vial 1550 through the vial septum 1552 and through the plunger arm 1530, and through the plunger head septum 1522 into the interior volume 1517 of the reservoir 1510. In various embodiments, the plunger head septum 1522 may be at an end of a channel through a center of the plunger head 1520. Thus, the long needle 1542 is able to pass from a backside of the plunger head 1520 and into the interior volume 1517 of the reservoir 1510. The short needle 1564 allows for venting air through the hydrophobic membrane 1562, and the hydrophobic membrane 1562 substantially prevents a loss of a fluidic medium through the short needle 1564 during a filling process.
During a filling process, the bellows 1570 is compressed to force air through the needle 1572 and into the vial 1550. An increase pressure in the vial 1550 due to the air from the bellows 1570 forces a fluidic medium from the vial 1550 up the long needle 1542 and into the interior volume 1517 of the reservoir 1510. In various embodiments, during the filling processes, the plunger head 1520 is held stationary, but the reservoir 1510 is allowed to move upward with respect to the plunger head 1520 so as to increase a volume of the interior volume 1517 and allow for a fluidic medium to flow into the interior volume 1517 from the vial 1550 when the bellows 1570 is compressed.
The stand 530 includes a connection structure, such as a transfer guard, or the like, for providing a fluid path from the vial 510 to the reservoir 520. The stand 530 includes a first needle 534, a second needle 532, an air filter 536, a plunger head 540, a pressure providing device 542, and a plunger arm 544 connected to the plunger head 540. The first needle 534 may be used to pierce the septum 512 of the vial 510, and the second needle 532 may be used to pierce the septum 529 of the reservoir 520, and the first needle 534 may be connected to the second needle 532 through the air filter 536. The air filter allows for removing dissolved air from a fluidic medium being transferred from the vial 510 to the reservoir 520.
The plunger head 540, the plunger arm 544, and the pressure providing device 542 allow for assisting with a filling of the reservoir 520. In various embodiments, the pressure providing device 542 comprises a spring, or the like, that is biased toward an expanded position. In various other embodiments, the pressure providing device 542 includes a canister with compressed air, where the compressed air may be released to provide a pressure. An end 546 of the plunger arm 544 of the stand 530 may be inserted into a receptacle 526 of the plunger arm 524, such that a movement of the plunger head 540 causes a movement of the plunger arm 544 that leads to a movement of the plunger arm 524 that causes a movement of the plunger head 522 within the reservoir 520.
A method in accordance with an embodiment of the present invention allows for using the stand 530 to assist in filling the reservoir 520 from the vial 510. In a first step of the method, the vial 510 and the reservoir 520 are connected to the stand 530. For example, the stand 530 may include a nest for the vial 510 and a nest for the reservoir 520. When the reservoir 520 is attached to the stand 530, the end 546 of the plunger arm 544 of the stand 530 is inserted into the receptacle 526 of the plunger arm 524. In a second step of the method, the pressure providing device 542 is caused to provide a pressure to the plunger head 540 so as to move the plunger head 540 to cause the plunger arm 544 to move, which causes the plunger arm 524 to move and, thus, causes the plunger head 522 to retract within the reservoir 520.
The transfer guard 640 includes a reservoir nest 641, a vial nest 642, a vacuum plunger nest 643, a first valve 644, a second valve 645, a third valve 646, a filter 647, a first needle 648, and a second needle 649. The reservoir nest 641 is configured to be connected to the reservoir 610, such that the first needle 648 is inserted into the interior volume of the reservoir 610. The vial nest 642 is configured to be connected to the vial 650, such that the second needle 649 is inserted into an interior volume of the vial 650. The vacuum plunger nest 643 is configured to be connected to the vacuum plunger 660. The first valve 644 allows for a fluidic medium to flow into the reservoir 610 when the first valve 644 is open, and prevents a fluidic medium from flowing into the reservoir 610 when the first valve 644 is closed. The second valve 645 allows for a fluidic medium to flow out of the vial 650 when the second valve 645 is open, and prevents a fluidic medium from flowing out of the vial 650 when the second valve 645 is closed. The third valve 646 allows for a fluidic medium to flow into and out of the vacuum plunger 660 when the third valve 646 is open, and prevents a fluidic medium from flowing into or out of the vacuum plunger 660 when the third valve 646 is closed. The filter 647 allows for filtering air from a fluidic medium.
A method in accordance with the present invention allows for filling the reservoir 610 using the transfer guard 640. In a step of the method, the reservoir nest 641 is connected to the reservoir 610, the vial nest 642 is connected to the vial 650, and the vacuum plunger nest 643 is connected to the vacuum plunger 660. Also, in an initial position, the plunger head 662 is depressed within the vacuum plunger 660, and the plunger head 620 is depressed within the reservoir 610. Moreover, in an initial state, the first valve 644, the second valve 645, and the third valve 646 are all closed. An example of the system 600 in such a state is illustrated in
In another step of the method, the second valve 645 and the third valve 646 are opened, and the handle 664 is pulled to cause the plunger head 662 to retract within a housing of the vacuum plunger 660.
In yet another step of the method, the second valve 645 is closed and the first valve 644 is opened, and the handle 664 is pushed to cause the plunger head 662 to advance within the housing of the vacuum plunger 660.
Therefore, embodiments of the present invention allow for incorporating a series of valves into a transfer guard and for using a hand operated vacuum plunger and a filter or membrane to filter out air bubbles. Moreover, embodiments of the present invention allow for a two step degassing process in which a first step involves vacuum aspiration and a second step involves pushing a fluidic medium across a filter. Thus, embodiments of the present invention allow for filling a reservoir by pushing a fluidic medium across a filter and into the reservoir. In some embodiments, cavitation is used to degas a fluidic medium.
During a filling operation with the system 700, the piston 762 is advanced within the pressure source 760 to force air through the air needle 742 and into the vial 750. The increased pressure in the vial 750 due to the pressure from the pressure source 760 causes a fluidic medium in the vial 750 to be expelled through the first fluid needle 744 and the second fluid needle 746 to the filter 740. The filter 740 filters air bubbles out of the fluidic medium, and then the fluidic medium fills into the interior volume of the reservoir 710. Thus, in various embodiments, a fluidic medium or solution, such as insulin, is forced across a filter during filling, and the fluidic medium is pushed into a reservoir rather than being pulled into the reservoir. Also, while the system 700 is illustrated as a multiple needle design with a first fluid needle 744 and a second fluid needle 746, it should be appreciated that, in various embodiments, more than two fluid needles may be used between the vial 750 and the filter 740 and that, in various other embodiments, a single fluid needle may be used between the vial 750 and the filter 740.
The drive shaft 1136 allows for compressing the air sack 1130 so as to cause air to be pushed through the one-way valve 1132 and through the air line 1134. One end of the fluid line 1122 is positioned within the fluidic medium 1114 in the vial 1110, and another end of the fluid line 1122 is connected to the filter 1124. The filter 1124 allows for filtering air bubbles out of a fluidic medium that passes from the fluid line 1122 to the insertion line 1126 through the filter 1124. During operation, the drive shaft 1136 compresses the bulb or air sack 1130 to force air into the vial 1110 through the air line 1134. The air that exits the air line 1134 in the vial 1110 is provided into the area 1116 that is above the fluidic medium 1114, so the air from the air line 1134 is provided into the vial 1110 without percolating through the fluidic medium 1114. An increase in pressure caused by air from the air line 1134 forces the fluidic medium 1114 through the fluid line 1122 to the filter 1124 and on to the insertion line 1126. In various embodiments, the insertion line 1126 is inserted into a reservoir (not shown in
The embodiments disclosed herein are to be considered in all respects as illustrative, and not restrictive of the invention. The present invention is in no way limited to the embodiments described above. Various modifications and changes may be made to the embodiments without departing from the spirit and scope of the invention. Various modifications and changes that come within the meaning and range of equivalency of the claims are intended to be within the scope of the invention.
Embodiments of the present invention relate to U.S. Provisional Application Ser. No. 60/927,032, filed Apr. 30, 2007, entitled “Needle Inserting, Reservoir Filling, Bubble Management, Fluid Flow Connections and Infusion Medium Delivery Systems and Methods with Same”, the entire contents of which are incorporated by reference herein and which is a basis for a claim of priority. Embodiments of the present invention relate to PCT International Application No. PCT/US2007/076641, filed Aug. 23, 2007, the entire contents of which are incorporated by reference herein, and which claims the benefit of U.S. Provisional Application Ser. No. 60/927,032, filed Apr. 30, 2007.
| Number | Date | Country | |
|---|---|---|---|
| 60927032 | Apr 2007 | US |
