Infusion pump assembly

• US 10,272,195 B2
• Filed: 10/19/2015
• Issued: 04/30/2019
• Est. Priority Date: 02/09/2007
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Kamen, Dean, Gray, Larry Brian, Lanigan, Richard J., Kerwin, John Matthew, Fichera, Stephen Lewis
• Primary Examiner(s): Stiles, Amber R
• Application Number:
  US14/886,865
• Publication Number:
  US 20160038671A1
• Time in Patent Office: 1,289 Days
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2005/16863 Occlusion detection
• CPC Class Codes: A61M 2205/0266 Shape memory materials
• CPC Class Codes: A61M 2205/0294 Piezoelectric materials
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/332 Force measuring means
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: A61M 2205/3546 Range
• CPC Class Codes: A61M 2205/3576 with non implanted data transmission devices, e.g. using external transmitter or receiver
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/8237 Charging means
• CPC Class Codes: A61M 2206/22 eliminating pulsatile flows, e.g. by the provision of a dampening chamber
• CPC Class Codes: A61M 2209/045 for filling, e.g. for filling reservoirs
• CPC Class Codes: A61M 2230/201 Glucose concentration
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14224 Diaphragm type
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14248 : of the skin patch type
• CPC Class Codes: A61M 5/14586 : pressurised by means of a flexible diaphragm
• CPC Class Codes: A61M 5/16809 : by repeated filling and emptying of an intermediate volume pressure infusion using positive displacement pumps A61M5/142
• CPC Class Codes: A61M 5/16886 : for measuring fluid flow rate, i.e. flowmeters
• CPC Class Codes: A61M 5/172 : electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/1723 : using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: G01F 11/086 : using an auxiliary pressure to cooperate with the diaphragm or bellows
• CPC Class Codes: G05D 7/0647 : the plurality of throttling means being arranged in series
• CPC Class Codes: G05D 7/0676 : by action on flow sources G05D7/0688, G05D7/0694 take precedence
• CPC Class Codes: G08C 17/02 : using a radio link
• CPC Class Codes: H04B 7/2609 : Arrangements for range control, e.g. by using remote antennas
• CPC Class Codes: Y10T 29/49236 : Fluid pump or compressor making
• CPC Class Codes: Y10T 29/494 : Fluidic or fluid actuated device making
• CPC Class Codes: Y10T 29/49412 : with assembly, disassembly or composite article making
• CPC Class Codes: Y10T 29/49826 : Assembling or joining
• CPC Class Codes: Y10T 29/49828 : Progressively advancing of work assembly station or assembled portion of work

Abstract

A wearable infusion pump assembly includes a reservoir for receiving an infusible fluid, and an external infusion set configured to deliver the infusible fluid to a user. A fluid delivery system is configured to deliver the infusible fluid from the reservoir to the external infusion set. The fluid delivery system includes a volume sensor assembly, and a pump assembly for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid to the volume sensor assembly. The volume sensor assembly is configured to determine the volume of at least a portion of the quantity of fluid. The fluid delivery system further includes a first valve assembly configured to selectively isolate the pump assembly from the reservoir, and a second valve assembly configured to selectively isolate the volume sensor assembly from the external infusion set.

Claims

1. A wearable infusion pump assembly comprising:

a reservoir for receiving an infusible fluid;

an external infusion set configured to deliver the infusible fluid to a user; and

a fluid delivery system configured to deliver the infusible fluid from the reservoir to the external infusion set, wherein the fluid delivery system includes;

a volume sensor assembly;

a pump assembly including a chamber and a pumping member movable within the chamber, wherein movement of the pumping member within the chamber is configured to extract a quantity of infusible fluid from the reservoir, provide the quantity of infusible fluid to the chamber, and drive the quantity of infusible fluid from the chamber to the volume sensor assembly, wherein the volume sensor assembly is configured to determine the volume of at least a portion of the quantity of fluid;

a first valve assembly positioned between the reservoir and the pump assembly and configured to selectively isolate the pump assembly from the reservoir; and

a second valve assembly positioned between the volume sensor assembly and the external infusion set and configured to selectively isolate the volume sensor assembly from the external infusion set.

2. The wearable infusion pump assembly of claim 1 further comprising:

a disposable housing assembly including the reservoir and a first portion of the fluid delivery system; and

a reusable housing assembly including a second portion of the fluid delivery system.

3. The wearable infusion pump assembly of claim 2 wherein a first portion of the pump assembly is positioned within the disposable housing assembly, and a second portion of the pump assembly is positioned within the reusable housing assembly.

4. The wearable infusion pump assembly of claim 2 wherein a first portion of the first valve assembly is positioned within the disposable housing assembly, and a second portion of the first valve assembly is positioned within the reusable housing assembly.

5. The wearable infusion pump assembly of claim 2 wherein a first portion of the second valve assembly is positioned within the disposable housing assembly, and a second portion of the second valve assembly is positioned within the reusable housing assembly.

6. The wearable infusion pump assembly of claim 1, wherein the external infusion set is a detachable external infusion set configured to releasably engage the fluid delivery system, the detachable external infusion set comprising:

a cannula;

tubing; and

a cannula interface configured to releasably couple an end of the tubing distal from the fluid delivery system to the cannula.

7. The wearable infusion pump assembly of claim 1 further comprising:

at least one processor; and

a computer readable medium coupled to the at least one processor, the computer readable medium including a plurality of instructions stored thereon which, when executed by the at least one processor, cause the at least one processor to perform operations comprising;

activating the first valve assembly to isolate the pump assembly from the reservoir; and

activating the pump assembly to provide the quantity of infusible fluid to the volume sensor assembly.

8. The wearable infusion pump assembly of claim 7 wherein the fluid delivery system includes an actuator associated with the first valve assembly and activating the first valve assembly includes energizing the actuator.

9. The wearable infusion pump assembly of claim 8 wherein the actuator includes a shape memory actuator.

10. The wearable infusion pump assembly of claim 7 wherein the fluid delivery system includes an actuator associated with the pump assembly and activating the pump assembly includes energizing the actuator.

11. The wearable infusion pump assembly of claim 10 wherein the fluid delivery system includes a bell crank assembly for mechanically coupling the pump assembly to the actuator.

12. The wearable infusion pump assembly of claim 10 wherein the actuator includes a shape memory actuator.

13. The wearable infusion pump assembly of claim 7 wherein the computer readable medium further includes instructions for:

activating the volume sensor assembly to determine the volume of at least a portion of the quantity of fluid provided to the volume sensor assembly from the pump assembly; and

activating the second valve assembly to fluidly couple the volume sensor assembly to the external infusion set.

14. The wearable infusion pump assembly of claim 13 wherein the fluid delivery system includes an actuator associated with the second valve assembly and activating the second valve assembly includes energizing the actuator.

15. The wearable infusion pump assembly of claim 14 wherein the fluid delivery system includes a bell crank assembly for mechanically coupling the second valve assembly to the actuator.

16. The wearable infusion pump assembly of claim 14 wherein the actuator includes a shape memory actuator.

17. The wearable infusion pump assembly of claim 14 wherein the fluid delivery system further includes:

a bracket assembly configured to maintain the second valve assembly in an activated state.

18. The wearable infusion pump assembly of claim 17 wherein the computer readable medium further includes instructions for:

activating the bracket assembly to release the second valve assembly from the activated state.

19. The wearable infusion pump assembly of claim 18 wherein activating the bracket assembly includes energizing a bracket actuator associated with the bracket assembly.

20. The wearable infusion pump assembly of claim 19 wherein the bracket actuator includes a shape memory actuator.