INFUSION PUMP ASSEMBLY

• US 20120203177A1
• Filed: 12/29/2010
• Published: 08/09/2012
• Est. Priority Date: 02/09/2006
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Lanier, Gregory R. Jr., Gray, Larry B., Lanigan, Richard J., Kamen, Dean, Fichera, Stephen L., Kerwin, John M.
• Granted Patent: US 8,579,884 B2
• Time in Patent Office: Days
• US Class Current: 604/151
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• 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 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• 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 2205/8237 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 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: 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

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 at least one optical sensor assembly configured to sense the movement of the pump assembly, 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 for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid 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;

at least one optical sensor assembly;

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,

wherein the at least one optical sensor assembly configured to senses the movement of the pump assembly.

2. The wearable infusion pump assembly of claim 1 further comprising a second optical sensor assembly configured to sense the movement of the second valve assembly.

3. 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.

4. The wearable infusion pump assembly of claim 3 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.

5. The wearable infusion pump assembly of claim 3 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.

6. The wearable infusion pump assembly of claim 3 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.

7. The wearable infusion pump assembly of claim 3 wherein the at least one optical sensor is positioned within the reusable housing assembly.

8. 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.

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

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

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

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

13. The wearable infusion pump assembly of claim 11 wherein the actuator includes a shape memory actuator.

14. The wearable infusion pump assembly of claim 8 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.

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

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

17. The wearable infusion pump assembly of claim 15 wherein the actuator includes a shape memory actuator.

18. The wearable infusion pump assembly of claim 15 wherein the fluid delivery system further includes:

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

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

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

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

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