Operating an Infusion Pump System

• US 20080045903A1
• Filed: 10/25/2007
• Published: 02/21/2008
• Est. Priority Date: 09/26/2005
• Status: Active Grant

• Current Assignee: Insulet Corporation, M2 Medical Group Holdings, Inc.
• Original Assignee: M2 Medical A/S
• Inventors: Wenger, Mitchell, Kirschen, Todd, Mernoe, Morten, Causey, James, Estes, Mark
• Granted Patent: US 7,981,084 B2
• Time in Patent Office: Days
• US Class Current: 604/152
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2005/14506 mechanically driven, e.g. spring or clockwork
• CPC Class Codes: A61M 2005/14573 with a replaceable reservoir for quick connection/disconnection with a driving system
• CPC Class Codes: A61M 2005/31518 designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
• CPC Class Codes: A61M 5/003 Kits for diabetics
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/1454 spring-actuated, e.g. by a clockwork
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump

Abstract

Some embodiments of a medical infusion pump system include a pump device and a removable controller device. When the pump device and the removable controller device are removably attached to one another, the components may provide a portable infusion pump unit to dispense medicine to a user. In particular embodiments, the removable controller device includes a user interface to readily provide information, for example, about the operation of the pump.

Claims

1. A method of operating a medical infusion pump system, the method comprising:

transmitting electrical energy, from a first battery in a pump device including a drive system to dispense a medicine from the pump device, to a second battery in a removable controller device that is removably attached to and electrically connected to the pump device; and

intermittently transmitting electrical energy from the second battery in the removable controller device to at least a portion of the drive system of the pump device,

wherein the first battery has a greater energy density than the second battery and provides energy to charge the second battery over a period of time.

2. The method of claim 1, wherein the second battery has a greater initial current output than the first battery, and wherein the second battery intermittently discharges bursts of electrical current to the pump device.

3. The method of claim 1, further comprising displaying information on a user interface of the removable controller, the user interface including a display and one or more user-selectable buttons.

4. The method of claim 1, wherein the pump device is portable when removably attached to the controller device.

5. The method of claim 1, wherein the pump device comprises a pump housing structure that defines a space to receive a medicine cartridge, and wherein the drive system of the pump device comprises a flexible piston rod that is incrementally advanced toward the medicine cartridge when the medicine cartridge is received by the pump housing structure.

6. The method of claim 1, further comprising inserting a medicine cartridge in a pump housing structure of the pump device.

7. The method of claim 6, further comprising attaching the removable controller device to the pump device in a fixed relationship so that the controller device is electrically connected to the pump device.

8. The method of claim 7, further comprising activating the drive system of the pump device to dispense the medicine from the medicine cartridge in response to a signal from the removable controller device.

9. The method of claim 8, further comprising detaching the removable controller device 11 from the pump device after the medicine is dispensed from the medicine cartridge.

10. The method of claim 9, further comprising discarding the pump device after the pump device is detached from the removable controller device and attaching the removable controller device to a new pump device in a fixed relationship so that the controller device is electrically connected to the new pump device.

11. A method of operating a medical infusion pump system, the method comprising:

attaching a removable controller device to a pump device in a fixed relationship so that the controller device is electrically connected to the pump device, the pump device including a drive system to dispense a medicine from the pump device;

transmitting electrical energy from a first electrical power source in the pump device to a second electrical power source in a removable controller device, wherein the first power source has a greater energy density than the second power source and provides energy to charge the second power source over a period of time; and

transmitting electrical energy from the second power source in the removable controller device to at least a portion of the drive system of the pump device.

12. The method of claim 11, further comprising inserting a medicine cartridge in a pump housing structure of the pump device.

13. The method of claim 11, further comprising portably carrying the pump device and removable controller device when the pump device is removably attached to the controller device in the fixed relationship.

14. The method of claim 11, further comprising activating the drive system of the pump device to dispense the medicine from the medicine cartridge in response to the step of transmitting electrical energy from the second electrical power source in the removable controller device to at least a portion of the drive system of the pump device.

15. The method of claim 14, further comprising separating the removable controller device from the pump device after the medicine is dispensed from the medicine cartridge.

16. The method of claim 15, further comprising discarding the pump device after the pump device is detached from the removable controller device and attaching the removable controller device to a new pump device in a fixed relationship so that the controller device is electrically connected to the new pump device.

17. The method of claim 11, wherein the removable controller device is electrically connected to the pump device via a hard-wired electrical connection including one or more electrical contacts arranged on the pump device and one or more electrical contacts arranged on the removable controller device.

18. The method of claim 11, wherein the second electrical power source in the controller device periodically discharges bursts of electrical current to activate the drive system of the pump device when the pump device is removably attached to the controller device.

19. The method of claim 18, wherein the second electrical power source comprises a rechargeable battery housed in the controller device.

20. The method of claim 19, wherein the first electrical power source comprises a zinc-air cell battery housed in the pump device, the rechargeable battery housed in the controller device having a higher current output than the zinc-air cell battery housed in the pump device.

21. The method of claim 11, wherein the electrical energy from the second electrical power source in the removable controller device is transmitted to a rotational motor of the drive system.

22. The method of claim 21, wherein the rotational motor is activated by the electrical energy from the second electrical power source to cause an incremental movement of a ratchet mechanism, the incremental movement of the ratchet mechanism driving a piston rod to advance only in a positive longitudinal direction.

23. The method of claim 11, wherein the step attaching a removable controller device to a pump device in a fixed relationship comprises mating a controller housing structure with a pump housing structure so as to form a releasable mechanical connection.

24. The method of claim 23, wherein a user interface is mounted to the controller housing structure so that the user interface is viewable to a user while looking toward the pump device when the releasable mechanical connection is formed.

25. The method of claim 24, wherein the user interface comprises a display screen and one or more user-selectable buttons, the method further comprising displaying menu options to a user on the display screen of the user interface in response to actuation of the one or more buttons.