Infusion pumps

• US 8,777,901 B2
• Filed: 09/24/2010
• Issued: 07/15/2014
• Est. Priority Date: 09/24/2010
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: PerQFlo, LLC
• Inventors: Smith, Roger E., Causey, James
• Primary Examiner(s): Desanto, Matthew F
• Application Number:
  US12/890,207
• Publication Number:
  US 20120078170A1
• Time in Patent Office: 1,390 Days
• Field of Search: 604131-155, 604 65- 67
• US Class Current: 604/151
• CPC Class Codes: A61M 2005/16863 Occlusion detection
• CPC Class Codes: A61M 2205/073 Syringe, piston type
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/16804 Flow controllers
• CPC Class Codes: A61M 5/16854 by monitoring line pressure
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

Ambulatory infusion pumps, pump assemblies, cartridges, baseplates, cannulas, insertion tools, and related components as well as combinations thereof and related methods.

Claims

1. An infusion pump system, comprising:

a disposable first portion that includes

a body which defines a medicament reservoir,

medicament in the reservoir,

a manifold with an inner surface that defines a through-bore having first and second longitudinal ends configured to receive a cannula,

an outlet port located between the first and second longitudinal ends of the through-bore that extends from the medicament reservoir and through the inner surface that defines the through-bore,

a first part of an occlusion sensor,

an aperture located between the first and second longitudinal ends of the through-bore that extends from the first part of the occlusion sensor and through the inner surface that defines the through-bore, and

a cannula that is insertable into the through-bore and has an opening, in fluid communication with the outlet port when the cannula is in position in the through-bore, and first and second seals positioned such that the outlet port and the aperture that extends from the first part of the occlusion sensor will be located between the first and second seals when the cannula is in position in the through-bore;

a reusable second portion that includes a motor and a second part of the occlusion sensor and is free of any portion of the medicament fluid path of the infusion pump system; and

the disposable first portion and the reusable second portion being respectively configured such that the reusable second portion is positionable in an operative position where operation of the motor causes the medicament to be dispensed out of the medicament reservoir and the first and second parts are operative together to detect an occlusion in the medicament fluid path.

2. A system as claimed in claim 1, wherein the first part includes a magnet and the second part includes a Hall-effect sensor or a magnetoresistive sensor.

3. A system as claimed in claim 2, wherein the magnet is attached to a flexible diaphragm.

4. A system as claimed in claim 1, further comprising:

an alarm;

wherein the reusable second portion includes a controller that is configured to receive one or more pressure signals from the occlusion sensor, to determine whether there is an occlusion, and to activate the alarm and not advance the motor and in response to an occlusion determination.

5. A system as claimed in claim 4, wherein the controller is configured to operate the motor in a retraction direction in response to an occlusion determination.

6. A system as claimed in claim 1, wherein the first part is a fluid force deflectable part.

7. A system as claimed in claim 1, wherein the first part is an unpowered part of the occlusion sensor and the second part is a powered part of the occlusion sensor.

8. A system as claimed in claim 1, wherein the first part includes a magnetically permeable material and the second part includes a coil whose inductance changes by movement of the magnetically permeable material relative thereto.

9. A system as claimed in claim 1, wherein the first part includes an optical element and the second part includes an optical sensor.

10. A system as claimed in claim 1, wherein

the reusable second portion includes a controller, a gear assembly, a lead screw, a plunger pusher and an encoder;

the disposable first portion includes a plunger associated with the medicament reservoir; and

the reusable second portion and the disposable first portion are respectively configured such that the pusher and plunger are operably aligned when the disposable first portion is in the operative position.

11. A system as claimed in claim 1, wherein the disposable first portion includes a removable seal that is configured to be inserted into the through-bore and, when fully inserted, to isolate the outlet port from the aperture that extends from the first part of the occlusion sensor.

12. A system as claimed in claim 1, wherein the disposable first portion is removable from the operative position in the reusable second portion when the medicament reservoir is empty and/or when the medicament reservoir is only partially full.

13. An infusion pump system, comprising:

a disposable first portion that includes

a barrel which defines a medicament reservoir and a plunger is located in the barrel,

medicament in the reservoir,

a manifold, with an inner surface that defines a through-bore configured to receive a cannula, that is either monolithically formed with the barrel or is formed separately and permanently joined to the barrel such that the manifold and the barrel are not separable,

an outlet port that extends from the medicament reservoir and through the inner surface that defines the through-bore,

a first part of an occlusion sensor, and

an aperture that extends from the first part of the occlusion sensor and through the inner surface that defines the through-bore;

a reusable second portion that includes a motor and a second part of the occlusion sensor and is free of any portion of the medicament fluid path of the infusion pump system; and

the disposable first portion and the reusable second portion being respectively configured such that the reusable second portion is positionable in an operative position where operation of the motor causes the medicament to be dispensed out of the medicament reservoir and the first and second parts are operative together to detect an occlusion in the medicament fluid path.

14. A system as claimed in claim 13, wherein the reusable second portion includes an opening in a bottom surface thereof through which at least a substantial portion of the disposable first portion is inserted to the operative position.

15. A system as claimed in claim 14, further comprising:

a baseplate configured to be attached to the reusable second portion and to substantially cover the bottom surface.

16. A system as claimed in claim 15, wherein the baseplate includes an opening, the system further comprising:

a cannula that is positionable in the through-bore, the bottom surface opening and the baseplate opening.

17. A system as claimed in claim 14, wherein the reusable second portion includes a latch mechanism that secures the disposable first portion in the operative position.

18. A system as claimed in claim 13, wherein the disposable first portion includes a cannula, insertable into the through-bore, having an opening in fluid communication with the outlet port when the cannula is in position in the through-bore.

19. A system as claimed in claim 13, wherein the through-bore has first and second longitudinal ends and the outlet port and the aperture that extends from the first part of the occlusion sensor are located between the first and second longitudinal ends.