Infusion pumps and inserters for use with same

• US 9,114,208 B2
• Filed: 05/18/2012
• Issued: 08/25/2015
• Est. Priority Date: 11/20/2010
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: PerQFlo, LLC
• Inventors: Smith, Roger E., Gibson, Scott R.
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): Osinski, Bradley
• Application Number:
  US13/475,843
• Publication Number:
  US 20130138078A1
• Time in Patent Office: 1,194 Days
• Field of Search: 604/138, 604/158, 604/159, 604/164.01, 604/164.04
• US Class Current: 1/1
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/16863 Occlusion detection
• CPC Class Codes: A61M 2205/8256 being integrated in the case or housing of the apparatus
• CPC Class Codes: A61M 2209/01 Remote controllers for specific apparatus
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• 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 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

Ambulatory infusion pumps, pump assemblies, and disposable assemblies, including cartridges, baseplates, cannulas, inserters, and related components therefor, as well as component combinations and related methods.

Claims

1. A method of inserting a cannula, comprising the steps of:

driving a cannula assembly and a trocar in a first direction with an inserter that is mounted to a medicament cartridge, which includes a manifold, a barrel defining a medicament reservoir and a movable plunger within the barrel, in response to rotation by a user of an outer portion of the inserter relative to an inner portion of the inserter, a portion of the cannula assembly and trocar being located within at least a portion of the manifold prior to being driven in the first direction; and

driving the trocar in a second direction, opposite the first direction, to a withdrawn position without additional action by the user and in response to the cannula assembly reaching a fired position.

2. The method as claimed in claim 1, further comprising the step of:

disconnecting the inserter from the medicament cartridge in response to additional rotation of the outer portion of the inserter by the user.

3. The method as claimed in claim 1, further comprising the step of:

disconnecting the inserter from the medicament cartridge without additional action by the user and in response to a portion of the inserter reaching a fired position.

4. The method as claimed in claim 3, wherein

the inserter is connected to the medicament cartridge by a third lock apparatus having a locked state and an unlocked state;

and

the step of disconnecting the inserter from the medicament cartridge comprises driving the third lock apparatus from the locked state to the unlocked state when the first trocar assembly member reaches the fired position.

5. The method as claimed in claim 1, wherein

the trocar is part of a trocar assembly that includes a first trocar assembly member that is movable in the first direction from a storage position to the fired position, a second trocar assembly member that carries the trocar and is operably connected to the first trocar assembly member such that the second trocar assembly member is movable with the first trocar assembly member in the first direction from the storage position to the fired position and the second trocar assembly member is also movable relative to the first trocar assembly member in the second direction to the withdrawn position, a first force member, operably connected to the first and second trocar assembly members, that applies a force in the second direction to the second trocar assembly member, and a first lock apparatus having a locked state that prevents movement of the first and second trocar assembly members relative to one another and an unlocked state that permits movement of the first and second trocar assembly members relative to one another;

and

the step of driving the trocar in a second direction comprises;

transitioning the first lock apparatus from the locked state to the unlocked state as a result of the trocar assembly reaching the fired position, and

driving the second trocar assembly member to the withdrawn position with the first force member when the first lock apparatus transitions from the locked state to the unlocked state.

6. The method as claimed in claim 5, wherein the step of driving a cannula assembly and a trocar in a first direction comprises unlocking a second lock apparatus, having a locked state that prevents movement of the trocar assembly and an unlocked state that permits movement of the trocar assembly, in response to rotation of an actuator.

7. The method as claimed in claim 5, wherein

the first lock apparatus is longitudinally aligned with a locking surface when the trocar assembly is in the storage position;

and

the first lock apparatus is not longitudinally aligned with the locking surface when the trocar assembly is in the fired position.

8. The method as claimed in claim 1, wherein the step of driving a cannula assembly and a trocar in a first direction comprises driving the cannula assembly and trocar with a spring.

9. The method as claimed in claim 1, wherein the step of driving the trocar in a second direction comprises driving the trocar in the second direction with a spring.

10. The method as claimed in claim 1, wherein

the step of driving a cannula assembly and a trocar in a first direction comprises driving the cannula assembly and trocar in the first direction with a first spring;

and

the step of driving the trocar in a second direction comprises driving the trocar in a second direction with a second spring.

11. A method of inserting a cannula, comprising the steps of:

driving a cannula assembly and a trocar, which have portions located within at least a portion a medicament cartridge that is connected to an inserter, with a first spring in a first direction with the inserter in response to rotation by a user of an outer portion of the inserter relative to an inner portion of the inserter; and

driving the trocar in a second direction, opposite the first direction, with a second spring that is maintained in a compressed state while the first spring drives the cannula assembly and trocar in the first direction, to a withdrawn position without additional action by the user and in response to the cannula assembly reaching a fired position.

12. The method as claimed in claim 11, further comprising the step of:

disconnecting the inserter from the medicament cartridge in response to additional rotation of the outer portion of the inserter by the user.

13. The method as claimed in claim 11, further comprising the step of:

disconnecting the inserter from the medicament cartridge without additional action by the user and in response to a portion of the inserter reaching a fired position.

14. The method as claimed in claim 11, wherein

the inserter is connected to the medicament cartridge by a third lock apparatus having a locked state and an unlocked state;

and

the step of disconnecting the inserter from the medicament cartridge comprises driving the third lock apparatus from the locked state to the unlocked state when the first trocar assembly member reaches the fired position.

15. The method as claimed in claim 11, wherein

the trocar is part of a trocar assembly that includes a first trocar assembly member that is movable in the first direction from a storage position to the fired position, a second trocar assembly member that carries the trocar and is operably connected to the first trocar assembly member such that the second trocar assembly member is movable with the first trocar assembly member in the first direction from the storage position to the fired position and the second trocar assembly member is also movable relative to the first trocar assembly member in the second direction to the withdrawn position, a first force member, operably connected to the first and second trocar assembly members, that applies a force in the second direction to the second trocar assembly member, and a first lock apparatus having a locked state that prevents movement of the first and second trocar assembly members relative to one another and an unlocked state that permits movement of the first and second trocar assembly members relative to one another;

and

the step of driving the trocar in a second direction comprises;

transitioning the first lock apparatus from the locked state to the unlocked state as a result of the trocar assembly reaching the fired position, and

driving the second trocar assembly member to the withdrawn position with the first force member when the first lock apparatus transitions from the locked state to the unlocked state.

16. The method as claimed in claim 15, wherein the step of driving a cannula assembly and a trocar in a first direction comprises unlocking a second lock apparatus, having a locked state that prevents movement of the trocar assembly and an unlocked state that permits movement of the trocar assembly, in response to rotation of an actuator.

17. The method as claimed in claim 15, wherein

the first lock apparatus is longitudinally aligned with a locking surface when the trocar assembly is in the storage position;

and

the first lock apparatus is not longitudinally aligned with the locking surface when the trocar assembly is in the fired position.