Infusion pumps and inserters for use with same
View Patent ↗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.
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driving the trocar in a second direction, opposite the first direction, to a withdrawn position without additional action by the user and in response to the cannula assembly reaching a fired position.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.