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. An inserter apparatus, comprising:
a main body defining a proximal end, a distal end and a longitudinal axis;
a trocar assembly, located at least partially within the main body and movable relative to the main body, including
a first trocar assembly member movable relative to the main body in a first direction from a storage position to a fired position,
a second trocar assembly member 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to the first trocar assembly member in a second direction, opposite the first direction, from the fired position to a withdrawn position,
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,
a first force member, that has a first end that applies force to the first trocar assembly member and a second end that applies force to the second trocar assembly member, that stores potential energy when the first and second trocar assembly members are in the storage position and that drives the second trocar assembly member in the second direction with the stored potential energy when the first lock apparatus is in the unlocked state, and
a trocar carried by the second trocar assembly member;
a second force member, operably connected to the main body and to the trocar assembly, that applies a force in the first direction to the first trocar assembly member;
a second lock apparatus having a locked state that prevents movement of the trocar assembly relative to the main body and an unlocked state that permits movement of the trocar assembly relative to the main body; and
an actuator carried by the main body and rotatable about the longitudinal axis relative to the main body from a first position, that prevents the second lock apparatus from being in the unlocked state, to a second position that allows the second lock apparatus to be in the unlocked state.
2. An inserter apparatus as claimed in claim 1 , wherein
the second force member drives the second lock apparatus from the locked state to the unlocked state, and drives the trocar assembly from the storage position to the fired position, when the actuator is in the second position.
3. An inserter apparatus as claimed in claim 2 , wherein
the first lock apparatus is in the locked state when the trocar assembly is in the storage position;
the first lock apparatus transitions from the locked state to the unlocked state in response to the trocar assembly reaching the fired position; and
the first force member drives the second trocar assembly member to the withdrawn position when the first lock apparatus transitions from the locked state to the unlocked state.
4. An inserter apparatus as claimed in claim 3 , wherein
the main body includes a locking surface that prevents the first lock apparatus from being in the unlocked state when the first lock apparatus is longitudinally aligned with the locking surface;
the first lock apparatus is longitudinally aligned with the 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.
5. An inserter apparatus as claimed in claim 2 , wherein
the second force member defines first and second longitudinal ends;
the first longitudinal end of the second force member engages the main body;
the second longitudinal end of the second force member engages the first trocar assembly member; and
the second longitudinal end of the second force member does not engage the second trocar assembly member.
6. An inserter apparatus as claimed in claim 1 , wherein
the main body includes a tubular portion; and
the second lock apparatus is carried by, and is pivotable relative to, the main body tubular portion.
7. An inserter apparatus as claimed in claim 6 , wherein
the actuator comprises a tubular portion and an aperture that extends through the tubular portion; and
the aperture is rotationally aligned with the second lock apparatus when the actuator is in the second position.
8. An inserter apparatus as claimed in claim 1 , wherein
the main body defines an exterior; and
the actuator is on the exterior of the main body.
9. An inserter apparatus as claimed in claim 1 , wherein
the main body includes an annular groove; and
the actuator includes an annular protrusion located in the annular groove.
10. An inserter apparatus as claimed in claim 1 , wherein
the actuator is configured to be secured to a medicament cartridge.
11. An inserter apparatus as claimed in claim 1 , further comprising:
a third lock apparatus having a locked state configured to secure the inserter apparatus to a medicament cartridge and an unlocked state;
wherein the first trocar assembly member drives the third lock apparatus from the locked state to the unlocked state when the first trocar assembly member reaches the fired position.
12. An inserter apparatus as claimed in claim 1 , wherein
at least one of the first and second force members comprises a resilient member.
13. An inserter apparatus as claimed in claim 12 , wherein
the resilient member comprises a compressed spring.
14. An inserter apparatus, comprising:
a main body defining a proximal end, a distal end and a longitudinal axis;
a trocar assembly, located at least partially within the main body and movable relative to the main body, including
a first trocar assembly member movable relative to the main body in a first direction from a storage position to a fired position,
a second trocar assembly member 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 a second direction, opposite the first direction, from the fired position to a withdrawn position,
a first spring, operably connected to the first and second trocar assembly members, that is maintained in a compressed state as the first and second trocar assemblies move from the storage position to the fired position,
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
a trocar carried by the second trocar assembly member;
a second spring, operably connected to the main body and to the trocar assembly, that applies a force in the first direction to the first trocar assembly member;
a second lock apparatus having a locked state that prevents movement of the trocar assembly relative to the main body relative and an unlocked state that permits movement of the trocar assembly relative to the main body; and
an actuator carried by the main body and rotatable about the longitudinal axis relative to the main body from a first position, that prevents the second lock apparatus from being in the unlocked state, to a second position that allows the second lock apparatus to be in the unlocked state.
15. An inserter apparatus as claimed in claim 14 , wherein
the second spring drives the second lock apparatus from the locked state to the unlocked state, and drives the trocar assembly from the storage position to the fired position, when the actuator is in the second position.
16. An inserter apparatus as claimed in claim 15 , wherein
the first lock apparatus is in the locked state when the trocar assembly is in the storage position;
the first lock apparatus transitions from the locked state to the unlocked state in response to the trocar assembly reaching the fired position; and
the first spring drives the second trocar assembly member to the withdrawn position when the first lock apparatus transitions from the locked state to the unlocked state.
17. An inserter apparatus as claimed in claim 16 , wherein
the main body includes a locking surface that prevents the first lock apparatus from being in the unlocked state when the first lock apparatus is longitudinally aligned with the locking surface;
the first lock apparatus is longitudinally aligned with the 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.
18. An inserter apparatus as claimed in claim 15 , wherein
the second spring defines first and second longitudinal ends;
the first longitudinal end of the second spring engages the main body;
the second longitudinal end of the second spring engages the first trocar assembly member; and
the second longitudinal end of the second spring does not engage the second trocar assembly member.
19. An inserter apparatus as claimed in claim 14 , wherein
the actuator is configured to be secured to a medicament cartridge.
20. An inserter apparatus as claimed in claim 14 , further comprising:
a third lock apparatus having a locked state configured to secure the inserter apparatus to a medicament cartridge and an unlocked state;
wherein the first trocar assembly member drives the third lock apparatus from the locked state to the unlocked state when the first trocar assembly member reaches the fired position.