Disposable infusion device with resettable last dose lock-out
A wearable infusion device comprises a reservoir that holds a liquid medicament, an outlet that delivers the liquid medicament to a patient, and a pump that displaces a volume of the liquid medicament to the outlet when actuated. The device further includes a lock-out that disables actuation of the device responsive to a predetermined condition of the device. The lock-out is resettable.
1. A wearable infusion device comprising:
a reservoir that holds a liquid medicament;
an outlet that delivers the liquid medicament to a patient;
a pump that displaces a volume of the liquid medicament to the outlet when actuated; and
a lock-out that disables actuation of the device responsive to a predetermined condition of the device, the lock-out being resettable,
wherein the lock-out includes a pressure sensor and the predetermined condition is a reduced pressure sensed by the pressure sensor,
wherein the device further comprises a fill port communicating with the reservoir to permit liquid medicament to be introduced into the reservoir and wherein the reduced pressure is releasable to reset the lock-out by venting the fill port.
2. The device of claim 1 , wherein the lock-out is a last dose lock-out.
3. The device of claim 1 , further comprising a control that actuates the pump and wherein the lock-out disables the control.
4. The device of claim 1 , wherein the reduced pressure is below ambient pressure.
5. The device of claim 1 , wherein the reduced pressure is less than a predetermined pressure below ambient pressure.
6. The device of claim 1 , wherein the pump produces the reduced pressure when the reservoir is empty.
7. The device of claim 1 , wherein the pump is a piston pump.
8. The device of claim 7 , wherein the piston pump produces the reduced pressure during a recharge stroke when the reservoir is empty.
9. The device of claim 1 , wherein the pressure sensor is between the pump and the reservoir.
10. A wearable infusion device comprising:
a reservoir that holds a liquid medicament;
an outlet that delivers the liquid medicament to a patient;
a piston pump that displaces a volume of the liquid medicament to the outlet when actuated; and
a lock-out that disables actuation of the device responsive to a predetermined condition of the device, the lock-out being resettable,
wherein the lock-out includes a pressure sensor and the predetermined condition is a reduced pressure sensed by the pressure sensor,
the device further comprising a fill port communicating with the reservoir to permit liquid medicament to be introduced into the reservoir and wherein the reduced pressure is releasable to reset the lock-out by venting the fill port and actuating the piston pump through a recharge cycle.
11. A wearable infusion device comprising:
a reservoir that holds a liquid medicament;
an outlet that delivers the liquid medicament to a patient;
a pump that displaces a volume of the liquid medicament to the outlet when actuated; and
a lock-out including a pressure sensor that disables actuation of the device responsive to the pressure sensor sensing a reduced pressure, the reduced pressure being releasable to reset the lock-out,
the device further comprising a fill port communicating with the reservoir to permit liquid medicament to be introduced into the reservoir and wherein the reduced pressure is releasable to reset the lock-out by venting the fill port.
12. The device of claim 11 , wherein the pump produces the reduced pressure when the reservoir is empty.
13. The device of claim 11 , wherein the pump is a piston pump.
14. The device of claim 11 , wherein the pressure sensor is between the pump and the reservoir.
15. The device of claim 13 , wherein the piston pump produces the reduced pressure during a recharge stroke when the reservoir is empty.
16. A wearable infusion device comprising:
a reservoir that holds a liquid medicament;
an outlet that delivers the liquid medicament to a patient;
a piston pump that displaces a volume of the liquid medicament to the outlet when actuated; and
a lock-out including a pressure sensor that disables actuation of the device responsive to the pressure sensor sensing a reduced pressure, the reduced pressure being releasable to reset the lock-out,
the device further comprising a fill port communicating with the reservoir to permit liquid medicament to be introduced into the reservoir and wherein the reduced pressure is releasable to reset the lock-out by venting the fill port and actuating the piston pump through a recharge cycle.
17. A wearable infusion device comprising:
a reservoir that holds a liquid medicament;
a fill port permitting a medicament to be introduced into the reservoir;
an outlet that delivers the liquid medicament to a patient;
a piston pump that displaces a volume of the liquid medicament to the outlet when actuated, the piston pump being operable through a recharge cycle and producing a reduced pressure during the recharge cycle when the reservoir is empty; and
a lock-out including a pressure sensor that disables actuation of the device responsive to the pressure sensor sensing the reduced pressure, the reduced pressure being releasable through the fill port to reset the lock-out.