Drug delivery device with proximity sensor
AssigneeAmgen Inc.
InventorAdam B. McCullough
Life of this patent
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Abstract
A drug delivery device, in the form of an injector, may include one of a number of systems for limiting the delivery of a medical fluid or drug product in case of movement of (e.g., removal of) the injector relative to the patient as determined by a proximity sensor. The drug delivery system may in the alternative or in addition include systems for indicating the amount of medical fluid or drug product delivered (or not delivered) in case of movement of (e.g., removal of) the injector relative to the patient as determined by the proximity sensor. The injector may be, for example, an on-body injector or an hand-held autoinjector.
Claims40
A drug delivery device comprising:
- a reservoir including a bore having a first end and a second end, and a plunger assembly including a plunger moveable within the bore between the first and second ends;
- a cannula having an operational state wherein the cannula is connected in fluid communication with the reservoir;
- a drive coupled to the plunger assembly to move the plunger between the first and second ends;
- a lock configured to selectively limit movement of the plunger between the first and second ends of the reservoir;
- a housing, wherein the reservoir, the drive, and the lock are disposed at least partially within the housing;
- and a proximity sensor operably coupled to move relative to the housing, the proximity sensor having a first sensor state wherein the proximity sensor extends from the housing and a second sensor state wherein the proximity sensor is retracted toward the housing relative to the first sensor state, the lock limiting movement of the plunger assembly when the proximity sensor is in the first sensor state.
A method of limiting the delivery of a drug from a drug delivery device after the drug delivery device has been removed from a patient, the drug delivery device comprising:
- a reservoir including a bore having a first end and a second end, and a plunger assembly including a plunger moveable within the bore between the first and second ends,
- a cannula having an operational state wherein the cannula is connected in fluid communication with the reservoir,
- a drive coupled to the plunger assembly for moving the plunger between the first and second ends,
- a lock configured to selectively limit movement of the plunger between the first and second ends of the reservoir,
- a housing, wherein the reservoir, the drive, and the lock are disposed at least partially within the housing, and a proximity sensor operably coupled to move relative to the housing, the proximity sensor having a first sensor state wherein the proximity sensor extends from the housing and a second sensor state wherein the proximity sensor is retracted toward the housing relative to the first sensor state, the lock limiting movement of the plunger assembly when the proximity sensor is in the first sensor state;
- the method comprising:
- (a) after the drug delivery device has been removed from the patient, causing the proximity sensor to move to the first sensor state after having occupied the second sensor state;
- and
- (b) causing the lock to limit movement of the plunger assembly upon the proximity sensor moving to the first sensor state.
The method of claim 34, wherein opening the vent comprises piercing a seal of the vent with a vent cannula.
Dependencies are inferred from the claim text.