Drug delivery system with a delay mechanism
A medicament delivery system, including a medicament container and a delay mechanism that is activated prior to completion of medicament delivery from the medicament container. The delay mechanism automatically activates a subsystem or initiates an operation subsequent to the completion of the medicament delivery.
1. A medicament delivery system comprising:
a base for placement against a patient's skin;
a medicament container fixedly disposed on the base and initially containing a dose of medicament for delivery;
a needle for delivering the medicament from the medicament container to the patient, the needle being displaceable relative to the base; and
a delay mechanism configured to, subsequent to initiation of the medicament delivery, automatically activate a subsystem subsequent to a predetermined time delay after activation of the delay mechanism.
2. The medicament delivery system of claim 1 , wherein the subsystem comprises withdrawal of the needle, or end-of-dose indication.
3. The medicament delivery system of claim 1 , further comprising a plunger displaceably disposed relative to the medicament container for ejecting the medicament from the medicament container.
4. The medicament delivery system of claim 1 , wherein the delay mechanism comprises a controller and a portable power source, and wherein, upon the activation of the delay mechanism, the controller controls the subsystem to automatically activate the subsystem subsequent to the predetermined time delay.
5. The medicament delivery system of claim 4 , wherein the controller comprises a printed circuit board.
6. The medicament delivery system of claim 4 , wherein the controller is configured to start a delay timer upon the activation of the delay mechanism.
7. The medicament delivery system of claim 1 , further comprising:
a plunger disposed within the medicament container;
wherein the delay mechanism comprises a follower, released by a predetermined displacement of the plunger, and constrained to follow an elongated path that is longer than a path followed by the plunger, an arrival of the follower at an end of the elongated path activating the subsystem.