Wearable automatic injection device for controlled delivery of therapeutic agents
First Claim
1. A wearable automatic injection device free of a battery for providing a subcutaneous injection of a therapeutic agent into a patient, the wearable automatic injection device comprising:
- a housing comprising a patient contact portion securable to the patient;
an injection assembly moveably disposed in the housing holding a hypodermic injection needle for insertion into the patient, the injection assembly moveable between a retracted position in which the injection needle does not protrude outside the housing and an extended position in which the injection needle protrudes outside the housing;
a vessel provided in the housing for holding the therapeutic agent;
a plunger moveably disposed in the vessel for ejecting the therapeutic agent from the vessel into the injection assembly;
a plunger actuation mechanism for actuating the plunger using a mechanical or hydraulic mechanism within the vessel;
a retraction trigger responsive to a change of state of the wearable automatic injection device from an injection state to a post-injection state, wherein the wearable automatic injection device enters the post-injection state upon completion of delivery of a therapeutically effective dose of the therapeutic agent and enters the post-injection state upon removal of the wearable automatic injection device from the patient prior to completion of delivery of the therapeutically effective dose of the therapeutic agent; and
a retraction mechanism for automatically retracting the injection assembly from the extended position in the injection state to the retracted position in the post-injection state upon triggering by the retraction trigger.
2 Assignments
0 Petitions
Accused Products
Abstract
Exemplary embodiments provide wearable automatic injection devices for subcutaneously injecting a therapeutic agent into a patient'"'"'s body at controlled rates, for example, in a single bolus. Exemplary embodiments provide methods for assembling wearable automatic injection devices for subcutaneously injecting a therapeutic agent into a patient'"'"'s body at controlled rates. Exemplary embodiments provide methods for using wearable automatic injection devices for subcutaneously injecting a therapeutic agent into a patient'"'"'s body at controlled rates.
388 Citations
43 Claims
-
1. A wearable automatic injection device free of a battery for providing a subcutaneous injection of a therapeutic agent into a patient, the wearable automatic injection device comprising:
-
a housing comprising a patient contact portion securable to the patient; an injection assembly moveably disposed in the housing holding a hypodermic injection needle for insertion into the patient, the injection assembly moveable between a retracted position in which the injection needle does not protrude outside the housing and an extended position in which the injection needle protrudes outside the housing; a vessel provided in the housing for holding the therapeutic agent; a plunger moveably disposed in the vessel for ejecting the therapeutic agent from the vessel into the injection assembly; a plunger actuation mechanism for actuating the plunger using a mechanical or hydraulic mechanism within the vessel; a retraction trigger responsive to a change of state of the wearable automatic injection device from an injection state to a post-injection state, wherein the wearable automatic injection device enters the post-injection state upon completion of delivery of a therapeutically effective dose of the therapeutic agent and enters the post-injection state upon removal of the wearable automatic injection device from the patient prior to completion of delivery of the therapeutically effective dose of the therapeutic agent; and a retraction mechanism for automatically retracting the injection assembly from the extended position in the injection state to the retracted position in the post-injection state upon triggering by the retraction trigger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
-
Specification