System and method for an injection using a syringe needle
First Claim
1. A system for injecting a fluid medicament into a patient which comprises:
- a cassette having;
a housing;
a latch mechanism; and
a hypodermic syringe, wherein the latch mechanism is operable to selectively hold the hypodermic syringe in the housing;
an injector configured to removably receive the cassette therein, the cassette having a fixation member for selectively holding the cassette in the injector;
a first motor mounted on the injector, the first motor being engageable with the cassette for moving the hypodermic syringe relative to the housing between a first position and a second position;
a second motor mounted on the injector, the second motor being engageable with the hypodermic syringe for expelling the fluid medicament from the hypodermic syringe; and
a computer mounted on the injector for coordinated control of the first and second motors.
1 Assignment
0 Petitions
Accused Products
Abstract
An auto-injector for injecting a fluid medicament into a patient from a pre-filled syringe requires a disposable cassette that is selectively engageable with the reusable injector. The syringe is latched onto the cassette, and the cassette is then engaged with the injector. Activation of the injector causes a first motor to move the syringe so its needle is extended from a concealed position inside the cassette for injection of the medicament. A second motor on the injector is then activated to expel fluid medicament from the syringe. Then, the first motor is again activated to withdraw the syringe into the cassette for disposal of the cassette/syringe after an injection.
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Citations
15 Claims
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1. A system for injecting a fluid medicament into a patient which comprises:
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a cassette having;
a housing;
a latch mechanism; and
a hypodermic syringe, wherein the latch mechanism is operable to selectively hold the hypodermic syringe in the housing;an injector configured to removably receive the cassette therein, the cassette having a fixation member for selectively holding the cassette in the injector; a first motor mounted on the injector, the first motor being engageable with the cassette for moving the hypodermic syringe relative to the housing between a first position and a second position; a second motor mounted on the injector, the second motor being engageable with the hypodermic syringe for expelling the fluid medicament from the hypodermic syringe; and a computer mounted on the injector for coordinated control of the first and second motors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for injecting a fluid medicament into a patient which comprises:
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a hypodermic syringe having a syringe chamber for holding the fluid medicament therein, an injection needle extending from the syringe chamber, and a plunger slidably mounted for advancement into the syringe chamber to expel fluid medicament therefrom through the injection needle; a support means for holding the hypodermic syringe, the support means being operable such that the hypodermic syringe is selectively moveable between a first position wherein the injection needle is withdrawn and concealed and a second position wherein the injection needle extends from the support means for expelling the fluid medicament from the hypodermic syringe; and an injector configured to removably receive the hypodermic syringe and support means therein, the injector comprising a drive means engaged with the support means and the hypodermic syringe, the drive means being bifurcated to have a first motor for moving the hypodermic syringe between the first and second positions and a second motor for advancing the plunger into the syringe chamber to expel the fluid medicament when the hypodermic syringe is in the second position. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification