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 latch mechanism;
a hypodermic syringe engageable with the latch mechanism for holding the syringe on the cassette;
an injector having a means for selectively holding the cassette on the injector;
a first motor mounted on the injector, the first motor being engageable with the cassette for selectively latching and unlatching the syringe from the cassette, and engageable with the syringe for moving the unlatched syringe on the cassette between a first position and a second position;
a second motor mounted on the injector, the second motor being engageable with the syringe for expelling the fluid medicament from the syringe; and
a computer mounted on the injector for coordinated control of the first and second motors.
2 Assignments
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
20 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 latch mechanism; a hypodermic syringe engageable with the latch mechanism for holding the syringe on the cassette; an injector having a means for selectively holding the cassette on the injector; a first motor mounted on the injector, the first motor being engageable with the cassette for selectively latching and unlatching the syringe from the cassette, and engageable with the syringe for moving the unlatched syringe on the cassette between a first position and a second position; a second motor mounted on the injector, the second motor being engageable with the syringe for expelling the fluid medicament from the 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 syringe, with the syringe being selectively moveable on the support means between a first position wherein the injection needle is withdrawn and concealed within the support means and a second position wherein the injection needle extends from the support means for expelling the fluid medicament from the syringe; and a drive means engaged with the support means, the drive means being bifurcated to have a first motor for moving the hypodermic syringe on the support means and a second motor for advancing the plunger into the syringe chamber to expel the fluid medicament when the syringe is in the second position. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for injecting a fluid medicament from a syringe into a patient comprises the steps of:
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engaging a hypodermic syringe with a cassette, wherein the cassette has a latch mechanism for holding the syringe on the cassette and the syringe includes 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; holding the cassette on an injector, wherein the injector has a first motor engageable with the cassette for selectively latching and unlatching the syringe from the cassette, and engageable with the syringe for moving the unlatched syringe on the cassette between a first position wherein the injection needle is withdrawn and concealed with the cassette and a second position wherein the injection needle extends from the cassette, and a second motor engageable with the syringe for expelling the fluid medicament from the syringe when the syringe is in the second position, and a computer mounted for coordinating control of the first and second motors; and activating the injector to perform a duty cycle for an injection of medicament from the syringe. - View Dependent Claims (17, 18, 19, 20)
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Specification