Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1990-10-03
1991-10-01
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604195, A61M 500
Patent
active
050530100
ABSTRACT:
An improved safety syringe with retractable needle is provided which allows retraction of the needle into a hollow plunger by additional forward pressure on the plunger after the fluid is driven from the syringe. The present invention contemplates an improved syringe device with retractable needle, and a method of delivering fluid to a patient and retracting the needle within the syringe after the fluid is delivered. The syringe preferably includes a hollow plunger inserted into one end of a cylindrical barrel and a hollow needle attached to the other end of the barrel. Biasing means is attached to the barrel for biasing the needle toward the hollow plunger, and means is provided for releasing the needle into the hollow plunger by applying additional forward pressure upon the plunger after the plunger is fully extended into the barrel. The present invention is particularly convenient for the operator to use in a one-handed fashion and is relatively uncomplicated and easy to manufacture. Further, the present invention is non-reusable after the needle is retracted thereby preventing reuse of a potentially contaminated syringe.
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Jentzen S. William
McGary R. Kern
Triad Technology
Yasko John D.
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