Hypodermic syringe needle guard

Details Hypodermic syringe needle guard Hypodermic syringe needle guard

1993-04-06

1994-08-02

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604192, A61M 500

Patent

active

053341554

ABSTRACT:
A needle guard for a hypodermic syringe to prevent repuncture by a used needle. The needle guard comprises a flexible double-walled membrane which is shaped to define a closed toroidal chamber which, under atmospheric pressure, is conical in shape and defines a hollow interior with an opening thereto for passage of the needle. The toroidal chamber is partially evacuated and folded inwardly upon itself with a needle passing through the opening for normal use of the needle. Upon release of the partial vacuum, the entrance of air into the toroidal chamber effects expansion of the needle guard into the shape of a cone with the needle contained within the hollow interior thereof so that needle-stick or re-use of the needle may be prevented.

REFERENCES:
patent: 4986819 (1991-01-01), Sobel

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