Tamper-resistant hypodermic syringe

Details Tamper-resistant hypodermic syringe Tamper-resistant hypodermic syringe

1983-08-19

1984-05-08

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 500

Patent

active

044472293

ABSTRACT:
Instances have been discovered in which a person has inserted the needle of a first hypodermic syringe through the soft rubber drive piston of a second hypodermic syringe to aspirate some of the narcotic fluid from the second syringe into the first syringe. To prevent this mode of pilfering, an impenetrable barrier is included in the second syringe to prevent the insertion of the needle of the first syringe. The impenetrable barrier may be a unitary portion of the screw that is normally included in the drive piston of the syringe, or the barrier may be a separate part molded into the drive piston.

REFERENCES:
patent: 1561854 (1925-11-01), Hein
patent: 2193489 (1940-03-01), Nevin
patent: 2592381 (1952-04-01), Blackman
patent: 2756747 (1956-07-01), Axelrad
patent: 2994323 (1961-08-01), Dann et al.
patent: 3050059 (1962-08-01), Wall et al.
patent: 4221218 (1980-09-01), Pfleger

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