Anti-needle strike and anti-drug abuse syringe

Details Anti-needle strike and anti-drug abuse syringe Anti-needle strike and anti-drug abuse syringe

1987-02-12

1987-12-01

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, 604240, A61M 500

Patent

active

047101709

ABSTRACT:
A disposable, anti-needle strike, anti-drug abuse syringe which reduces the frequency of accidental needle strikes to health care workers and prevents health-threatening reuse of the needle canula by drug abusers. The syringe has a needle carrying base and an attached hypodermic needle assembly which are relocatable within the syringe cylinder from a distally disposed first position to a proximally disposed second position. A piston assembly having a detachable stem moves reciprocally and axially through the syringe cylinder to expulse fluidic medication and to selectively engage the needle carrying base at the distal bore of the cylinder, whereby to relocate the needle carrying base and its attached needle assembly from the first position to the second position. The needle carrying base is anchored at the second position, such that the used needle extends into and is shielded by the syringe cylinder. The stem is then detached from the piston assembly and inserted through the now open orifice at the distal bore of the cylinder. The piston assembly stem is axially advanced through the syringe cylinder until contact is made with the needle canula which is anchored at and extended into the cylinder from the second cylinder position. The piston stem is further advanced to thereby bend, rather than unsafety snap, the needle canula. The stem is locked at its final position within the syringe cylinder to create a disposal cartridge with the needle canula destroyed, shielded and rendered irretrievable therewithin.

REFERENCES:
patent: 2880725 (1959-04-01), Kendall
patent: 4026287 (1977-05-01), Haller
patent: 4507117 (1985-03-01), Vinning et al.
patent: 4592744 (1986-06-01), Jagger et al.
patent: 4634428 (1987-01-01), Cuu

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