Single-use, self-annulling injection syringe

Details Single-use, self-annulling injection syringe Single-use, self-annulling injection syringe

1987-04-22

1988-11-01

Truluck, Dalton L.

Surgery

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

Treating material introduced into or removed from body...

604236, A61M 500

Patent

active

047816830

ABSTRACT:
A single-use, self-annulling syringe is disclosed that is rendered inoperative after a single use without requiring any deliberate action on the part of a user. The injection device uses a hydrophilic expansion plug positioned in the outlet flow channel of the syringe, which expands a short time after being exposed to a drug containing water, thereby rendering the syringe inoperative.

REFERENCES:
patent: 2467217 (1949-04-01), Mikeska
patent: 2601216 (1952-06-01), White et al.
patent: 3757779 (1973-09-01), Rovinski
patent: 3768478 (1973-10-01), Fertik et al.
patent: 3850348 (1974-11-01), Bessot et al.
patent: 3982538 (1976-09-01), Sharpe
patent: 4207870 (1980-06-01), Eldridge
patent: 4226236 (1980-10-01), Genese

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