Biopsy syringe

Details Biopsy syringe Biopsy syringe

1995-06-28

1997-07-29

Rimell, Sam

Surgery

Truss

Pad

128765, 604187, 604210, 604220, A61B 1000

Patent

active

056513720

ABSTRACT:
A control syringe is provided for fine needle aspiration of biopsy tissue. An aperture through the barrel of the syringe is located at a rearward position of the barrel. A low pressure created in the barrel by withdrawing the plunger is broken by withdrawing the plunger past the aperture. Thereafter, the plunger may be pushed forward of the aperture so that collected tissue may be discharged by moving the plunger forward. A detent attached to the plunger holds the plunger in its rearward position until released. The detent comprises a plastic member with an outwardly biased shoulder for engaging the rearward end of the barrel. Such a detent is released by pressing it towards the plunger.

REFERENCES:
patent: 1520795 (1924-04-01), Barr
patent: 3727602 (1973-04-01), Hyden et al.
patent: 3938505 (1976-02-01), Jamshidi
patent: 4405308 (1983-09-01), Jessup
patent: 4549554 (1985-10-01), Markham
patent: 4552155 (1985-11-01), Etherington et al.
patent: 4619272 (1986-10-01), Zambelli
patent: 5246011 (1993-09-01), Caillouette

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