Biliary biopsy device

Details Biliary biopsy device Biliary biopsy device

1994-08-15

1995-10-17

Sykes, Angela D.

Surgery

Truss

Pad

128754, 606171, A61B 1000

Patent

active

054581125

ABSTRACT:
A surgical instrument assembly for use in a biopsy operation includes a flexible tube having a pair of opposed ends and a substantially rigid, cylindrical cutter having a distal end, a proximal end secured to one of the opposed tube ends for longitudinal movement therewith, and a sidewall connecting the distal and proximal ends. The cutter sidewall defines at least one recess having a barb at the outer distal end thereof for separating biopsy tissue from a patient and maintaining the separated tissue in the recess during movement of the cutter. The other of the opposed tube ends is optionally operatively securable to a vacuum source for applying a vacuum to the recess via a longitudinal cavity in the tube and cutter member. An unloading stylet may be disposed within the longitudinal cavity in the cutter for sliding movement relative thereto between a proximal position relative to the recess and a distal position within the recess, whereby movement of the unloading stylet from the proximal position to the distal position ejects from the recess any separated tissue therein.

REFERENCES:
patent: 4340066 (1982-07-01), Shah
patent: 4651753 (1987-03-01), Lifton
patent: 4907598 (1990-03-01), Bauer
patent: 5090419 (1992-02-01), Palestrant
patent: 5106364 (1992-04-01), Hayafuji et al.
patent: 5127419 (1992-07-01), Kaldany
patent: 5190542 (1993-03-01), Nakao et al.
patent: 5327896 (1994-07-01), Schmieding
"Endoscopic Needle Aspiration Biopsy at ERCP In The Diagnosis Of Strictures", Gastrointesinal Endoscopy, vol. 38, No. 5, 1992.

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