Biopsy cannula having non-cylindrical interior

Details Biopsy cannula having non-cylindrical interior Biopsy cannula having non-cylindrical interior

1992-09-30

1993-12-21

Hindenberg, Max

Surgery

Truss

Pad

A61B 1000

Patent

active

052714144

ABSTRACT:
A biopsy cannula and a method are provided for capturing and retrieving a specimen of soft tissue for subsequent diagnostic evaluation. The biopsy cannula defines a passageway of non-circular cross-section. The cannula is inserted into target tissue and rotated about the longitudinal axis of the cannula. The non-circular cross-sectional shape of the passageway in the cannula helps the cannula grippingly engage the tissue and cause the tissue to rotate with the cannula. Regions of the tissue adjacent the distal end of the cannula will be subjected to torque and will be severed from tissue outside the cannula. The cannula may then be withdrawn with the severed core of target tissue therein. The exterior of the cannula may be generally rounded or cylindrical in shape.

REFERENCES:
patent: 1273542 (1918-07-01), Schoder
patent: 4314565 (1982-02-01), Lee
patent: 4600014 (1986-07-01), Bercha
patent: 4753640 (1988-06-01), Nichols et al.
patent: 4850373 (1989-07-01), Zatloukal et al.
patent: 5005585 (1991-04-01), Mazza

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