Surgical tool

Details Surgical tool Surgical tool

1991-11-20

1992-08-18

Green, Randall L.

Surgery

Instruments

Cutting, puncturing or piercing

606172, 606180, A61B 1732

Patent

active

051395088

ABSTRACT:
A surgical tool for forming a circular opening through the skin which is of smaller diameter at the outer skin surface than at the inner surface of the skin employs a trephine having a circular cutting edge. The trephine is inserted into a pocket surgically formed beneath the skin with its cutting surface facing the skin. A rod member is then inserted through the skin and threaded into the trephine. The rod member is attached to a spring biassed plunger within a tool housing which is released from a ready position by withdrawal of a locking pin. Upon release of the plunger, the spring drives the plunger to drive the cutting edge of the trephine outwardly through the skin.

REFERENCES:
patent: 1557464 (1925-10-01), Mick
patent: 2818852 (1958-01-01), Kugler
patent: 3512519 (1970-05-01), Hall
patent: 3515128 (1970-06-01), McEvoy
patent: 4630597 (1986-12-01), Kantrowitz et al.
patent: 4634422 (1987-01-01), Kantrowitz et al.

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