Impact-damped biopsy instrument

Details Impact-damped biopsy instrument Impact-damped biopsy instrument

1998-06-05

2000-10-03

Hindenburg, Max

Surgery

Diagnostic testing

Sampling nonliquid body material

A61B 500

Patent

active

061266175

ABSTRACT:
A biopsy instrument includes a canula slidingly disposed in a finger tube having a finger at its distal end. By forward displacement of the finger tube relative to the canula the finger is inserted into an opening in the canula wall near its cutting front edge. Thereby a piece of tissue located inside the canula is severed from living tissue. The instrument has a steel spring compressed against a force of at least 35 N for displacing the canula and the finger tube in the tissue cutting step. The stopper on which the moving canula impacts includes an element of an impact damping design. The impact damping element is made of high-impact grade ABS-polymer or a polymer with similar physical properties. It can be used also with known biopsy instruments having a moving canula and/or stylet driven by a powerful spring. Also described is a loading assembly for a biopsy apparatus incorporating the biopsy instrument.

REFERENCES:
patent: 4776346 (1988-10-01), Beraha et al.
patent: 5243994 (1993-09-01), Ranalletta
patent: 5655542 (1997-08-01), Weilandt

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