Biopsy instrument

Surgery – Truss – Pad

Patent

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Details

A61B 1000

Patent

active

047763469

ABSTRACT:
An improved instrument for obtaining tissue samples for biopsies is adapted to permit accurate samples to be taken with one-hand. The instrument includes a housing which fits into the palm of the physician's hand and has a guide tube projecting from the forward end which the physician guides to a point from which a sample is required. A spring-loaded cannula is telescoped within the guide tube and a notched sampling stylet is telescoped within the cannula. The tips of the cannula and stylet project slightly from the distal end of the guide tube. An arming slide is provided which is moved forward by the physician's thumb, advancing the stylet into the tissue and cocking the spring-loaded cannula. The physician's thumb then operates a spring release trigger causing the cannula to snap forward, cutting the tissue sample in the stylet notch. The instrument is then withdrawn from the tissue.

REFERENCES:
patent: 3561429 (1971-02-01), Jewett et al.
patent: 4178810 (1979-12-01), Takahashi
patent: 4393872 (1983-07-01), Reznik et al.
patent: 4396021 (1983-08-01), Baumgartner
patent: 4522206 (1985-06-01), Whipple et al.
patent: 4542749 (1985-09-01), Caselgrandi et al.
patent: 4600014 (1986-07-01), Beraka
patent: 4617940 (1986-10-01), Wang
patent: 4699154 (1987-10-01), Lundgren
patent: 4702261 (1987-10-01), Cornell et al.

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