Apparatus for and method of utilizing energy to excise pathological tissue
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United States of America Patent
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-
Sep 4, 1984
Issued Date -
N/A
app pub date -
May 5, 1981
filing date -
Dec 18, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Pathological tissue is excised with a beam from a laser that is coupled through a flexible, optical waveguide to a collimator that reduces the beam cross-sectional area by variable, controlled amounts. A transparent bore or a graphite cannule couples the beam exiting the collimator to the tissue to vaporize same. An electrically responsive deflector gyrates the reduced cross-sectional area beam about a bore sight axis aligned with the cannula bore so that the excised tissue has a frusto-conical volume. To excise different, displaced tissue regions, a position servo system moves the cannula so the bore sight axis moves in a plane at right angles to a plane on the exterior surface containing the pathological tissue.
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