04469098 is referenced by 91 patents and cites 34 patents.

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.

Title
Apparatus for and method of utilizing energy to excise pathological tissue
Application Number
970132
Publication Number
4469098
Application Date
May 5, 1981
Publication Date
September 4, 1984
Inventor
Samantha K Davi
4620 N. Park Ave., Apartment 1408 West, Chevy Chase, 20015
MD, US
Agent
Lowe King Price & Becker
IPC
A61B 17/36
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