Apparatus for and method of utilizing energy to excise pathologi

Details Apparatus for and method of utilizing energy to excise pathologi Apparatus for and method of utilizing energy to excise pathologi

1978-12-18

1981-05-12

Michell, Robert W.

Surgery

Truss

Pad

350358, 219121LM, 219121LR, 219121LW, 331 945K, A61B 1700, A61N 501

Patent

active

042665485

ABSTRACT:
Pathological tissue is excised with a beam from a laser that is coupled through a flexible, optical wave guide to a collimator that reduces the beam cross sectional area by variable, controlled amounts. A transparent bore or a graphite cannula 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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