Method and apparatus for invasive tissue removal

Details Method and apparatus for invasive tissue removal Method and apparatus for invasive tissue removal

A - Human Necessities

61

B

A61B 17/22 (2006.01) A61B 17/32 (2006.01) A61B 18/14 (2006.01) A61M 1/00 (2006.01) A61B 17/00 (2006.01) A61F 9/007 (2006.01)

Patent

CA 2156189

A method and apparatus for minimally invasive tissue removal contemplates a system including a tissue cutting tool (10) having a motor driven cutting blade (16) reciprocating within a percutaneously introduceable cannula (15). In accordance with one method of the invention, the frequency of reciprocation of the cutting blade is tuned to a characteristic frequency of the target tissue to be excised. Another aspect of the system includes feedback control of both aspiration (22) and irrigation (23) circuits of the system, coupled with user settable inputs so the surgeon can control the system to "tease" tissue into the cutting opening. Controllable valves (32) and pressure transducers (33) allow the operator to set and maintain the aspiration vacuum and irrigation pressure at optimum levels.

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