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Ultrasonic clamp coagulator apparatus having improved waveguide support member

  • US 5,944,737 A
  • Filed: 10/10/1997
  • Issued: 08/31/1999
  • Est. Priority Date: 10/10/1997
  • Status: Expired due to Term
First Claim
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1. An ultrasonic surgical clamp apparatus comprising:

  • a housing;

    an outer tubular sheath having a proximal end joined to said housing, and a distal end;

    an inner actuating member reciprocably positioned within said outer tubular sheath;

    an ultrasonic waveguide positioned within said inner tubular actuating member and having an end-effector extending distally of said distal end of said outer tubular sheath, said actuating member being reciprocable relative to said waveguide;

    a clamp arm pivotally mounted on said distal end of said outer tubular sheath for pivotal movement with respect to said end-effector for clamping tissue between said clamp arm and said end-effector, said clamp arm being operatively connected to said actuating member so that reciprocable movement of said actuating member pivotally moves said clamp arm with respect to said end-effector; and

    an annular support member mounted on said waveguide at a distal-most node thereof for resisting bending moments created during clamping of tissue against said end-effector by said clamp arm, and for sealing the region between said waveguide and said relatively reciprocable actuating member.

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