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Surgical cutting instrument having a offset probe for ophthalmic surgery

  • US 4,753,234 A
  • Filed: 11/03/1986
  • Issued: 06/28/1988
  • Est. Priority Date: 11/03/1986
  • Status: Expired due to Fees
First Claim
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1. A surgical instrument useful in ophthalmic surgery comprising:

  • a cylindrical, hollow body having a longitudinal axis, a front end, a rear end and a chamber disposed between said front and rear ends;

    a piston means disposed in said chamber to be movable in a reciprocating manner toward and away from said front end and having a longitudinal axis;

    probe means extending form said front end of said body at a position parallel to and offset from said longitudinal axis of said body including an elongate, tubular outer probe member having a closed distal end and a port adjacent said distal end, and an elongate inner probe member slidably disposed in said outer probe member and having a distal end movable across said port to provide a cutting action, a portion mounted to said piston means to prevent rotation of said piston means and said inner probe member a position offset from said longitudinal axis of said piston and passage means extending along said inner probe member from said distal end to said portion mounted to said piston means;

    evacuating means communicating with said probe means to permit passage of cut material through said surgical cutting instrument; and

    supply means communicating with said chamber to supply pressure to move said piston means to reciprocate said inner probe member in said outer probe member to produce said cutting action.

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