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Gas-sealed instruments for use in laparoscopic surgery

  • US 5,618,291 A
  • Filed: 06/02/1995
  • Issued: 04/08/1997
  • Est. Priority Date: 05/26/1992
  • Status: Expired due to Term
First Claim
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1. An instrument for use in laparoscopic procedures in a body cavity insufflated with a gas, the instrument comprising:

  • a handle;

    an elongate outer tube having a bore, a distal portion adapted for inserting into the body cavity, and a proximal portion attached to the handle;

    an operating lever pivotally mounted in the handle;

    an elongate operating rod mounted in the bore of the elongate outer tube, and sliding axially in response to the operating lever; and

    a sealing means for preventing the gas from escaping from the body cavity through the outer tube, the sealing means including;

    a cylinder in the handle, the cylinder being in gas-tight communication with the bore of the outer tube;

    a piston slidably mounted in the cylinder, interconnecting the operating lever and the operating rod.

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