Endoscopic surgical device

  • US 5,906,621 A
  • Filed: 05/14/1996
  • Issued: 05/25/1999
  • Est. Priority Date: 05/14/1996
  • Status: Expired due to Term
First Claim
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1. An endoscopic surgical device for retrieving severed tissue from within a patient'"'"'s body, the device comprising:

  • a. a support unit comprising;

    i. a body defining a passage therethrough; and

    ii. an elongated introducer member having a first end section proximal and fixed with respect to said body and a second end section remote from the body, the introducer member defining a passage aligned with the body passage and opening at said second end section; and

    ,b. a tissue retrieving net system comprising;

    i. a net comprising a wire-like resilient loop and a net element having a mouth section slidably disposed on the loop and a tissue receiving pouch section, said net disposed adjacent said second end for deployment and retrieval through said introducer passage opening;

    ii. a net deployment and retrieval assembly extending substantially through said introducer passage and connected to the net, said assembly comprising a motion transmitting member extending in said introducer passage to said loop; and

    ,iii. a net actuator unit comprising a first handle fixed with respect to said body and a second handle fixed with respect to said motion transmitting member and movable relative to said first handle so that shifting the second handle relative to said first handle shifts said net into and out of said introducer passage opening;

    c. said introducer member passage having a diametrical extent substantially smaller than the width of said loop when said loop is deployed, said introducer member engaging said loop at said opening and resiliently collapsing and elongating said loop as said net is retrieved and moves into said introducer member passage, said loop resiliently returning to an uncollapsed configuration as an is deployed;

    d. said net system further comprising a net controller for assuring that said net mouth extends fully about said loop when said loop is deployed, said controller comprising a net tether having one end anchored within said introducer member passage a distance from said second introducer member end section equal to at least half the length of said loop in an collapsed condition, an opposite end secured to said net mouth, and a free length equal to said distance, said tether assuring full net mouth opening when the net is deployed while permitting said mouth to be closed when tissue is disposed in said net pouch and the loop is retrieved.

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