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Ureteric stone extractor with two ballooned catheters

  • US 4,295,464 A
  • Filed: 03/21/1980
  • Issued: 10/20/1981
  • Est. Priority Date: 03/21/1980
  • Status: Expired due to Term
First Claim
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1. A stone extractor for extracting a ureteral stone arrested within any of various sections of a ureter of a patient wherein said various sections include ureteral sections above the lower third sectional area of said ureter;

  • said stone extractor comprising;

    first inflatable means for gradually applying an increasing outward radial force to inner walls of said ureter wherein said inner walls are distended in response to said radial force in a manner such that a stress relaxation state is induced therein;

    first catheter means connected to said first inflatable means and adapted to position said first inflatable means below the position of arrestment of said ureteral stone;

    second inflatable means for applying a downward force to said ureteral stone to achieve dislodgment of said stone from said inner walls of said ureter;

    second catheter means connected to said second inflatable means for positioning said second inflatable means above the position of arrestment of said ureteral stone; and

    said second catheter means is adapted to adjust the position of said second inflatable means relative to said first inflatable means and is manually manipulable to move said ureteral stone into a spacial area of said ureter distended by said first inflatable means.

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