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Balloon catheter

  • US 5,352,199 A
  • Filed: 05/28/1993
  • Issued: 10/04/1994
  • Est. Priority Date: 05/28/1993
  • Status: Expired due to Term
First Claim
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1. A device for cardiac valvuloplasty comprising:

  • a catheter having an longitudinal axis and a lumen for transferring a fluid therethrough;

    a transaxially expandable dilation means attached to the catheter in fluid flow communication with said lumen for inflation therethrough, said dilation means consisting essentially of a distensible chamber bounded by a membrane, said chamber being inflatable at a first inflating pressure to a memorized shape comprising two end sections and a central waist therebetween that has a smaller diameter than said end sections, said waist being positionable in an orifice of a valve to be dilated, said end sections engaging upstream and downstream surfaces of the valve to restrain axial displacement of said chamber relative thereto, said waist being effaced at a second inflating pressure that is higher than said first inflating pressure to dilate the valve thereabout.

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