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Blood vessel dilator

  • US 5,827,231 A
  • Filed: 09/05/1996
  • Issued: 10/27/1998
  • Est. Priority Date: 09/05/1995
  • Status: Expired due to Term
First Claim
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1. A blood vessel dilator comprising:

  • an inner tube having an opened distal end and defining a first passageway therein;

    an outer tube coaxially mounted over the inner tube and defining a second passageway therebetween;

    a contractible or foldable dilating member communicating with the second passageway;

    a first opening formed at a portion of said inner tube disposed proximally from said opened distal end and communicating with said first passageway; and

    a second opening formed at a proximal end of said outer tube and communicating with said second passageway;

    wherein said outer tube is composed of a rigid inner tubular component and an outer tubular component covering said inner tubular component, a forward portion of said outer tubular component being extended farther from a distal end of the inner tubular component;

    a distal end portion of said forward portion of said outer tubular component is diametrically contracted fixing onto an outer peripheral surface of said inner tube and extended near the distal end of the inner tube;

    an opening for allowing said second passageway to communicate with an interior of said dilating member is formed at a proximal end portion of said forward portion of said outer tubular component;

    a distal end portion of said dilating member is fixed to a portion of said outer tubular component which is contacted with said inner tube; and

    a proximal end portion of said dilating member is attached to a portion of said outer tubular component which is located rearward of said opening.

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