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Catheter system

  • US 5,871,475 A
  • Filed: 01/11/1996
  • Issued: 02/16/1999
  • Est. Priority Date: 06/05/1995
  • Status: Expired due to Term
First Claim
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1. A medical device for opening strictures in mammalian gastrointestinal and genitourinary passages, comprising a tube with an external helical thread disposed thereon, said thread having a thread height of at least one fifth (1/5) of the outside diameter of said tube and a thread pitch not greater than the circumference of the helix formed by said thread.

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