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Method for making catheter balloons

  • US 5,891,386 A
  • Filed: 04/25/1997
  • Issued: 04/06/1999
  • Est. Priority Date: 04/25/1997
  • Status: Expired due to Fees
First Claim
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1. A method of forming perfusion balloons which comprises the steps of:

  • providing a tubular mold having an internal mold wall and having a predetermined diameter corresponding to the diameter of balloon to be formed;

    inserting a tube comprising a thermoplastic material into a helical channel forming member;

    inserting said helical channel forming member with said tube inserted therein into said tubular mold;

    heating at least said tube to the glass transition temperature of said thermoplastic material;

    pressurizing said tube to expand said tube into contact with said helical member and said mold wall to form a balloon having a helical perfusion channel;

    cooling said tube to approximately room temperature; and

    removing said tube from said tubular mold and forming member.

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