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Robust catheter tubing

  • US 8,444,608 B2
  • Filed: 06/05/2009
  • Issued: 05/21/2013
  • Est. Priority Date: 11/26/2008
  • Status: Active Grant
First Claim
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1. An elongate, flexible catheter, comprising:

  • a shaft having a proximal end, a distal end, and a lumen extending therein, the shaft having an inner layer comprising an amorphous polyamide having a Shore D durometer value of greater than 78, and an outer layer comprising a semi-crystalline polyamide or copolyamide having a Shore D durometer value of less than 76, wherein the outer layer is thinner than the inner layer, the shaft having an increased resistance to kinking as compared to a similar shaft of a single layer of the amorphous polyamide having a Shore D durometer value of greater than 78; and

    a working device disposed on the distal end of the shaft.

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