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Catheter and method of manufacture

  • US 9,254,374 B2
  • Filed: 02/15/2008
  • Issued: 02/09/2016
  • Est. Priority Date: 02/15/2007
  • Status: Active Grant
First Claim
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1. An introducer catheter having a distal end and a proximal end, comprising:

  • a polymeric inner liner having a substantially cylindrical distal section, a substantially cylindrical proximal section, and a frusto-conical intermediate section between the distal section and the proximal section, wherein the inner liner defines a lumen;

    a torque transfer layer surrounding at least a portion of the inner liner, wherein the torque transfer layer terminates proximal to the frusto-conical intermediate section; and

    an outer sheath of a melt-processable polymer, wherein a thickness of the outer sheath surrounding the frusto-conical intermediate section is variable along a length of the frusto-conical section between the proximal and distal sections of the inner liner; and

    wherein the distal end of the introducer catheter is shaped in a preset curvature in a plane including a central longitudinal axis of the introducer catheter.

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