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Dilatation catheter with stiffening wire

  • US 6,368,302 B1
  • Filed: 08/19/1998
  • Issued: 04/09/2002
  • Est. Priority Date: 08/25/1992
  • Status: Expired due to Fees
First Claim
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1. A dilatation catheter having a proximal end and a distal end, said catheter comprising:

  • an elongated tubular shaft comprising a distal shaft having a proximal end and a distal end, a proximal shaft having a proximal end and a distal end, said proximal end of said distal shaft overlapping said distal end of said proximal shaft and a guide wire port for entry of a guide wire into said distal shaft;

    a balloon attached to said distal shaft;

    an inner tube extending within said tubular shaft from a point proximal of said guide wire port within said proximal shaft through said distal shaft to a point distal of said guide wire port, said inner tube including an opening adjacent said guide wire port to enable a guide wire to be introduced into and extend through said inner tube through said guide wire port and said opening, said inner tube including a wire retention section adjacent said opening, said inner tube being bonded to said tubular shaft, with a space between said inner tube and tubular shaft providing an inflation lumen for said balloon wherein said inner tube, proximal shaft and distal shaft are made of thermoplastic material in the region of said guide wire port, said proximal shaft and inner tube are thermally bonded to said distal shaft to form a fused laminate, said proximal shaft also including an opening adjacent the guide wire port to enable a guide wire to be introduced into said inner tube, and wherein a passageway extends through said fused laminate from said proximal shaft to said inflation lumen; and

    a stiffening wire positioned within said tubular shaft, said stiffening wire having a distal end permanently anchored in said wire retention section.

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