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Flow-directed catheter

  • US 6,524,299 B1
  • Filed: 04/09/1997
  • Issued: 02/25/2003
  • Est. Priority Date: 04/09/1997
  • Status: Expired due to Term
First Claim
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1. A blood-flow directable catheter constructed of materials and having size and flexibility such that said blood-flow directable is directable to a target site within the vasculature of the human body by blood flow within that vasculature which blood-flow directable catheter comprises an elongate tubular member having a proximal end and a distal end, a length between said proximal end and a distal end, said elongate tubular member comprising:

  • a.) a distal segment made of a thermoplastic polymer having a modulus of elasticity which renders said distal segment relatively more flexible than both an intermediate segment and a proximal segment, b.) an intermediate segment made of a thermoplastic polymer having a modulus of elasticity which renders said intermediate segment relatively more flexible than said proximal segment and less flexible than said distal segment and wherein said intermediate segment has a relatively constant diameter, c.) a proximal segment comprising a thermoplastic polymer having a modulus of elasticity which renders said proximal segment relatively less flexible than said intermediate segment and said distal segment and wherein said proximal segment has a relatively constant diameter, d.) a tapered joint joining said intermediate segment and said proximal segment, and e.) a tapered joint joining said intermediate segment and said distal segment.

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