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Infusion guidewire including proximal stiffening sheath

  • US 5,184,627 A
  • Filed: 01/18/1991
  • Issued: 02/09/1993
  • Est. Priority Date: 01/18/1991
  • Status: Expired due to Term
First Claim
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1. A flexible elongated medical infusion guidewire having proximal and distal portions, adapted for delivering pressurized fluid medicaments to a site within a body vessel, comprising:

  • a flexible elongated helically arranged coil of round wire having a proximal portion and a distal portion, and defining a central lumen therethrough having a distalmost end blocked by a ball weld thereon;

    a first sheath stiffening means comprised of a single flexible layer or polyimide film in a tubular configuration disposed immediately about and co-extensive with substantially all of just said proximal portion of just said helically arranged coil;

    a second sheath enclosure means disposed immediately about said first sheath means and being co-extensive therewith and with all of said distal portion of said helically arranged coil; and

    a plurality of dispersion means arranged within said distal portion of said second sheath.

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