Guidewire
AssigneeBoston Scientific Scimed, Inc.
InventorsPETER J. PEREIRA, STEVEN E. WALAK
Life of this patent
Estimating the term…
Abstract
A guidewire includes an elongate core member having an intermediate segment, a distal segment and a proximal segment, a distal shoulder between the intermediate segment and the distal segment and a proximal shoulder between the intermediate segment and the proximal segment. A coil having a proximal end and a distal end is disposed about at least a portion of the distal segment of the elongate core member and disposed adjacent to the distal shoulder. A distal tip comprising a polymer material is disposed adjacent to the distal end of the coil and a proximal polymer member, the proximal polymer member disposed adjacent to the proximal shoulder. At least the intermediate segment and the coil have a diameter that is substantially the same.
Claims20
A guidewire comprising:
- an elongate core member having an intermediate segment, a distal segment and a proximal segment, a distal shoulder between the intermediate segment and the distal segment and a proximal shoulder between the intermediate segment and the proximal segment;
- a coil having a proximal end and a distal end disposed about at least a portion of the distal segment of the elongate core member and disposed adjacent to the distal shoulder;
- a distal tip comprising a polymer material, the distal tip disposed adjacent to the distal end of the coil;
- and
- a proximal polymer member, the proximal polymer member disposed adjacent to the proximal shoulder;
- and
- wherein at least the intermediate segment and the coil have a diameter that is substantially the same.
A guidewire, the guidewire comprising an elongate core member, the elongate core member comprising:
- an intermediate segment;
- a distal segment including a distal taper;
- a proximal segment comprising a proximal taper;
- a distal step between the intermediate segment and the distal segment;
- a proximal step between the intermediate segment and the proximal segment;
- a proximal polymeric member disposed along the proximal taper of the proximal segment and abutting the proximal shoulder;
- a polymeric reinforcing member having a proximal end and a distal end disposed about a portion of the distal segment, the proximal end of the polymeric reinforcing member abutting the distal shoulder;
- a distal tip comprising a polymer material disposed about a distal end of the distal taper and abutting the distal end of the polymeric reinforcing member;
- and
- wherein the intermediate segment and the polymeric reinforcing member have a diameter that is substantially the same.
A method of making a guidewire comprising the steps of:
- shaping an elongate core member to form a tapered proximal segment, an intermediate segment defined by a distal shoulder and a proximal shoulder, and a tapered distal segment, wherein the intermediate segment has a diameter that is larger than that of the tapered proximal segment and the tapered distal segment;
- covering the proximal tapered to the proximal shoulder of the intermediate segment by heat shrinking a polymer material thereon;
- disposing a coil having a proximal end and a distal end over at least a portion of the tapered distal segment wherein the proximal end of the coil abuts the distal shoulder of the intermediate member wherein the diameter of the intermediate member and the at least a portion of the tapered distal segment comprising the coil are substantially the same;
- and
- disposing a polymeric distal tip over the tapered portion wherein the distal tip abuts the distal end of the coil.
Dependencies are inferred from the claim text.