Twisted ribbon wire guidewire coil

Patent metadata

Field	Value
Publication number	US-9352131-B2
Application number	US-201514620447-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Aug 23, 2010
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

A medical guidewire having distal tip coil that includes a twisted ribbon wire construction. The distal tip coil is mounted to the distal end of the distal core section of the guidewire. The coil is made from a flat ribbon wire with a polygonal, preferably rectangular, cross-section that is twisted along the length of the wire. The twisted, flat ribbon wire creates a tip coil that has a roughened, undulating surface at the outer circumference that, whether coated or bare, is perceptible to the physician or cardiologist when pushing or torquing the guidewire in an interventional procedure.

First claim

I claimed:

1. A method for forming an intraluminal medical guidewire, comprising:
providing a stationary, cylindrical core having a longitudinal axis A;
forming a coil by wrapping onto the stationary cylindrical core a single strand of a wire from a wire supply reel having an axis B;
anchoring a free end of the wire to the stationary cylindrical core;
moving the wire supply spool continuously about axis A of the stationary cylindrical core to form 360° coils of the wire onto the stationary cylindrical core; and
revolve the wire supply spool about an axis C to impart a twisted shape to each coil on the stationary cylindrical core.

2. The method for forming an intraluminal medical guidewire of claim 1 , wherein axis C is perpendicular to axis B.

3. The method for forming an intraluminal medical guidewire of claim 2 , wherein the wire has a polygonal cross-sectional shape so that the coils have a shape in the form of a helical twist.

4. The method for forming an intraluminal medical guidewire of claim 3 , wherein the polygonal cross-sectional shape of the wire is a rectangular cross-sectional shape.

5. The method for forming an intraluminal medical guidewire of claim 3 , wherein the polygonal cross-sectional shape of the wire includes a cross-sectional shape selected from the group of cross-sectional shapes consisting of a rectangle, a square, a pentagon, or a hexagon.

6. The method for forming an intraluminal medical guidewire of claim 1 , wherein the 360° coils are arranged to be at least one of overlapping, tightly packed, and spaced apart.

7. The method for forming an intraluminal medical guidewire of claim 1 , wherein each 360° coil undergoes 1 to 10 revolutions of the wire supply reel about axis C.

8. The method for forming an intraluminal medical guidewire of claim 2 , wherein the coil wire has a constant outside diameter.

Assignees

• Abbott Cardiovascular Systems

Inventors

• Brown Daniel G

Classifications

• A61M2025/09166

  having radio-opaque features · CPC title

• A61M2025/09108

  Methods for making a guide wire · CPC title

• A61M2025/09083

  having a coil around a core · CPC title

• Y10T29/49826

  Assembling or joining · CPC title

• A61M25/09 Primary

  Guide wires · CPC title