Rotational atherectomy device
First Claim
Patent Images
1. A method of forming an elongate, flexible drive shaft, the method comprising:
- a. forming an inner helical coil by winding a plurality of wires about a forming mandrel, the resulting inner helical coil having a lumen and a proximal end;
b. forming an outer helical coil by winding a single wire with a mandrel-less coil forming machine, the resulting outer helical coil having a lumen and a proximal end; and
c. positioning the inner helical coil within the lumen of the outer helical coil to define a drive shaft, the inner and outer helical coils being oriented such that the inner helical coil is wound in a direction opposite that in which the outer helical coil is wound.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of forming an elongate, flexible drive shaft which has utility as a rotational atherectomy device. In accordance with this method, an inner helical coil having a lumen and a proximal end is formed by winding a plurality of wires about a forming mandrel. An outer helical coil having a lumen and a proximal end is formed by winding a single wire with a mandrel-less coil forming machine. The inner helical coil is positioned within the outer helical coil to define a drive shaft. The inner and outer helical coils are oriented such that the inner helical coil is wound in a direction opposite that in which the outer helical coil is wound.
235 Citations
26 Claims
-
1. A method of forming an elongate, flexible drive shaft, the method comprising:
-
a. forming an inner helical coil by winding a plurality of wires about a forming mandrel, the resulting inner helical coil having a lumen and a proximal end;
b. forming an outer helical coil by winding a single wire with a mandrel-less coil forming machine, the resulting outer helical coil having a lumen and a proximal end; and
c. positioning the inner helical coil within the lumen of the outer helical coil to define a drive shaft, the inner and outer helical coils being oriented such that the inner helical coil is wound in a direction opposite that in which the outer helical coil is wound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A method of forming an elongate, flexible rotational atherectomy device, the method comprising:
-
a. forming an inner helical coil by winding a plurality of wires about a forming mandrel, the inner helical coil having a lumen, an intermediate segment and a proximal end, at least some adjacent wire turns being spaced from one another along at least part of the intermediate segment;
b. forming an outer helical coil by winding a single wire with a mandrel-less coil forming machine, the resulting outer helical coil having a lumen, an intermediate segment and a proximal end, the diameters of the wire turns being gradually increased distally through a proximal portion of the intermediate segment and gradually decreased distally through a distal portion of the intermediate segment, thereby defining an enlarged diameter segment of the outer helical coil;
c. positioning the inner helical coil within the lumen of the outer helical coil to define a drive shaft, the intermediate segment of the inner helical coil being positioned generally within the intermediate segment of the outer helical coil, the inner and outer helical coils being oriented such that the inner helical coil is wound in a direction opposite that in which the outer helical coil is wound; and
d. providing a length of the enlarged diameter segment of the outer helical coil with an abrasive external surface to define an abrasive segment of the drive shaft. - View Dependent Claims (24, 25, 26)
-
Specification