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US 11,596,437 B2Granted
Rotatable medical device
AssigneeBoston Scientific Scimed, Inc.
InventorsJoel M. WasDyke, Tate Augustin
Life of this patent
Estimating the term…
Abstract
A rotational atherectomy device advanceable over a guidewire. The rotational atherectomy device includes a drive shaft rotatably extending through an outer tubular member to rotate a cutting member positioned at a distal end thereof. The rotational atherectomy device further includes an insert positioned within the cutting member for frictional contact with the guidewire.
Claims20
A rotational atherectomy device, comprising:
- an elongate shaft having a lumen extending therethrough;
- a cutting member located at a distal end of the elongate shaft;
- a drive shaft extending through the lumen of the elongate shaft and configured to rotate the cutting member, wherein the cutting member is mounted on the drive shaft;
- and
- an insert disposed within a bore of the cutting member;
- wherein the insert includes an opening extending therethrough and the cutting member includes a distal opening axially aligned with the opening of the insert;
- wherein the distal opening of the cutting member has a diameter greater than a diameter of the opening of the insert;
- wherein the insert includes an inner surface defining the opening of the insert;
- wherein at least a portion of the inner surface is non-parallel to a central longitudinal axis of the drive shaft.
6 more elements
A rotational atherectomy device, comprising:
- an elongate shaft having a lumen extending therethrough;
- a cutting member located at a distal end of the elongate shaft;
- a drive shaft extending through the lumen of the elongate shaft and configured to rotate the cutting member, the drive shaft defining a guidewire lumen extending therethrough, wherein the drive shaft is configured to rotate relative to the elongate shaft and the cutting member is fixedly attached to a distal end of the drive shaft;
- an insert disposed within a bore of the cutting member;
- wherein the insert includes an opening extending therethrough and the cutting member includes a distal opening axially aligned with the opening of the insert;
- a guidewire slidably disposed within the guidewire lumen and extending through the opening of the insert;
- wherein the distal opening of the cutting member has a diameter greater than a diameter of the opening of the insert;
- wherein a coefficient of static friction between the guidewire and an inner surface of the insert is less than 0.25.
5 more elements
A rotational atherectomy device, comprising:
- an elongate shaft having a lumen extending therethrough;
- a cutting member located at a distal end of the elongate shaft;
- a drive shaft extending through the lumen of the elongate shaft and configured to rotate the cutting member, wherein the drive shaft is configured to rotate relative to the elongate shaft and the cutting member is fixedly attached to a distal end of the drive shaft;
- and
- an insert disposed within a bore of the cutting member;
- wherein the insert includes an opening extending therethrough and the cutting member includes a distal opening axially aligned with the opening of the insert;
- wherein the distal opening of the cutting member has a diameter greater than a diameter of the opening of the insert;
- wherein an inner surface of the insert has an average surface roughness of 0.4 micrometers or less.
5 more elements
A rotational atherectomy device, comprising:
- an elongate shaft having a lumen extending therethrough;
- a cutting member located at a distal end of the elongate shaft;
- a drive shaft extending through the lumen of the elongate shaft and configured to rotate the cutting member, wherein the drive shaft is configured to rotate relative to the elongate shaft and the cutting member is fixedly attached to the drive shaft;
- and
- an insert disposed within a bore of the cutting member, wherein the insert includes an inner surface tapering outwardly in a distal direction and defining a distal opening of the insert;
- wherein the cutting member includes a distal opening axially aligned with the distal opening of the insert;
- wherein the bore of the cutting member has a diameter greater than a diameter of the distal opening of the insert.
4 more elements
Dependencies are inferred from the claim text.