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US 10,478,213 B2Granted
Tissue-removing catheter with adjustable cross-sectional dimension
AssigneeCovidien LP
InventorThomas McPeak
Life of this patent
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Abstract
A tissue-removing catheter includes a drive shaft and a tissue-removing head. The tissue-removing head is at the distal end of the drive shaft and is configured to rotate about a longitudinal axis of the drive shaft. The tissue-removing head is selectively adjustable from an initial cross-sectional dimension to an expanded cross-sectional dimension larger than the initial cross-sectional dimension.
Claims13
A medical device comprising:
- a tissue-removing catheter comprising:
- a drive shaft having opposite proximal and distal ends and configured for rotation about a longitudinal axis;
- a tissue-removing head at the distal end of the drive shaft, wherein the tissue-removing head is configured to rotate about the longitudinal axis, and wherein the tissue-removing head is selectively adjustable from an initial cross-sectional dimension to an expanded cross-sectional dimension larger than the initial cross-sectional dimension;
- and
- an expansion mechanism configured to selectively adjust the tissue-removing head from the initial cross-sectional dimension to the expanded cross-sectional dimension, wherein the expansion mechanism includes an elastically deformable member disposed inside the tissue-removing head, wherein the elastically deformable member is selectively elastically compressible in a longitudinal direction to increase a cross-sectional dimension of the elastically deformable member from an initial cross-sectional dimension to an expanded cross-sectional dimension greater than the initial cross-sectional dimension when the elastically deformable member is longitudinally compressed to selectively adjust the tissue-removing head from the initial cross-sectional dimension to the expanded cross-sectional dimension;
- wherein the expansion mechanism includes an actuator and the tissue-removing catheter houses the actuator, the actuator being selectively movable axially within the tissue-removing head to elastically compress the elastically deformable member.
3 more elements
A method of debulking a body lumen, the method comprising:
- delivering a distal end of a tissue-removing catheter to a target site within the body lumen, the tissue-removing catheter including
- a drive shaft having opposite proximal and distal ends and configured for rotation about a longitudinal axis, and
- a tissue-removing head at the distal end of the drive shaft, wherein the tissue-removing head is configured to rotate about the longitudinal axis, and wherein the tissue-removing head is selectively adjustable from an initial cross-sectional dimension to an expanded cross-sectional dimension larger than the initial cross-sectional dimension;
- adjusting the tissue-removing head from the initial cross-sectional dimension to the expanded cross-sectional dimension, wherein said adjusting the tissue-removing head comprises elastically compressing an elastically deformable member disposed inside the tissue-removing head in a longitudinal direction to increase a cross-sectional dimension of the elastically deformable member from an initial cross-sectional dimension to an expanded cross-sectional dimension greater than the initial cross-sectional dimension to selectively adjust the tissue-removing head from the initial cross-sectional dimension to the expanded cross-sectional dimension;
- rotating the drive shaft about its longitudinal axis to impart rotation of the tissue-removing head, wherein the rotating tissue-removing head removes tissue from a wall of the body lumen at the target site.
2 more elements
Dependencies are inferred from the claim text.