Tissue-removing catheter and tissue-removing element with depth stop
First Claim
1. A tissue-removing element configured for a tissue-removing catheter, the tissue-removing element comprising:
- a tissue-removing element body having opposite first and second axial ends and an axis extending through the first and second axial ends;
an annular cutting edge at the first axial end of the tissue-removing element body extending around the axis of the tissue-removing element body;
an annular depth stop at the first axial end of the tissue-removing element body extending around the axis of the tissue-removing element body and being disposed radially inward of the cutting edge relative to the axis of the tissue-removing element body, the annular depth stop having an engagement surface at an axial end thereof configured to restrict a cutting depth of the annular cutting edge, wherein the annular cutting edge and the annular depth stop intersect one another at an annular junction, wherein the annular cutting edge and the annular depth stop extend directly from the annular junction in the same axial direction, wherein the annular depth stop has a uniform cross-sectional shape around the axis of the tissue-removing element body; and
a concave tissue-receiving depression defined by the first axial end of the tissue-removing element body, wherein the tissue-receiving depression is radially inward of the annular depth stop and the tissue-receiving depression is radially inward of the annular junction, and wherein the tissue-receiving depression is configured to direct removed tissue in the axial direction.
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Accused Products
Abstract
A tissue-removing catheter includes a tissue-removing element operably connected to a drive shaft for rotation of the tissue-removing element about an axis of rotation in a cutting direction. The tissue-removing element includes a cutting edge that extends around the axis of rotation and a depth stop that extends around the axis of rotation radially inward of the cutting edge relative to the axis of rotation. The depth stop defines an engagement surface adapted to engage a hard object and thereby limit the depth at which the cutting edge cuts into the hard object. In use, when the cutting edge cuts into a hard object, the depth stop engages the hard object to limit the cutting depth.
622 Citations
18 Claims
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1. A tissue-removing element configured for a tissue-removing catheter, the tissue-removing element comprising:
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a tissue-removing element body having opposite first and second axial ends and an axis extending through the first and second axial ends; an annular cutting edge at the first axial end of the tissue-removing element body extending around the axis of the tissue-removing element body; an annular depth stop at the first axial end of the tissue-removing element body extending around the axis of the tissue-removing element body and being disposed radially inward of the cutting edge relative to the axis of the tissue-removing element body, the annular depth stop having an engagement surface at an axial end thereof configured to restrict a cutting depth of the annular cutting edge, wherein the annular cutting edge and the annular depth stop intersect one another at an annular junction, wherein the annular cutting edge and the annular depth stop extend directly from the annular junction in the same axial direction, wherein the annular depth stop has a uniform cross-sectional shape around the axis of the tissue-removing element body; and a concave tissue-receiving depression defined by the first axial end of the tissue-removing element body, wherein the tissue-receiving depression is radially inward of the annular depth stop and the tissue-receiving depression is radially inward of the annular junction, and wherein the tissue-receiving depression is configured to direct removed tissue in the axial direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A tissue-removing catheter for removing tissue from a body lumen, the tissue-removing catheter comprising:
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a rotatable driveshaft; and a tissue-removing element coupled to the rotatable driveshaft for rotating the tissue-removing element about an axis of rotation, the tissue-removing element having opposite first and second axial ends spaced apart along the axis of rotation, the tissue-removing element comprising; an annular cutting edge at the first axial end of the tissue-removing element extending around the axis of rotation of the tissue-removing element; an annular depth stop at the first axial end extending around the axis of rotation of the tissue-removing element and being disposed radially inward of the cutting edge relative to the axis of rotation of the tissue-removing element, the annular depth stop having an engagement surface at an axial end thereof configured to restrict a cutting depth of the annular cutting edge, wherein the annular cutting edge and the annular depth stop intersect one another at an annular junction, wherein the annular cutting edge and the annular depth stop extend directly from the annular junction in the same axial direction, wherein the annular depth stop has a uniform cross-sectional shape around the axis of the tissue-removing element body; and a concave tissue-receiving depression defined by the first axial end of the tissue-removing element body, wherein the tissue-receiving depression is radially inward of the annular depth stop and the tissue-receiving depression is radially inward of the annular junction, wherein the tissue-receiving depression is configured to direct removed tissue in the axial direction. - View Dependent Claims (17, 18)
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Specification