Tissue-removing catheter with improved angular tissue-removing positioning within body lumen

摘要

A tissue-removing catheter for removing tissue from a body lumen includes a tissue-removing. The tissue-removing element may be coupled to a first longitudinal body portion of the catheter body. The first longitudinal body portion may be rotatable along its length and relative to a second longitudinal body portion to adjust the angular position of the first longitudinal body portion relative to the second longitudinal body portion. An angular-positioning mechanism may be operatively connected to the tissue-removing element for rotating the tissue-removing element relative to the second longitudinal body portion about a rotational axis to adjust an angular tissue-removing position of the tissue-removing element, relative to the longitudinal axis of the body lumen, from an first angular tissue-removing position to a second angular tissue-removing position offset from the first angular tissue-removing position.

主权项

1. A tissue-removing catheter for removing tissue from a body lumen having a longitudinal axis, the tissue-removing catheter comprising:
a catheter body configured for insertion in the body lumen, the catheter having a proximal end, a distal end, a longitudinal axis extending between the proximal and distal ends, wherein the catheter body includes a first longitudinal body portion adjacent the distal end, and a second longitudinal body portion proximal of the first longitudinal body portion, the first longitudinal body portion defining a side opening; a tissue-removing element disposed in the first longitudinal body portion of the catheter body, wherein the tissue-removing element is extendable outside the first longitudinal body portion through the side opening; and a tissue-removing driveshaft extending longitudinally within the first and second longitudinal body portions of the catheter body and configured for rotation about its longitudinal axis relative to the catheter body, the tissue-removing driveshaft operatively connected to the tissue-removing element to impart rotation to the tissue-removing element relative to the catheter body, wherein the first longitudinal body portion is rotatable about an axis extending along its length and relative to the second longitudinal body portion to adjust the angular position of the first longitudinal body portion and the side opening relative to the second longitudinal body portion, an angular-positioning mechanism disposed between the first and second longitudinal body portions and operatively connected to the first longitudinal body portion and configured to rotate the first longitudinal body portion about the axis extending along its length and relative to the second longitudinal body portion to adjust the angular position of the first longitudinal body portion and the side opening relative to the second longitudinal body portion.