| 主权项 |
1. A catheter for removing tissue from a body lumen, comprising:
an elongate catheter body configured for insertion into a body lumen of a subject, the catheter body having opposite distal and proximal ends, a longitudinal axis extending between the distal and proximal ends, and an interior passage extending along the longitudinal axis; and a cutter located generally at the distal end of the catheter body, the cutter having a proximal end portion, a distal end portion, and a longitudinal axis extending between the proximal and distal end portions, the cutter being rotatable relative to the catheter body generally about its longitudinal axis, the cutter including
an annular cutting tip at the distal end portion of the cutter for removing tissue from the body lumen,an axial cavity defined by an interior surface of the cutter extending proximally from the annular cutting tip toward the proximal end portion of the cutter, andan eccentric opening extending from the central cavity through the cutter to allow tissue removed from the body lumen by the annular cutting tip to pass proximally through the eccentric opening toward the interior passage of the catheter body, wherein the eccentric opening is offset from the longitudinal axis of the cutter. |
