| abstract |
Devices, methods, kits, and methods remove occlusive substances (O) from vessels (w) and other body cavities (BV). An extensible basket (18, 20) may be used in concert with a radially extensible shear member. The helical struts (30) of each basket can wrap in a uniform circumferential direction. The struts (30) can be independently plastic, allowing the shear members (18, 20) to shrink together in the axial direction. The inner basket (18) is rotatably driven and distal for advancement into an obstruction that obstructs access to an axial pump (14 ') and / or guidewire (GW) extending proximally from the shearing member. An intrusion (122) may be used. The struts (30) may slide across each other substantially continuously and may be sufficiently advanced for very effective thrombus removal. The rotationally stable and axially plastic outer basket (20) may provide a stable and limited atherectomy procedure. |