| 摘要 |
A catheter in accordance with my invention comprises a temporary self-expanding cutting stent and a retractable sheath for containing the self-expanding cutting stent. The catheter is positioned such that the self-expanding cutting stent is within a stenosis or other blockage within an artery. The retractable sheath is then retracted, and the self-expanding cutting stent expands, cutting through stenotic tissue, scar tissue, or other tissue blocking the artery. A second retractable structure, such as a coil, a ring, a screw or a second self-expanding cutting stent extends through the interior of the temporary self-expanding is cutting stent, and cuts any tissue extending through the struts of the temporary self-expanding cutting stent, and pulling that tissue to a location within the sheath. The sheath is then pushed back over the self-expanding cutting stent, and the catheter is then retracted. |
