| 摘要 |
<p>An apparatus and method for treating an occlusion or constriction, such as a stenosis in a blood vessel or other conduit in the body, as well as an apparatus and method for treating a tumor or cancerous area occurring around a conduit or duct in the body. The apparatus (10) includes a catheter (12) provided with a centering balloon (14) including a catheter centering balloon (41) encircling a portion of the catheter (12) near its distal end (15). This centering balloon (41) contains a plurality of thin, spoke-like members (44, 46, 48, 50). A second dilatation balloon attached to the surface of the catheter is used to treat the stenosed area. A radioactive source of material (28) is included for treating the stenosis or cancer.</p> |
