| 摘要 |
<p>A recanalizing catheter (1, 61, 101) comprising a very small diameter, elongate, flexible tubular member (14) having a working tool (3, 62) at a distaiend. A flexible drive assembly (5, 88, 109, 110) is located within the tubular member to power the tool. The drive assembly includes centering means (35, 109, 110) to keep the drive means so that the means may be rotated at high speed and the member may be bent through various radii of curvature without adverse effect. The centering means may comprise bearings (35) held longitudinally apart by spacers (36) or a helical wire (91, 109 or 110).</p> |
