| 摘要 |
A balloon dilatation catheter of the mono-rail type includes a distal mono-rail section traversing a dilatation balloon of the catheter, and a sheath member slidably movable axially of the remainder of the catheter and having a sheath section receiving an axial portion of the guide wire to in a first position effectively increase the mono-rail length of the catheter, and in a second position reduce the mono-rail length of the catheter to the length of the mono-rail section.
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