| 摘要 |
An apparatus for removing obstructions within a blood vessel of a patient using mechanical motion. The device has a catheter which is inserted into the vascular system at a convenient point, such as the femoral artery. The distal end of the catheter is advanced until it reaches the occlusion. A central lumen within the catheter contains a coil spring which functions as a flexible shaft to couple rotational motion provided by an electric motor or other source of rotational motion at the proximal end of the catheter to a cutting head at the distal end of the catheter. As the cutting head is rotated, the occlusion is milled away by the internal cutting edges of the cutting head. The particles cut from the occlusion are forced by the rotational motion of the cutting head into one of a number of outer lumens of the catheter. A vacuum is applied to the proximal end of some of the outer lumens to remove the particles from the patient's body.
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