| 摘要 |
An embolic cutting catheter includes a catheter body having a passage defined therein and supporting an inflatable balloon on the exterior surface thereof. A generally cylindrical housing is received within the interior passage of the catheter body and supports a rotating cutter head assembly having a conical member defining a spiral groove therein. The conical member is secured to a pair of cylindrical members each having spiral grooves defined therein and an abrasive cylindrical surface is positioned between the cylindrical portions. The spiral grooves of the conical member and cylindrical portions cooperate to carry embolic plaque particles into the region of the abrasive cylinder wherein the particles are pulverized and thereafter carried outwardly from the catheter to be disposed of. The conical cutting head defines a rounded apex to avoid injury to the vessel walls of the patient's artery. For added pulverizing capability, the abrasive cylinder is surrounded by an abrasive surface within which the abrasive cylinder rotates.
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