| 摘要 |
A device and method for cutting tissue to a precise depth in which a surgical blade with a rounded cutting edge, including a guard to limit the depth of penetration of the blade, is operatively connected to a handle. The device and method are particularly adapted to an endoluminal knife for cutting only the intima and media layers of a blood vessel wall during a endarterectomy procedure where the non-incised tissue is protected by the guard as the blade passes along the vessel to the point of incision. The angle of the blade may be fixed relative to the handle, or may be controllably varied by a movable cord catheter from an axial, non-contact position for the insertion and removal of the device into the artery to a radial or longitudinal, cutting position once the blade is in the desired location. Once the blade is embedded into the tissue, the device may be rotated by the handle, or by the rotation of the lumen or multilimenal catheter through which the knife has been inserted into the artery.
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