| 摘要 |
<p>SURGICAL INSTRUMENT FOR OPERATION OF ANTERIOR FENESTRATED SPONDYLODESIS IN VERTEBRAL OSTEOCHONDROSIS A surgical instrument for the surgical operation of anterior fenestrated spondylodesis comprising an elongated hollow body with a handle at one end, and a detachable hollow cylindrical cutter with a cutting edge, at the other. Incorporated within the body is a shaft with a knife on the end situated within the cavity of the cutter. The instrument has a device for locking the shaft in the body in a position whereat the blades and cutting edge of the knife and the cutter lie in the same plane. The cutter is intended for excising two transplants in the shape of cylindrical segments from two adjacent vertebrae, and the knife, for undercutting them, once they are formed by the cutter. Also situated in the cutter's cavity is a limit flange secured on the shaft, which comes in contact with the surface of the vertebral bodies and restricts the depth to which the knife descends into the intervertebral slit and, together with a stop on the rear end of the body interacting with the end of the shaft, ensures the right depth of the cutter's penetration into the adjacent vertebral bodies. The instrument is reliable, does not endanger, during surgery, nearby large vessels and nerve formations, and precludes the penetration of the knife into the vertebral canal. The instrument permits the operation to be performed on any region of the spinal column.</p> |
