Use of ultrasonically guided probes and catheters in neurosurgery.

The utility of two-dimensional, real-time intraoperative ultrasound sector scanning for purposes of tumor localization, tumor biopsy, cyst drainage, and placement of ventricular shunt catheters in 13 patients is demonstrated. The technique allows the neurosurgeon to assess the progress of the procedure as it happens. The surgeon can observe biopsy probes entering tumors, thus confirming the location of the tissue sample. Shunt catheters can be easily guided into optimal positions for drainage. The technique is simple and safe, and could become a valuable aid in certain types of neurosurgical operations.