achieve endoscopic procedures more safely and less invasively, an operative
strategy with ultrasound-assisted neuroendoscopic surgery is described. Th
e improvement in the endoscope unit is that endoscopic viewing can be stopp
ed on the display, anytime we choose and simultaneously visualize the ongoi
ng view on the same display. The ultrasound unit, using a miniature Doppler
probe, is to able to detect even invisible vessels in real-time, easily an
d non-invasively. The information from both units can be switched intraoper
atively, whenever required.