Intraoperative monitoring of the brainstem state during basal tumor removal, anesthesia specifics, and vital functions (report 2)

Functional state of the brain stem during neurosurgical removal of the basal tumor was controlled via registration of short-latency brainstem auditory evoked potentials (BAEP). It was shown that amplitude parameters of BAEP correlate with arterial pressure values and respond to administration of drugs for hemodynamic regulation. Alterations in the BAEP amplitude delay relative to alterations in arterial pressure, therefore changes in the functional status of the brainstem are not primary ones. Results speak for the absence of significant irritating or inhibitory effect of laser surgical manipulation on the brainstem. Short-time decrease in the BAEP and the increase in its delay not associated with the arterial pressure decrease and followed by the amplitude increase persisting till completion of the surgery do not present unfavorable prognostic signs.

Tsvetovsky S.B. – candidate of biological sciences, head of neurophysiological laboratory, e-mail: scvetovskiy@niito.ru

Stupak V.V. – doctor of medical sciences, head of the clinic for neurosurgery, e-mail: vstupak@niito.ru