ISSN:
0942-0940
Keywords:
Brainstem acoustic evoked potentials
;
intraoperative monitoring
;
cerebellopontine angle
;
somatosensory evoked potentials
;
neurovascular decompression
;
acoustic neurinoma
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary In 135 cases of posterior fossa surgery almost exclusively in the cerebellopontine angle (CPA) intraoperative monitoring of brainstem acoustic evoked potentials (BAEP) and partly somatosensory evoked potentials (SEP) was performed. The series consisted of 20 microvascular decompressions, 63 acoustic neurinomas, 7 vascular lesions and 45 other space occupying lesions, mostly in the CPA. BAEP monitoring alone was employed in 76 cases, combined BAEP und SEP monitoring less frequently. The technique of anaesthesia and intraoperative monitoring is presented in detail including an analysis of technical problems (17 in 135=13% of cases) and technical failures (11 of 135=8%). The results of monitoring brainstem pathways contralateral to the lesion are detailed. It is concluded that the technical principles of evoked potential monitoring in posterior fossa surgery are well established. The applications and limits of this technique including its modifications are described.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01407170
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