Intraoperative transcranial facial motor evoked potential monitoring in surgery of cerebellopontine angle tumors predicts early and late postoperative facial nerve function

Autor: Kiyoshi Saito, Jun Sakuma, Kensho Iwatate, Mudathir Bakhit, Takeshi Itakura, Masazumi Fujii, Masahiro Ichikawa, Takao Kojima, Taku Sato, Ryo Hiruta
Rok vydání: 2020
Předmět:
Adult
Male
medicine.medical_specialty
Adolescent
Intraoperative Neurophysiological Monitoring
Facial Muscles
Cerebellopontine Angle
050105 experimental psychology
Neurosurgical Procedures
03 medical and health sciences
Young Adult
0302 clinical medicine
Postoperative Complications
Physiology (medical)
medicine
Humans
0501 psychology and cognitive sciences
Postoperative Period
Evoked potential
Aged
Retrospective Studies
Aged
80 and over
Facial Nerve Injuries
business.industry
Electromyography
05 social sciences
Neuroma
Acoustic
Middle Aged
Cerebellopontine angle
Evoked Potentials
Motor
Facial nerve
Sensory Systems
Amplitude ratio
Surgery
Facial Nerve
Neurology
Postoperative Periods
Female
Neurology (clinical)
Facial nerve function
business
030217 neurology & neurosurgery
Cerebellopontine angle tumors
Zdroj: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology. 132(4)
ISSN: 1872-8952
Popis: Objective We propose a novel method that predicts facial nerve function (FNF) calculated from the drop and recovery of facial motor evoked potential (FMEP) amplitude ratio during the surgery of cerebellopontine angle tumors. Methods We enrolled 73 patients with cerebellopontine angle tumor, and used a biphasic, constant current, and suprathreshold stimulation (BCS) protocol to record FMEP of the orbicularis oris. We measured the intraoperative minimum-to-baseline amplitude ratio (MBR), the final-to-baseline amplitude ratio (FBR), and the recovery value (RV). RV was measured by subtracting MBR from FBR. Using those values, we evaluated FNF both at early postoperative (EP) and late postoperative (LP) periods. Results We successfully obtained 62 FMEP readings. Facial palsies occurred in 22 patients during the EP period, and 14 patients recovered during the LP period. Both MBR and FBR showed a significant correlation with FNF in the EP period. RV showed a good predictive power of FNF recovery during the LP period for the first time. Conclusions RV is a new and useful predictor of FNF recovery. MBR can be an intraoperative predictor of FNF in the EP period. Significance FNF outcome in the early and late postoperative periods can be predicted by FMEP.
Databáze: OpenAIRE
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