M Fukuda1, M Oishi, T Takao, A Saito, Y Fujii. 1. Department of Neurosurgery, Brain Research Institute, University of Niigata, 1-757 Asahimachi-dori, Chuo-ku, Niigata-City 951-8585, Japan. mfuku529@bri.niigata-u.ac.jp
Abstract
OBJECTIVE: To determine whether monitoring facial nerve motor-evoked potentials (FNMEPs) elicited by transcranial electrical stimulation during skull base tumour surgery is useful for predicting facial nerve outcome. METHODS: This study analysed FNMEP findings in 26 patients with skull base tumours. Corkscrew electrodes positioned at C3 or C4 and Cz were used to deliver supramaximal stimuli (180-550 V). FNMEPs were recorded from the orbicularis oculi and oris muscles. The correlation between the final-to-baseline FNMEP ratio and postoperative facial nerve function was examined. RESULTS: Postoperative facial nerve function correlated significantly with the FNMEP ratios in the orbicularis oculi (p = 0.004) and orbicularis oris (p<0.001) muscles. An FNMEP ratio of <50% consistently predicted immediate postoperative facial palsy, although the degree of palsy differed among patients. All patients had satisfactory facial nerve function (House and Brackmann grades I and II) postoperatively if the FNMEP ratio remained at >50%. CONCLUSIONS: Intraoperative FNMEP monitoring can be useful for predicting facial nerve function after skull base surgery. This new method is a valuable adjunct to conventional facial nerve monitoring.
OBJECTIVE: To determine whether monitoring facial nerve motor-evoked potentials (FNMEPs) elicited by transcranial electrical stimulation during skull base tumour surgery is useful for predicting facial nerve outcome. METHODS: This study analysed FNMEP findings in 26 patients with skull base tumours. Corkscrew electrodes positioned at C3 or C4 and Cz were used to deliver supramaximal stimuli (180-550 V). FNMEPs were recorded from the orbicularis oculi and oris muscles. The correlation between the final-to-baseline FNMEP ratio and postoperative facial nerve function was examined. RESULTS: Postoperative facial nerve function correlated significantly with the FNMEP ratios in the orbicularis oculi (p = 0.004) and orbicularis oris (p<0.001) muscles. An FNMEP ratio of <50% consistently predicted immediate postoperative facial palsy, although the degree of palsy differed among patients. All patients had satisfactory facial nerve function (House and Brackmann grades I and II) postoperatively if the FNMEP ratio remained at >50%. CONCLUSIONS: Intraoperative FNMEP monitoring can be useful for predicting facial nerve function after skull base surgery. This new method is a valuable adjunct to conventional facial nerve monitoring.
Authors: Maura K Cosetti; Ming Xu; Andrew Rivera; Daniel Jethanamest; Maggie A Kuhn; Aleksandar Beric; John G Golfinos; J Thomas Roland Journal: J Neurol Surg B Skull Base Date: 2012-10
Authors: Orin Bloch; Michael E Sughrue; Rajwant Kaur; Ari J Kane; Martin J Rutkowski; Gurvinder Kaur; Isaac Yang; Lawrence H Pitts; Andrew T Parsa Journal: J Neurooncol Date: 2010-08-06 Impact factor: 4.130
Authors: Harminder Singh; Richard W Vogel; Robert M Lober; Adam T Doan; Craig I Matsumoto; Tyler J Kenning; James J Evans Journal: Scientifica (Cairo) Date: 2016-05-16
Authors: Tobias Greve; Liang Wang; Sophie Katzendobler; Lucas L Geyer; Christian Schichor; Jörg Christian Tonn; Andrea Szelényi Journal: Cancers (Basel) Date: 2021-12-09 Impact factor: 6.639