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Predictive Value of Facial Nerve Electrophysiologic Stimulation Thresholds in Cerebellopontine‐Angle Surgery
Author(s) -
Selesnick Samuel H.,
Carew John F.,
Victor Jonathan D.,
Heise Carl W.,
Levine Jennifer
Publication year - 1996
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1097/00005537-199605000-00022
Subject(s) - cerebellopontine angle , medicine , facial nerve , facial paralysis , stimulation , surgery , anesthesia , predictive value , radiology , magnetic resonance imaging
The predictive value of intraoperative stimulation thresholds for facial nerve function, using a constant‐current system, was examined in 49 patients undergoing resection of cerebellopontine‐angle tumors. Immediately after surgery, 75% of the 0.1‐mA threshold group, 42% of the 0.2‐mA group, and 18% of the 0.3‐mA or greater group had good (grade I or II) facial nerve function. One year after surgery, 90% of the 0.1‐mA group, 58% of the 0.2‐mA group, and 41% of the 0.3‐mA or greater group had grade I or II function. A statistically significant breakpoint of 0.2 mA was found to predict good postoperative facial function. Delayed facial paralysis occurred in 22% of patients, but the prognosis for these patients was favorable. Both current stimulation threshold and duration are necessary for a meaningful comparison of data between investigators. Laryngoscope, 106:633‐638, 1996