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KMID : 0391520070150020162
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Journal of the Korean Child Neurology Society
2007 Volume.15 No. 2 p.162 ~ p.169
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Prognostic Value of Electrophysiologic Tests in Children with Facial Nerve Palsy
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Hong Eun-Hui
Kim Jung-Mi
Kwon Soon-Hak
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Abstract
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PURPOSE: This study was aimed to evaluate the value of electrophysiologic tests for determining prognosis in children with facial nerve palsy.
METHODS: We retrospectively analyzed 37 children diagnosed as the facial nerve palsy at the pediatric neurology clinic, Kyungpook National University Hospital from January 1, 2000 to March 31, 2007.
RESULTS: A total of thirty seven children were involved in the study(male to female 21:16, and the mean age 87.5 months). Among those twenty one had electrophysiologic tests. As compared with the normal values, the amplitude decreased by 54.5%(0.6+/-0.5 mV) and the latency was prolonged by 11.0%(3.6+/-0.5 msec) in electroneurography(ENoG). Early response(R1) was absent in 15 out of 21(71.4%) and ipsilateral response(R2) was absent in 19 children(90.5%). As compared with the children who had the decrease of amplitude 90% or less in ENoG, the children with the decrease of amplitude greater than 90% showed poor recovery(100% vs 60%, P<0.05) and longer duration of follow-up(43.7+/-30.0 days vs 184.00+/-196.8 days, P<0.05). All children who had R1 and R2 responses in the Blink test were completely recovered from the illness, but they were not statistically different from the other groups.
CONCLUSION: Decrease of amplitude in ENoG and responsiveness in the Blink test can be important prognostic determinants in children with facial nerve palsy, but further studies are needed.
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KEYWORD
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Facial nerve palsy, Electroneurography, Blink test
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