| Prognostic Value of Electrophysiologic Tests in Children with Facial Nerve Palsy. |
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Eun Hui Hong, Jung Mi Kim, Soon Hak Kwon |
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Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea. shkwon@knu.ac.kr |
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| Abstract |
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. |
| Key Words:
Facial nerve palsy, Electroneurography, Blink test |
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