The delayed resolution for hemifacial spasm

Objective The purpose of this research is to find a credible guideline for prognosis and re-exploration of Hemifacial spasm.Methods To analyze the data of 300 patients with delayed resolution after MVD.Descriptive statistics were performed with SPSS 15.0.Results The mean of time of delayed resolution was 129.0 days,M =50.0 days.The 95％ confidence interval(95％ CI) of delayed resolution was (105.4,152.5) days.Age (P =0.045),course of disease (P =0.029),and post-surgery tic severity (P ＜ 0.001) were significant influences on the delayed resolution.Silent period was found in 42.7％ patients.The mean of silent period was 1.36 days,57.3％ within 24 hours.Conclusion The statistical time of cure rate should not be less than 2 years.Re-operation was reasonable if the symptoms persist more than 2 years(except for the cases of symptoms were relieved) or tend to get worse progressively when followed at least six months.The follow time would been prolonged for elder and/or long suffering. Key words: Delayed resolution ;  Hemifacial spasm;  Microvascular decompression;  Re -operation