Prognostic value of neuroelectromyography in peripheral facial paralysis and its correlation with House-Brackman classification / 中国基层医药

ABSTRACT

Objective:To investigate the prognostic value of neuroelectromyography in peripheral facial paralysis and its correlation with House-Brackman classification.Methods:Seventy-eight patients with peripheral facial paralysis who received treatment in Yiwu Central Hospital, China between January 2016 and January 2019 were included in this study. All patients underwent neuroelectromyography. Bilateral nerve conduction velocity, latency, amplitude, and the needle electrode electrogram of orbicularis oris muscles, rbicularis oculi muscles and frontal muscles were analyzed and recorded. After 3 months of treatment, the correlation between prognosis and House-Brackman classification was analyzed.Results:Electromyography examination of 78 patients revealed among 68 patients presenting with prolonged latency, the latency on the affected side was significantly longer than that on the healthy side [(3.78 ± 0.33) ms vs. (2.89 ± 0.35) ms], t = 15.256, P < 0.001]. Among 73 patients presenting with decreased M amplitude, M amplitude on the affected side was significantly lower than that on the healthy side [(0.60 ± 0.27) mV vs. (1.83 ± 0.29) mV, t = 26.522, P < 0.001]. Among 78 patients, normal electromyography findings were observed in 2 patients and abnormal findings in 76 patients, with an abnormal rate of 97.44%. Among 78 patients, 46 patients presented with fibrillation potentials and positive sharp waves in the resting state, 40 patients presented with long duration and multiphase wave percentage of motor unit action potential in mild contraction, and 52 patients presented with abnormal recruitment potential in severe contraction. Three months of follow-up revealed that 23 out of 25 patients with mild peripheral facial paralysis had a complete recovery, with the cure rate of 92.00% (23/25), 28 out of 36 patients with moderate peripheral facial paralysis had a complete recovery, with the cure rate of 77.78% (28/36), 7 out of 10 patients with mild and moderate peripheral facial paralysis had a complete recovery, with the cure rate of 70.00% (7/10), and 3 out of 5 patients with severe peripheral facial paralysis had a complete recovery, with the cure rate of 60.00% (3/5). Conclusion:Neuroelectromyography can improve the accuracy in the identification of injury degree of peripheral facial paralysis and has a strong correlation with House-Brackman classification. Therefore, neuroelectromyography can provide a reference for diagnosis and treatment of peripheral facial paralysis.