The Diagnostic Significance Of Electroneurophysiology In Early Stage Diabetic Peripheral Facial Paralysis

ObjectiveTo explore the diagnostic significance of electroneurophysiology in patients with early stage of diabetic peripheral facial paralysis.Methods The blink reflex (BR),electromyography (EMG) and electroneurography (ENG) had been detected in 32 patients with peripheral facial paralysis complicated diabetes mellitus (DM) with the early stage from 4 days to 7 days. The contrast group was composed of 30 patients with peripheral facial paralysis without diabetes mellitus.Results(1)Blink reflex (BR):In all the patients, the abnormal rate was 100%. In DM, the ipsilateral R1, R2 and R2'waves were absent in 12 cases, and the latencies of R1, R2 and R2'were prolonged in 20 cases. In the contrast group, the ipsilateral R1, R2 and R2'waves were absent in 9 cases, and the latencies of R1, R2 and R2' were prolonged in 21 cases. There is a marked difference about BR between the two groups (p<0.05).(2)Electromyography (EMG):In DM, the abnormal rate was 62.5%. Detection of EMG displayed that polyphase wave increased, recruitment potential reduced and spontaneous potential appeared on the ill side. In the contrast group, the abnormal rate was 56.7%. There is a marked difference about EMG between the two groups (p<0.05).(3)Electroneurography (ENG):In DM, the abnormal rate was 34.4%, but the latent period M wave on the ill side was prolonged. There is a marked difference about the latent period M wave between the ill side and the healthy side (p<0.05). In the contrast group, the abnormal rate was 36.7%, but the latent period M wave on the ill side was prolonged. There is a marked difference about the latent period M wave between the ill side and the healthy side (p<0.05). There is not a marked difference about ENG between the two groups (p>0.05).4. Conclusion(1) Blink reflex could be used as an objective index for the early diagnosis of facial paralysis.(2)In the early stage of diabetic peripheral facial paralysis, Blink reflex could reflect the extent of the damage about facial nerve.(3)EMG could be used as the secondary index for the early diagnosis of diabetic peripheral facial paralysis.(4)EMG could not be used as a sensitive index during the early diagnosis of diabetic peripheral facial paralysis.