Analysis of electromyography examination in patients with type II diabetes mellitus and its clinical relating factors

Objective To study the relationship between electromyogram examination in patients with type Ⅱ diabetes mellitus and its clinical relating factors. Methods Using Dantec Keypoint to measure nerve conduction velocity(NCV)and electromyography(EMG). Using BAYER 7150 Hitachi full automatic biochemical analyzer to measure blood glucose and lipids. A total of 110 type Ⅱ diabetic patients were divided into two groups as NCV-positive group and NCV-negative group according to the results of NCV. 60 normal health controls were included. Relating factors such as course of disease, age, blood glucose, blood lipids and blood pressure were contrasted in patients and controls. Results There was a significant difference of NCV between patients and controls(P0.05). An obvious difference of age and disease course was noted between NCV-positive and NCV-negative groups(P0.01, P0.001). No obvious difference of blood glucose and blood lipids level was found between the two groups. In NCV-positive group, the average value of SCV was less than the normal value. The MCV was normal and significant difference was observed between SCV and MCV(P0.05).The longer the disease course, the more obvious the changes of NCV. A close correlation was noted between the degree of sensory nerve damage and motor nerve damage. In the NCV-positive group, eight patients with abnormal EMG change were found with obvious clinical peripheral nerve symptoms.Among the 110 patients, 8(7.27%)had simple carpal tunnel syndrome(CTS). Conclusion The changes of peripheral nerve conduction velocity, amplitude, potential and EMG are correlated with the course of disease significantly. It has certain correlation with ages, but has not correlated with the level of blood glucose, blood lipid and blood pressure. A close correlation is noted between the degree of sensory nerve damage and motor nerve damage. The rate of CTS in patients is higher than that of average people. Electromyography examination plays an important role in the diagnosis of diabetic peripheral neuropathy in early stage.