Abstract
Objective To explore the effect of Ginkgo leaf extract and dipyridamole injection combined with methylcobalam on nerve conduction velocity of nerve entrapment sites in the upper limbs in patients with diabetic peripheral neuropathy (DPN).Methods Two hundred and eight type 2 diabetic patients with DPN,admitted to our hospital from January 2008 to June 2011,were selected in our study,and randomly divided into an observation group (n=103) and a control group (n=105).Dietary regulation,exercises and glucose control were conducted in both groups.In the control group,patients were given methylcobalamin at the dose of 1000 μg,three times a day.In the observation group,patients were given methylcobalamin (1000 μg,three times a day) plus Ginkgo leaf extract and dipyridamole injection of 20 mL once a day.All treatments lasted for four weeks.The sensory conduction velocity (SCV),motor conduction velocity (MCV) and sensory nerve action potential (SNAP),compound muscle action potential (CMAP) and distal motor latency (DML) of median and ulnar nerves were measured and compared before and four weeks after the treatments.Results The DML was shortened,and SCV and amplitude of median nerve were improved.Segmental MCV of above-below elbow,SCV and amplitude of ulnar nerve were significantly improved in both groups after the treatments as compared with those before treatment (P＜0.05); the total effective rate of the observation group was significantly higher than that of the control group (P＜0.05).Conclusion The nerve electrophysiological characteristics of nerve compression sites in the upper limbs is sensitive for assessing injury and treatment effect in patients with DPN; the combination of Ginkgo leaf extract and dipyfidamole injection and methylcobalam is superior than methylcobalam alone in improving the nerve conduction of diabetic patients. Key words: Nerve entrapment; Nerve electrophysiology; Ginkgo leaf extract and dipyridamole; Methylcobalamin; Diabetes peripheral neuropathy
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