Abstract: ［Abstract］ Objective〖HTSS〗To observe the effectiveness of low frequency electrical stimulation on the treatment of humeral shaft fracture complicated with radial nerve injury and its effect on quality of life.
Methods〖HTSS〗A total of 80 patients with radial nerve injury after humeral fracture were randomly divided into treatment group and control group. The control group was treated with conventional drugs, and the treatment group was treated with low frequency electric stimulation on the basis of the control group. Before and after treatment, the muscle strength of the extensor carpi and extensor digitorum was assessed, and the electromyogram was measured, and the MOS item short from health survey(SF-36) was evaluated.
Results〖HTSS〗After treatment, the number of extensor carpal muscle grade 4-5 in the treatment group was significantly higher than that before treatment, and the number of total extensor muscle grade 4-5 in the two groups was significantly higher than that before treatment(P＜0.05). After treatment, the muscle strength of extensor carpal muscle and total extensor finger muscle in the treatment group was much better than that in the control group(P＜0.05). After treatment, the amplitude of MCV and wave in the two groups were significantly higher than those before treatment(P＜0.05). After treatment, the amplitude of MCV and wave in the treatment group were higher than those in the control group(P＜0.05). After treatment, the scores of social functioning, physical functioning, role  emotional, mental  health and general health in the treatment group were higher than those in the control group(P＜0.05).
Conclusion〖HTSS〗Low frequency pulse electrotherapy can effectively improve the muscle strength and motor function of upper limbs in patients with radial nerve injury, and can improve the quality of life of patients.

Key words: humeral fracture, radial nerve injury, electrical stimulating therapy