Objective To test the feasibility of rescuing 2 impaired nerves by C7 nerve transfer (C7 nerve double-neurotization). Methods Using adult male Sprague-Dawley rats(200 - 250 g),a C7 nerve double-neurotization model was established. At postoperative 2, 4, 6, 8, 12th weeks the recovery underwent muscle-nerve morpholosical, histological examinations and was compared with C7 single neurotization, Results Most of the parameters in double neurotization group approximated to those in the single neurotization groups and normal control group at the end of observation period, thus indicating C7 nerve contains enough nerve fibers to provide sufficient regeneration for 2 recipient nerves. Conclusion Compared to single neurotization, C7 nerve double-neurotization has the advantage of restoring 2 nerve function at same time. This implicates its future clinical application in the treatment of severe brachial plexus avulsion injuries.

Objective To compare the clinical effects of minimally invasive percutaneous plate osteosynthesis(MIPO)and minimally invasive intramedullary nailing osteosynthesis(MINO)in the treatment of humeral shaft fractures.Methods The clinical data of 53 patients with humeral shaft fractures treated with MIPO and MINO were retrospectively analyzed.The patients were divided into MIPO group of 25 patients and MINO group of 28 patients according to differed surgical approaches.The operation time,blood loss,length of hospital stay,fracture healing time,University of California at Los Angeles(UCLA)shoulder function score at 1 year postoperatively,and Mayo elbow perform-ance score at 1 year postoperatively were compared between the two groups.Results All 53 patients successfully completed the surgery,and no postoperative complications such as surgical site infection,radial nerve injury,fracture nonunion,implant breakage,or loosening occurred.There were no sta-tistically significant differences between the two groups in terms of operation time,blood loss,length of hospital stay,fracture healing time,and Mayo elbow performance score at 1 year postoperatively(P＞0.05).The UCLA shoulder function score at 1 year postoperatively was better in the MIPO group than in the MINO group(P＜0.05).One patient in the MIPO group experienced wound fat liquefaction,and one patient in the MINO group experienced radial nerve palsy.Conclusion Both MIPO and MINO can achieve satisfactory results in the treatment of humeral shaft fractures,and both minimally invasive techniques are worthy of clinical promotion.However,MIPO has lesser impact on shoulder function.

Objective To compare the clinical effects of minimally invasive percutaneous plate osteosynthesis(MIPO)and minimally invasive intramedullary nailing osteosynthesis(MINO)in the treatment of humeral shaft fractures.Methods The clinical data of 53 patients with humeral shaft fractures treated with MIPO and MINO were retrospectively analyzed.The patients were divided into MIPO group of 25 patients and MINO group of 28 patients according to differed surgical approaches.The operation time,blood loss,length of hospital stay,fracture healing time,University of California at Los Angeles(UCLA)shoulder function score at 1 year postoperatively,and Mayo elbow perform-ance score at 1 year postoperatively were compared between the two groups.Results All 53 patients successfully completed the surgery,and no postoperative complications such as surgical site infection,radial nerve injury,fracture nonunion,implant breakage,or loosening occurred.There were no sta-tistically significant differences between the two groups in terms of operation time,blood loss,length of hospital stay,fracture healing time,and Mayo elbow performance score at 1 year postoperatively(P＞0.05).The UCLA shoulder function score at 1 year postoperatively was better in the MIPO group than in the MINO group(P＜0.05).One patient in the MIPO group experienced wound fat liquefaction,and one patient in the MINO group experienced radial nerve palsy.Conclusion Both MIPO and MINO can achieve satisfactory results in the treatment of humeral shaft fractures,and both minimally invasive techniques are worthy of clinical promotion.However,MIPO has lesser impact on shoulder function.