Relevant factors influencing the outcome of severe cubital tunnel syndrome after operation

Objective To analyze the relationship between age, course of disease, motor nerve conduction velocity of elbow ulnar nerve and prognosis of severe cubital tunnel syndrome after ulnar nerve anterior transposition. Methods Ninety patients with severe cubital tunnel syndrome treated surgically in our hospital from June 2014 to June 2017 were retrospectively analyzed. The course of disease, age, motor nerve conduction velocity of ulnar nerve in elbow segment before and during operation were recorded, and the improvement rate of nerve conduction velocity was calculated.The correlation between each factor and prognosis was analyzed. Results The follow-up time ranged from 12 to 38 months with an average of 22.2 months. According to Gu Yudong's cubital tunnel syndrome functional evaluation criteria, the results were rated as excellent in 32 cases, good in 49 cases, fair in 8 cases and poor in 1 case. The overall excellent and good rate was 90%.The course of disease, age, preoperative and intraoperative motor nerve conduction velocity of ulnar nerve in elbow segment were correlated with curative effect, but the improvement rate of nerve conduction velocity was not correlated with prognosis. Conclusion Preoperative course and age were negatively correlated with prognosis. Preoperative or post-operative motor nerve conduction velocity was positively correlated with prognosis. However, the improvement rate of motor nerve conduction velocity was not correlated with postoperative efficacy and could not be used as a predictor of clinical prognosis. Key words: Cubital tunnel syndrome; Prognosis; Nerve electrophysiology; Motor nerve conduction velocity