The Application of the Neural-electrophysiological Test Combined with the High-frequency Ultrasound Test on the Ulnar Nerve Entrapment Syndrome

Objective To explore the comprehensive assessment value of using the Neural-electrophysiological test and the high-frequency ultrasound in detecting the patients with ulnar nerve entrapment at the elbow(UNE).Methods 32 patients with ulnar nerve entrapment syndrome(the affected side were listed as the disease limb group and the contralateral side were listed as the healthy limb group) and 16 normal controls had participated in the clinical test,and all of them were tested by the Neural-electrophysiological test and the High-frequency ultrasound.A comparative analysis was conducted among the acquired data of the Neural-electrophysiological tests,and a correlation analysis between the elbow upper-elbow lower's movement conduction velocities(MCV) acquired from the disease limb group and the biggest cross-sectional area(CSA) of ulnar nerve tested by the high-frequency ultrasound was conducted.Results The Neural-electrophysiological tests showed that the disease limb group's MCV of the ulnar nerve with elbow upper-elbow lower reduced with it's average mean 29.31 m·s-1,and the motor evoked volatility decreased too.Compared with the healthy limb group and the control group,the differences were statistically significant(P0.05).The high-frequency ultrasound test showed that,among 32 patients,20 patients suffered with the cubital tunnel placeholders,5 patients with the surrounding tissue adhesion,4 patients with the tissue proliferation and 1 with the partial fracture.The average CSA was 14.6mm2 and it showed an significantly negative correlation compared with the change of the elbow upper-elbow lower's MCV.The correlation coefficient was-0.813.Conclusion The neural-electrophysiological test is an effective measure to diagnose the ulnar nerve entrapment syndrome,and it united with the high-frequency ultrasound test can improve the accuracy of diagnostic localization of the syndrome.