Background： The appropriate elbow position of short-segment nerve conduction study （SSNCS） to diagnose cubital tunnel syndrome （CubTS） is still controversial. The goal of this study was to determine the effect of...Background： The appropriate elbow position of short-segment nerve conduction study （SSNCS） to diagnose cubital tunnel syndrome （CubTS） is still controversial. The goal of this study was to determine the effect of different elbow positions at full extension and 70° flexion on SSNCS in CubTS. Methods： In this cross-sectional study, the clinical data of seventy elbows from 59 CubTS patients between September, 2011 and December, 2014 in the Peking University First Hospital were included as CubTS group. Moreover, thirty healthy volunteers were included as the healthy group. SSNCS were conducted in all subjects at elbow fhll extension and 70° elbow flexion. Paired nonparametric test, bivariate correlation, Bland-Altman, and Chi-squared test analysis were used to compare the effectiveness of elbow full extension and 70° flexion elbow positions on SSNCS in CubTS patients. Results： Data of upper limit was calculated from healthy group, and abnormal latency was judged accordingly. CubTS group＇s latency and compound muscle action potential （CMAP） of each segment at 70° elbow flexion by SSNCS was compared with lull extension position, no statistically significant difference were found （all P 〉 0.05）. Latency and CMAP of each segment at elbow full extension and 70° flexion were correlated （all P 〈 0 elbow （P - 0.43）, and the latency （P = 0.15） and the CMAP （P = 01）, except the latency of segment of 4 cm to 6 cm above 0.06） of segment of 2 cm to 4 cm below elbow. Bivariate correlation and Bland-Altman analysis proved the correlation between elbow full extension and 70° flexion. Especially in segments across the elbow （2 cm above the elbow and 2 cm below it）, latency at elbow full extension and 70° flexion were strong direct associated（r=0.83, P〈0.01;r=0.55, P〈0.01）,andsodidtheCMAP（r 0.49, P〈0.01;r=0.72, P〈0.01）.Therewasno statistically significant difference in abnormality of each segment at full extension as measured by SSNCS compared with that at 70° flexion （P 〉 0.05, respectively）. Conclusions： There was no statistically significant difference in the diagnosis of CubTS with the elbow at full extension compared with that at 70° flexion during SSNCS. We suggest that elbow positon at full extension can also be used during SSNCS.展开更多
Background：To study lesions＇ location and prognosis of cubital tunnel syndrome （CubTS） by routine motor nerve conduction studies （MNCSs） and short-segment nerve conduction studies （SSNCSs,inching test）.Methods...Background：To study lesions＇ location and prognosis of cubital tunnel syndrome （CubTS） by routine motor nerve conduction studies （MNCSs） and short-segment nerve conduction studies （SSNCSs,inching test）.Methods：Thirty healthy subjects were included and 60 ulnar nerves were studied by inching studies for normal values.Sixty-six patients who diagnosed CubTS clinically were performed bilaterally by routine MNCSs and SSNCSs.Follow-up for 1-year,the information of brief complaints,clinical symptoms,and physical examination were collected.Results：Sixty-six patients were included,88 of nerves was abnormal by MNCS,while 105 was abnormal by the inching studies.Medial epicondyle to 2 cm above medial epicondyle is the most common segment to be detected abnormally （59.09％）,P ＜ 0.01.Twenty-two patients were followed-up,17 patients＇ symptoms were improved.Most of the patients were treated with drugs and modification of bad habits.Conclusions：（1） SSNCSs can detect lesions of compressive neuropathy in CubTS more precisely than the routine motor conduction studies.（2） SSNCSs can diagnose CubTS more sensitively than routine motor conduction studies.（3） In this study,we found that medial epicondyle to 2 cm above the medial epicondyle is the most vulnerable place that the ulnar nerve compressed.（4） The patients had a better prognosis who were abnormal in motor nerve conduction time only,but not amplitude in compressed lesions than those who were abnormal both in velocity and amplitude.Our study suggests that SSNCSs is a practical method in detecting ulnar nerve compressed neuropathy,and sensitive in diagnosing CubTS.The compound muscle action potentials by SSNCSs may predict prognosis of CubTS.展开更多
文摘Background： The appropriate elbow position of short-segment nerve conduction study （SSNCS） to diagnose cubital tunnel syndrome （CubTS） is still controversial. The goal of this study was to determine the effect of different elbow positions at full extension and 70° flexion on SSNCS in CubTS. Methods： In this cross-sectional study, the clinical data of seventy elbows from 59 CubTS patients between September, 2011 and December, 2014 in the Peking University First Hospital were included as CubTS group. Moreover, thirty healthy volunteers were included as the healthy group. SSNCS were conducted in all subjects at elbow fhll extension and 70° elbow flexion. Paired nonparametric test, bivariate correlation, Bland-Altman, and Chi-squared test analysis were used to compare the effectiveness of elbow full extension and 70° flexion elbow positions on SSNCS in CubTS patients. Results： Data of upper limit was calculated from healthy group, and abnormal latency was judged accordingly. CubTS group＇s latency and compound muscle action potential （CMAP） of each segment at 70° elbow flexion by SSNCS was compared with lull extension position, no statistically significant difference were found （all P 〉 0.05）. Latency and CMAP of each segment at elbow full extension and 70° flexion were correlated （all P 〈 0 elbow （P - 0.43）, and the latency （P = 0.15） and the CMAP （P = 01）, except the latency of segment of 4 cm to 6 cm above 0.06） of segment of 2 cm to 4 cm below elbow. Bivariate correlation and Bland-Altman analysis proved the correlation between elbow full extension and 70° flexion. Especially in segments across the elbow （2 cm above the elbow and 2 cm below it）, latency at elbow full extension and 70° flexion were strong direct associated（r=0.83, P〈0.01;r=0.55, P〈0.01）,andsodidtheCMAP（r 0.49, P〈0.01;r=0.72, P〈0.01）.Therewasno statistically significant difference in abnormality of each segment at full extension as measured by SSNCS compared with that at 70° flexion （P 〉 0.05, respectively）. Conclusions： There was no statistically significant difference in the diagnosis of CubTS with the elbow at full extension compared with that at 70° flexion during SSNCS. We suggest that elbow positon at full extension can also be used during SSNCS.
文摘Background：To study lesions＇ location and prognosis of cubital tunnel syndrome （CubTS） by routine motor nerve conduction studies （MNCSs） and short-segment nerve conduction studies （SSNCSs,inching test）.Methods：Thirty healthy subjects were included and 60 ulnar nerves were studied by inching studies for normal values.Sixty-six patients who diagnosed CubTS clinically were performed bilaterally by routine MNCSs and SSNCSs.Follow-up for 1-year,the information of brief complaints,clinical symptoms,and physical examination were collected.Results：Sixty-six patients were included,88 of nerves was abnormal by MNCS,while 105 was abnormal by the inching studies.Medial epicondyle to 2 cm above medial epicondyle is the most common segment to be detected abnormally （59.09％）,P ＜ 0.01.Twenty-two patients were followed-up,17 patients＇ symptoms were improved.Most of the patients were treated with drugs and modification of bad habits.Conclusions：（1） SSNCSs can detect lesions of compressive neuropathy in CubTS more precisely than the routine motor conduction studies.（2） SSNCSs can diagnose CubTS more sensitively than routine motor conduction studies.（3） In this study,we found that medial epicondyle to 2 cm above the medial epicondyle is the most vulnerable place that the ulnar nerve compressed.（4） The patients had a better prognosis who were abnormal in motor nerve conduction time only,but not amplitude in compressed lesions than those who were abnormal both in velocity and amplitude.Our study suggests that SSNCSs is a practical method in detecting ulnar nerve compressed neuropathy,and sensitive in diagnosing CubTS.The compound muscle action potentials by SSNCSs may predict prognosis of CubTS.
