A comparative study of motor nerve conduction velocity of ulnar nerve between elbow extension and elbow flexion in patients with cubital tunnel syndrome

中华手外科杂志 Pub Date : 2019-10-10 DOI:10.3760/CMA.J.ISSN.1005-054X.2019.05.020

Jiangming Qi, K. Gong, Dongsheng Li, Dawei Zhang

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Abstract

Objective To compare the motor nerve conduction velocity (MNCV) of ulnar nerve between elbow joint natural extension and extreme flexion for 2 minutes in patients with cubital tunnel syndrome, and to explore the relationship between MNCV of ulnar nerve and elbow joint flexion and extension in patients with cubital tunnel syndrome. Methods Under two different conditions of elbow joint natural extension and extreme flexion for 2 minutes, 45 patients with cubital tunnel syndrome were examined by two methods: recording electrodes in the abductor digitorum minimi and the first dorsal interosseous muscle, and measuring the MNCV of ulnar nerve in the elbow tunnel segment. The MNCV of ulnar nerve was V1 at elbow extension and V2 at elbow flexion for 2 minutes when recording electrodes were in the abductor digitorum minimi; the MNCV of ulnar nerve was V3 at elbow extension and V4 at elbow flexion for 2 minutes when recording electrodes were in the first dorsal interosseous muscle. Matched-pair t-tests were performed for V1 and V2, V3 and V4, V1 and V3, V2 and V4, respectively. Results The MNCV of ulnar nerve in the elbow tunnel segment in the 45 patients were V1(29.47±8.37) m/s、V2(28.32±7.85) m/s、V3(27.91±9.62) m/s、V4(26.76±8.58) m/s, respectively. There was no significant difference in paired t test between V1 and V2, V3 and V4, V1 and V3, V2 and V4 (P>0.05). Conclusion There was no significant difference in MNCV of ulnar nerve in elbow segment between elbow joint extension and flexion in patients with cubital tunnel syndrome. There was no significant difference in the results of electromyogram between abductor digitorum minimi and first dorsal interosseous muscle. The results showed that elbow flexion or elbow extension had no significant effect on the results of electromyography in patients with cubital tunnel syndrome. Key words: Cubital tunnel syndrome; Ulnar nerve; Motor nerve conduction velocity; Elbow flexion test

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肘管综合征患者尺神经运动神经传导速度与肘伸屈的比较研究

目的比较肘管综合征患者肘关节自然伸展和极度屈曲2分钟时尺神经运动神经传导速度(MNCV)，探讨肘管综合征患者尺神经运动神经传导速度与肘关节屈伸的关系。方法对45例肘管综合征患者在肘关节自然伸展和极端屈曲2分钟的两种不同条件下，采用指外展肌和第一背骨间肌记录电极，测量肘管段尺神经的mcv。记录电极位于指外展肌时，尺神经的mcv在肘伸时为V1，在肘屈时为V2，持续2分钟;记录电极位于第一背骨间肌2分钟时，尺神经的mcv在肘伸时为V3，肘屈时为V4。分别对V1与V2、V3与V4、V1与V3、V2与V4进行配对t检验。结果45例患者肘管段尺神经mcv分别为V1(29.47±8.37)m/s、V2(28.32±7.85)m/s、V3(27.91±9.62)m/s、V4(26.76±8.58)m/s。配对t检验中，V1与V2、V3与V4、V1与V3、V2与V4比较，差异无统计学意义(P < 0.05)。结论肘管综合征患者肘关节伸、屈两组尺神经mcv无显著性差异。指外展肌与第一背骨间肌的肌电图差异无统计学意义。结果表明，肘屈或肘伸对肘管综合征患者的肌电结果无显著影响。关键词:肘管综合征;尺骨神经;运动神经传导速度;弯头弯曲试验

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中华手外科杂志

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