Lee SangHun, Kim DongHyun, Cho Hee-Mun, Nam Ho-Sung, Park Dong-Sik
Department of Rehabilitation Medicine, Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
Ann Rehabil Med. 2016 Feb;40(1):50-5. doi: 10.5535/arm.2016.40.1.50. Epub 2016 Feb 26.
To examine the usefulness of the second lumbrical-interosseous (2L-INT) distal motor latency (DML) comparison test in localizing median neuropathy to the wrist in patients with absent median sensory and motor response in routine nerve conduction studies.
Electrodiagnostic results from 1,705 hands of patients with carpal tunnel syndrome (CTS) symptoms were reviewed retrospectively. All subjects were evaluated using routine nerve conduction studies: median sensory conduction recorded from digits 1 to 4, motor conduction from the abductor pollicis brevis muscle, and the 2L-INT DML comparison test.
Four hundred and one hands from a total of 1,705 were classified as having severe CTS. Among the severe CTS group, 56 hands (14.0%) showed absent median sensory and motor response in a routine nerve conduction study, and, of those hands, 42 (75.0%) showed an abnormal 2L-INT response.
The 2L-INT DML comparison test proved to be a valuable electrodiagnostic technique in localizing median mononeuropathy at the wrist, even in the most severe CTS patients.
在常规神经传导研究中正中感觉和运动反应缺失的患者中，检验第二蚓状肌-骨间肌（2L-INT）远端运动潜伏期（DML）比较试验在将正中神经病变定位至腕部的有效性。
回顾性分析1705例有腕管综合征（CTS）症状患者手部的电诊断结果。所有受试者均接受常规神经传导研究评估：记录示指至环指的正中感觉传导、拇短展肌的运动传导以及2L-INT DML比较试验。
1705例患者中共有401只手被归类为重度CTS。在重度CTS组中，56只手（14.0%）在常规神经传导研究中表现为正中感觉和运动反应缺失，其中42只手（75.0%）表现为2L-INT反应异常。
即使在最严重的CTS患者中，2L-INT DML比较试验也被证明是一种在定位腕部正中单神经病变方面有价值的电诊断技术。
