Aird Jeff, Cady Ryan, Nagi Haseeb, Kullar Shaveen, MacDermid Joy C
University of Western Ontario, London, ON, Canada.
J Hand Ther. 2006 Jul-Sep;19(3):299-305; quiz 306. doi: 10.1197/j.jht.2006.04.004.
To determine whether current perception threshold (CPT) varied between subjects with and without carpal tunnel syndrome (CTS) and whether positioning in wrist extension (reversed Phalen's test) was provocative.
Subjects (n=30) were tested using the Neurometer (Neutron, Inc., Baltimore, MD) at 5, 250, and 2,000 Hz in a rest and reverse Phalen's position. Group and positional differences were analyzed using analysis of variance.
Higher CPT occurred at 2,000 Hz in both rest (p=0.02) and reverse Phalen's position (p=0.01) in CTS subjects. There was also a significant change in CPT in the CTS group following wrist extension, particularly at 2,000 Hz (p<0.05).
A positional effect on sensibility was noted at 2,000 Hz in subjects with CTS. Further evaluation is required to determine the role and optimal test protocols for provocative-sensory testing in diagnosis and outcome assessment of CTS. For CPT these should focus on using the 2,000 Hz frequency.
确定患有和未患有腕管综合征（CTS）的受试者之间的电流感觉阈值（CPT）是否存在差异，以及手腕伸展位（反向Phalen试验）是否具有激发性。
使用神经测量仪（Neutron公司，马里兰州巴尔的摩）对30名受试者在休息位和反向Phalen位进行5、250和2000赫兹频率的测试。采用方差分析对组间和位置差异进行分析。
CTS受试者在休息位（p = 0.02）和反向Phalen位（p = 0.01）时，2000赫兹频率下的CPT均更高。CTS组在手腕伸展后CPT也有显著变化，尤其是在2000赫兹频率时（p < 0.05）。
在2000赫兹频率时，观察到CTS受试者的感觉存在位置效应。需要进一步评估以确定激发性感觉测试在CTS诊断和结果评估中的作用及最佳测试方案。对于CPT，应重点关注使用2000赫兹频率。
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