Babaei-Ghazani Arash, Roomizadeh Peyman, Nouri Esmaeil, Raeisi Golnaz, Yousefi Naseh, Asilian-Mahabadi Mahdieh, Moeini Mohammad
Department of Physical Medicine and Rehabilitation, Neuromusculoskeletal Research Center, Firozgar Hospital, Iran University of Medical Sciences, Valieasr square, Tehran, Iran.
Department of Emergency Medicine, Iran University of Medical Sciences, Tehran, Iran.
Surg Radiol Anat. 2018 Sep;40(9):1019-1024. doi: 10.1007/s00276-018-2016-2. Epub 2018 Apr 27.
The purpose of this study was to investigate the ultrasonographic reference values for diameters and cross-sectional area (CSA) of the median nerve between the two heads of the pronator teres muscle in healthy population as well as to correlate the findings with height, weight, sex and age.
Fifty-five healthy Caucasian volunteers (110 median nerves) were included in this study. The reference range (mean ± 2 standard deviations; 2.5th-97.5th quintiles) and the upper limit of side-to-side difference of the median nerve between the two heads of the pronator teres muscle were investigated using high-frequency ultrasound. The effects of age, sex, height, handedness, and body mass index (BMI) were examined.
The mean age was 39.4 ± 10.6 years (range 18-75 years). The mean ± 2SD of the median CSA was 4.9-12.9 mm. The upper limit of normal side-to-side difference was 3.0 mm. The differences between genders and between the dominant and non-dominant hands were not significant. The mean antero-posterior and transverse diameters were 7.2 ± 1.5 and 10.7 ± 2.4 mm, respectively. Significant correlations were observed between the dominant-side CSA and BMI (r = 0.33; p = 0.01) and age (r = 0.31; p = 0.02). The correlation between the CSA and height (r = 0.19; p = 0.16) was not significant.
The measurements obtained in this study are of importance for examining median nerve entrapments in the forearm using high-frequency ultrasound. Age and BMI showed to be correlated with median nerve CSA; while gender and height were not.
本研究旨在探讨健康人群中旋前圆肌两头之间正中神经直径和横截面积（CSA）的超声参考值，并将研究结果与身高、体重、性别和年龄进行关联分析。
本研究纳入了55名健康的白种人志愿者（110条正中神经）。使用高频超声研究旋前圆肌两头之间正中神经的参考范围（平均值±2个标准差；第2.5至97.5百分位数）以及两侧差异的上限。研究了年龄、性别、身高、利手和体重指数（BMI）的影响。
平均年龄为39.4±10.6岁（范围18 - 75岁）。正中神经CSA的平均值±2SD为4.9 - 12.9mm。正常两侧差异的上限为3.0mm。性别之间以及优势手和非优势手之间的差异不显著。前后径和横径的平均值分别为7.2±1.5和10.7±2.4mm。优势侧CSA与BMI（r = 0.33；p = 0.01）和年龄（r = 0.31；p = 0.02）之间存在显著相关性。CSA与身高之间的相关性（r = 0.19；p = 0.16）不显著。
本研究获得的测量结果对于使用高频超声检查前臂正中神经卡压具有重要意义。年龄和BMI与正中神经CSA相关；而性别和身高则无关。
