Babaei-Ghazani Arash, Roomizadeh Peyman, Sanaei Golshan, Najarzadeh-Mehdikhani Saeideh, Habibi Kimia, Nikmanzar Shahin, Kheyrollah Yadollah
Department of Physical Medicine and Rehabilitation, Neuromusculoskeletal Research Center, Firozgar Hospital, Iran University of Medical Sciences, Valieasr Square, Tehran, Iran.
Department of Neurosurgery, Iran University of Medical Sciences, Tehran, Iran.
J Ultrasound. 2018 Sep;21(3):225-231. doi: 10.1007/s40477-018-0303-8. Epub 2018 Jun 16.
The deep branch of the radial nerve (DBRN) enters the forearm as it passes under the arcade of Frohse. This is the most common entrapment site of the DBRN in the forearm. In this study, we investigated the ultrasonographic reference values for the diameters and cross-sectional area (CSA) of the DBRN at the level of the arcade of Frohse in a healthy sample of the population.
Sixty-five healthy Caucasian volunteers (130 nerves) were recruited for this study. The reference range [mean ± 2 standard deviations (SD); 2.5th-97.5th quintiles] and the upper limit of the side-to-side difference were determined. The effects of age, gender, handedness, height, and body mass index were examined.
The mean age was 41.8 ± 11.2 years (range 18-75 years). The mean ± 2SD of the CSA was 0.50-1.42 mm. The upper limit of the normal side-to-side difference was 0.35 mm. The differences between males and females and between the dominant and non-dominant arms were not significant. The mean anteroposterior and transverse diameters were 0.83 ± 0.13 and 1.23 ± 0.29 mm, respectively. A significant correlation between the dominant-side CSA and age (r = 0.41; p < 0.001) was observed. The correlations between CSA and height (r = 0.19; p = 0.12) and body mass index (r = 0.22; p = 0.07) were not significant.
The measurements obtained in this study are valuable for examining DBRN pathologies using high-frequency ultrasound. The findings showed that age was associated with the DBRN CSA, while gender, height, and body mass index were not.
桡神经深支（DBRN）在穿过弗罗瑟弓下方时进入前臂。这是DBRN在前臂最常见的卡压部位。在本研究中，我们调查了健康人群样本中弗罗瑟弓水平处DBRN直径和横截面积（CSA）的超声参考值。
招募65名健康的白种人志愿者（130条神经）参与本研究。确定参考范围[平均值±2标准差（SD）；第2.5至97.5百分位数]以及双侧差异的上限。研究了年龄、性别、利手、身高和体重指数的影响。
平均年龄为41.8±11.2岁（范围18 - 75岁）。CSA的平均值±2SD为0.50 - 1.42mm。正常双侧差异的上限为0.35mm。男性与女性之间以及优势臂与非优势臂之间的差异不显著。前后径和横径的平均值分别为0.83±0.13和1.23±0.29mm。观察到优势侧CSA与年龄之间存在显著相关性（r = 0.41；p < 0.001）。CSA与身高（r = 0.19；p = 0.12）和体重指数（r = 0.22；p = 0.07）之间的相关性不显著。
本研究获得的测量结果对于使用高频超声检查DBRN病变具有重要价值｡研究结果表明，年龄与DBRN的CSA相关，而性别、身高和体重指数则与之无关｡
