Clinical Unit of Neurology, Department of Medicine, Surgery and Health Sciences, Cattinara University Hospital ASUGI, University of Trieste, Strada di Fiume, 447 - 34149 Trieste, Italy.
Clinical Unit of Neurology, Department of Medicine, Surgery and Health Sciences, Cattinara University Hospital ASUGI, University of Trieste, Strada di Fiume, 447 - 34149 Trieste, Italy.
Clin Neurophysiol. 2020 Jun;131(6):1267-1271. doi: 10.1016/j.clinph.2020.03.013. Epub 2020 Mar 31.
A very high-resolution (70 MHz) ultrasound device (VHRUS) has recently been approved for use in humans. The aim of this study was to use VHRUS to collect data on healthy subjects to propose some reference values for the digital branches of the median nerves of the hand.
A VHRUS with 70 MHz linear array transducer was used to measure the cross sectional area of the median nerve at the wrist (CSA) and digital branches (CSA), largest and smallest fascicles, the fascicles number (N), the fascicle density (FD), the flattening ratio (FR) and CSA/CSA.
Data from 20 healthy subjects were obtained for both hands. The median nerve at the wrist and digital branches were properly identified without anatomical alterations. No differences were found between the right and the left hand. In the dominant hand, CSA was 9.35 mm (4.57-12.35) and N was 24 (18-38). FD and FR were respectively 2.94 (2.47-4.91) and 2.74 (1.70-4.90).
VHRUS technology can visualize the median nerves at the wrist, their internal structure and their small branches at the fingers, providing both a qualitative and quantitative assessment. Results from this study provide preliminary reference values in a young healthy sample.
Most conventional ultrasound devices are not able to properly visualize the distal branches of the median nerve. In contrast, VHRUS allows to detect and measure smaller structures of the nerve, assisting in clinical practice.
一种超高分辨率（70MHz）超声设备（VHRUS）最近已获准在人体上使用。本研究旨在使用 VHRUS 收集健康受试者的数据，为手部正中神经的数字分支提出一些参考值。
使用 70MHz 线性阵列换能器的 VHRUS 测量手腕处正中神经的横截面积（CSA）和数字分支（CSA）、最大和最小束、束数（N）、束密度（FD）、扁平比（FR）和 CSA/CSA。
获得了 20 名健康受试者双手的数据。正中神经在手腕和手指的分支都可以被正确识别，没有解剖学改变。右手和左手之间没有差异。在优势手中，CSA 为 9.35mm（4.57-12.35），N 为 24（18-38）。FD 和 FR 分别为 2.94（2.47-4.91）和 2.74（1.70-4.90）。
VHRUS 技术可以可视化手腕处的正中神经、其内部结构及其手指上的小分支，提供定性和定量评估。本研究的结果为年轻健康样本提供了初步的参考值。
大多数常规超声设备无法正确可视化正中神经的远端分支。相比之下，VHRUS 可以检测和测量神经的较小结构，有助于临床实践。
