高频超声检测中国贵阳地区汉族人群正中神经的正常值

通过高频超声对245例贵阳地区汉族正常志愿者上肢正中神经腕横纹、腕管入口、腕管出口、腕横纹上6cm、正中神经穿出旋前圆肌处、肱骨内髁上4cm、肱骨中点的横截面积值的分析，发现受试者左右两侧正中神经横截面积值接近，但男性在腕横纹上6cm，肱骨内髁上4cm，肱骨中点处的正中神经面积大于女性，中老年腕横纹、腕管入口和腕管出口处的正中神经横截面积大于青年，且与体质量及身高有关，说明检测上肢正中神经横截面积有助于区别于异常状态。

Ultrasonographic measurement of median nerve cross-sectional area reference values in a healthy Han population from Guiyang, China

High-resolution ultrasonography was used to analyze the nerve cross-sectional area (CSA) of the median nerve at 7 sites: the wrist crease, pisiform bone, hamate bone, 6 cm proximal to the tip of the wrist crease, proximal forearm (where the nerve enters the pronator teres muscle), 4 cm proximal to the tip of the medial epicondyle, and mid-humerus (mid-point between elbow crease and axilla) in 200 healthy volunteers from Guiyang, China. Results showed similar CSA values between the left and right sides, but the CSA 6 cm proximal to the tip of the wrist crease, proximal forearm, 4 cm proximal to tip of the medial epicondyle, and mid-humerus in males was greater than that of females. Moreover, CSA values at the wrist crease, pisiform bone, and hamate bone were greater in the middle-aged and old groups when compared to the young group, and correlated with body mass and height. Thus, reference values of median nerve CSA of the upper limbs can facilitate the analysis of abnormal nerve conditions.