| Objective:To search Median nerve of upper limb by high frequency ultrasound and master the whole upper extremity of median nerve of the median nerve cross-sectional area,easy identification of the anatomical sites selected ultrasound measurement of the median nerve(cross-sectional area,CSA)and to explore its relationship with the surrounding tissue,to provide normal reference range and clinical diagnosis of peripheral nerve diseases and provide the basis.Methods:In 240 healthy volunteers along the median nerve shape by using high-frequency ultrasound,were measured at 5 sites(at the carpal tunnel rasceta),forearm midpoint,median nerve passes through the pronator teres,humeral supracondylar humerus and at the midpoint of the CSA,each site measurements were repeated 3 times and take the average value,and to analyze the correlation between CSA and height and weight.Results:High frequency ultrasound showed normal median nerve cross section is a screen like low echo images,presented in different parts were round,oval or triangular,longitudinal section into bunches of low echo is intermittent banded echo segmentation.Median nerve at these five loci were(10.67±0.94)mm~2,(10.25±0.61)mm~2,(9.83±0.50)mm~2,(11.44±0.43)mm~2,and(11.24±0.56)mm~2.3.Upper limbs compared with the median nerve at the site of a CSA difference in median nerve median nerve passes through the pronator teres muscle,there was statistical significance between humeral supracondylar humerus and the midpoint between men and women.Conclusions:The median nerve in the high-frequency ultrasound probe and the whole process,the display rate is 100%;there are differences in different parts of the normal value and ultrasonic slightly,the difference was statistically significant;the median nerve in the upper arm of the CSA section of the thick,carpal tunnel at the forearm of the finest. |
