剪切波弹性成像检测正常成人腕部正中神经的差异性研究

Study on the difference of shear wave elastography in detecting median nerve in healthy individuals

目的探讨正常成人腕部正中神经不同区域所测剪切波速度间的差异。方法选取我院56例健康志愿者的112条腕管处的正中神经,应用剪切波弹性成像检查较近、远端腕骨处正中神经剪切波速度,比较二者间的差异,并分析其与年龄、性别及体质量指数(BMI)等的相关性。结果受试者正中神经近端腕骨水平剪切波速度为(3.80±0.45)m/s,95%可信区间为3.67~3.93 m/s;远端腕骨水平剪切波速度为(4.63±0.47)m/s,95%可信区间为4.49~4.76 m/s。男性同一水平正中神经剪切速度大于女性,差异有统计学意义(P=0.005)。正中神经近、远端腕骨水平所测剪切波速度与年龄均呈正相关(r=0.301、0.376,P=0.037、0.008),与BMI无相关性。结论正常成人正中神经在腕部不同区域的剪切波速度不同,性别、年龄均会影响剪切波速度测值。

Objective To investigate the difference of shear wave velocity at different positions of the median nerve in healthy individuals.Methods A total of 56 healthy volunteers(112 wrists)were included.The shear wave velocity of median nerve at the proximal and distal carpal bones levels were examined by shear wave elastography.The difference between the shear wave velocity of the two levels were compared.The correlations between shear wave velocity and age,sex and body mass index(BMI)were analyzed.Results The shear wave velocity at the proximal carpal bone level of the median nerve was(3.80±0.45)m/s,95%confidence interval was 3.67~3.93 m/s.The shear wave velocity at the distal carpal bone level was(4.63±0.47)m/s,95%confidence interval was 4.49-4.76 m/s.The shear wave velocity at the same level of the median nerve in males was higher than that in females(P=0.005).The shear wave velocity of the median nerve of the two levels was positively correlated with age(r=0.301,0.376,P=0.037,0.008),and was no correlation with BMI.Conclusion The shear wave velocity of the median nerve in different regions of the wrist is different.Both sex and age can affect the shear wave velocity.