青年人面肌厚度正常值的B超测量

Type-B real-time ultrasonography to measure the thickness of the normal facial muscle of young people

目的评价通过B超测量面肌厚度的方法诊断面肌萎缩的可行性,并测量青年人面肌厚度的正常值,分析面肌厚度正常值的相关因素。方法选取34名健康青年志愿者,记录所有志愿者的年龄、性别、身高、体重及头围5种相关因素,用B超按设定方法测量每位志愿者双侧的额肌、降口角肌和降口唇肌,对测量结果及5种相关因素进行统计学分析。并从34名志愿者中随机选取5名,在1周后和2周后分别重复测量3组面肌,比较3次测量结果有无差异。结果 (1)34名志愿者经B超测量3组面肌厚度,双侧额肌、降口角肌和降口唇肌厚度无显著差异(P>0.05)。面肌厚度平均值为:额肌左侧(1.60±0.21)mm,右侧(1.62±0.22)mm;降口角肌左侧(2.60±0.50)mm,右侧(2.62±0.51)mm;降口唇肌左侧(1.51±0.23)mm,右侧(1.52±0.23)mm。(2)随机选取的五5名志愿者重复测量3次,3次面肌厚度测量结果相近,无统计学差异(P>0.05)。(3)按性别分组,女性18例,男性16例,组间比较:男性3组面肌厚度大于女性,差异有统计学意(P<0.05)。(4)体重指数与所测量的3块面肌厚度呈正相关性(P<0.05),额肌、降口角肌、降口唇肌与体重指数的相关系数分别为0.391、0.459及0.447;头围与面肌厚度无明显相关性。(5)选定的年龄段内(20~30岁)3组面肌厚度与年龄无相关性(P>0.05)。证明20~30岁年龄段的青年人,面肌厚度不受年龄影响,该年龄段人群面肌厚度具有相对稳定性。结论 (1)B超测量面肌厚度具有可重复性和很好的稳定性;(2)正常青年人(20~30岁)双侧额肌、降口角肌和降口唇肌厚度无明显差异;(3)不同性别的正常青年人(20~30岁)面肌厚度有明显差异,男性的额肌、降口角肌、降口唇肌均较女性厚;(4)正常青年人(20~30岁)面肌厚度跟体重指数呈正相关,也就是说越是肥胖的人面肌越厚,面肌厚度与头围无相关性。

Objective To establish a method to diagnose facial muscle atrophy. And measure the thickness of the normal facial muscle of young people type-B real-time ultrasonography. Then, analyze factors related to the thickness of facial muscles. Methods A total of 34 healthy volunteers were selected to be measured the thickness of their bilateral muscles ： frontal muscle, depressor angulioris, depressor labii inferioris by type-B real-Time sonography and collect the relevant informations of the volunteers, including their age, sex, height, weight, head circumference. Then analysis the results and five related factors with statistical methods. In addition, We measured the thickness of 5 volunteers, randomly selected from the all 34, one week and two weeks later. Results ①Mean thickness of the frontal muscle, was （1.60±0.21） mm on the left and （1.60±0.21） mm on the right; the depressor angnli otis, was （2.60±0.50） mm on the left and was （2.62 ±0.51 ） mm on the right; the depressor labii inferioris, was （1.51±0.23） mm on the left and was （1.52 ±0.23） mm on the right. There were no significant difference between bilateral face （P〉 0.05） ; ②There was no significant difference between the measurement results for three times of the 5 volunteers （P 〉 0.05） ; ③The volunteers contain 18 females and 16 males. The facial muscles of males were thicker than females; ④Body mass index and the thick- ness of facial muscles was positively correlated （P〈 0.05） . The correlation coefficient was 0.391 of frontal muscle, 0.447 of depressor angnli otis, and 0.459 of depressor labii inferioris; No significant correlation was found between the head cir- cumference and the thickness of facial muscles （P 〉 0.05） ; ⑤The thickness of the facial muscles had no correlation with age （aged 20-30, P〉0.05） , which prove that to young people （aged 20-30） , facial muscles are relatively stable, no correlation with age. Conclusion ①The method of using sonography to measure the thickness of facial muscles, is repeatable and stabile; ②There is no significant difference between bilateral facial muscles; ③The facial muscles of male are thicker than female; ④The thickness of the facial muscles has significant correlation with body mass index, but no correlation with the head circumference and age （20-30） .