诊断级超声波辐照对人早孕绒毛组织的影响

目的:研究早孕时经超声辐照后绒毛组织的超微结构变化和细胞化学反应变化.方法:15例妊娠6～8周健康妇女分为4组,A组(对照组)3例,未行超声辐照;B组4例,超声辐照10 min;C组、D组各4例,辐照20 min.B、C组超声辐照后即时取材,D组超声辐照后3 d取材.观察绒毛组织超微结构和细胞化学反应的变化.结果:C组,即超声辐照20 min后即时取材组,与正常组相比较绒毛组织有变化,合体滋养细胞线粒体嵴间隙及内质网扩张,过氧化氢细胞化学反应为阳性,合体滋养细胞微绒毛上有致密物沉积.A组、B组、D组均无明显异常.结论:常规的诊断级超声辐照剂量对早期胚胎组织无明显危害.

Effects of diagnostic ultrasound on human villi: ultrastructure and hydrogen peroxide cytochemistry observation

Objective:To study the instant and short term effects of diagnostic ultrasound on ultrastructure and hydrogen peroxide cytochemistry of human villi. Methods: Fifteen healthy women with gestational ages of 6 to 8 weeks were divided into 4 groups. Group A( n =3),B( n =4),C( n =4) and D( n =4) were exposured to diagnostic ultrasound for 0,10,20 and 20 min respectively. In group A, B, and C, the villi were taken out immediately after ultrasound exposure and were studied. In group D, the villi were taken out 3 d after ultrasound exposure. Results: The results showed that there were changes only in group C. Enlargement of endoplasmic reticulum and mitochondrial intracristal space were observed in syntrophoblast cells. In group A, B, and D, there were no evident abnormality. Conclusion: The conventional acoustic exposure of diagnostic ultrasound is safe for human villi.