title: [Effects of diagnostic ultrasound on villus ultrastructure of early pregnancy].
abstract: OBJECTIVE
  To evaluate the effects of diagnostic ultrasound on villus ultrastructure of early pregnancy.
  
  
  METHODS
  Using the electron microscopy, the effect of B-mode ultrasound and color Doppler flow image on villus of early pregnancy were studied. 46 cases of early pregnancy women were divided into five groups: Groups 1 : control group; Group II and III: 24 +/- 1 hours after exposure to B mode and color Doppler ultrasound for 30 minutes respectively; Group IV and V: 72 +/- 1 hours after exposure to B mode and color Doppler ultrasound for 30 minutes respectively.
  
  
  RESULTS
  Expansion of perinuclear space in cytotrophoblasts and syncytiotrophoblasts, enlargement of rough endoplasmic reticulum, and vacuolization in the cytoplasm were found in Group II and III.
  
  
  CONCLUSIONS
  The present study showed that the main injured sites after exposure to ultrasound were the plasma membrane and suborganelles. These changes disappeared within 3 days.
authors: 181th Hospital of PLA, Guilin.
authors: Y
authors: Y
authors: Gao
authors: Y
authors: Y
authors: Gao
authors: H
authors: H
authors: Yang
mesh_terms: D000328:Adult; D002824:Chorionic Villi / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D018615:Ultrasonography, Doppler, Color / Q000009:adverse effects; D016216:Ultrasonography, Prenatal / Q000009:adverse effects*