What is amniotic fluid embolism?

Amniotic fluid embolism is a rare and highly fatal obstetric emergency. Amniotic fluid embolism occurs in 7.7 per 100,000 births and the estimated mortality (death) rate is 70-90%. Amniotic fluid embolism can occur during pregnancy, but is more commonly found to occur during labor and shortly after. Rapid delivery and safe medical interventions are important in order to save the mother and baby’s life. Amniotic fluid embolism currently remains an unpredictable and unpreventable fatal complication of pregnancy.

What are the risk factors for amniotic fluid embolism?

The risk factors for amniotic fluid embolism are undiagnosed and are currently being researched. Risk factors may help prevent and possibly provide earlier treatment. Possible risk factors, according to current research, include:

  • Maternal age
  • Multiple gestation (one or more fetuses)
  • Fetal distress
  • Placental abnormalities
  • Eclampsia (seizures or convulsions)
  • Polyhydramnios: This occurs when there is too much amniotic fluid surrounding the baby.
  • Cervical lacerations
  • Uterine rupture
  • Induction medications or procedures
  • Cesarean section
  • Operative assisted deliveries (e.g., forceps or vacuum)
  • Rapid and intense labor

What causes amniotic fluid embolism?

Amniotic fluid embolism is the result of an allergic-like reaction to amniotic fluid entering the mother’s circulatory system. Results of this reaction include:

  • High blood pressure
  • Blood clots in the lungs
  • Failure of the right side of the heart
  • Left ventricular failure
  • Low blood pressure
  • Shock
  • Deprivation of oxygen
  • Blue skin
  • Coma
  • Disseminated intravascular coagulopathy (DIC): This occurs when proteins which control blood clotting become overactive.

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