15463 Amniotic Fluid Embolism

Overview

Amniotic fluid embolism (AFE) is a rare but very serious emergency that can happen during labour or shortly after childbirth. It occurs when amniotic fluid (the fluid that surrounds the baby in the womb) enters the mother's bloodstream. The body reacts severely to this, causing a sudden drop in blood pressure, breathing problems, and sometimes cardiac arrest. It requires immediate emergency treatment.

No. AFE is very rare. It occurs in about 1 to 2 per 100,000 pregnancies.

AFE affects pregnant women. It can occur in any pregnancy, but certain factors like a multiple pregnancy, older maternal age, or certain placental problems may slightly increase the risk.

Symptoms

Common symptoms

• Sudden severe shortness of breath
• A sudden feeling of extreme anxiety or agitation
• A rapid fall in blood pressure
• Chest pain or pressure
• Fainting or loss of consciousness
• Heavy vaginal bleeding that comes on suddenly

Symptoms in children

• Not applicable — AFE occurs in pregnant women, not children.

Symptoms in older adults

• Not applicable — AFE occurs during pregnancy and childbirth, not in older adults.

Causes

Main causes

• AFE happens when amniotic fluid enters the mother's bloodstream, triggering a serious reaction. The exact reason this happens is still not fully understood.

Risk factors

• Multiple pregnancy (carrying more than one baby)
• Older maternal age (for example, over 35)
• Placental problems such as placenta praevia or placental abruption
• Induced labour or a long labour
• Delivery by caesarean section
• Pre-eclampsia

When to see a doctor

See a doctor urgently if:

• If you are pregnant or recently gave birth and have sudden breathlessness, chest pain, or severe bleeding, call emergency services immediately.

Book a routine appointment if:

• If you have any concerns about your pregnancy or birth plan, talk to your midwife or doctor at your next routine appointment.

Diagnosis

AFE is usually diagnosed based on your symptoms and the timing of the event. There is no single test for AFE. Doctors will work quickly to rule out other causes like blood clots or heart problems.

Tests that may be done

• Blood tests to assess oxygen levels, blood clotting, and organ function.
• An electrocardiogram (ECG) to check your heart rhythm.
• A chest X-ray to examine your lungs.
• An echocardiogram to see how well your heart is pumping.

What to expect at your appointment

If AFE is suspected, you will be moved to critical care where a team of doctors and midwives will monitor your breathing, heart rhythm, blood pressure, and blood clotting very closely.

Treatment

There is no cure for AFE, but treatment is emergency life support. The goal is to keep your heart and lungs working, control bleeding, and maintain your blood pressure until your body recovers.

Self-care at home

• AFE requires in-hospital emergency treatment. Once you are stable, you will need rest and time to recover, both physically and emotionally.

Medical treatments

Treatment may include oxygen or a breathing machine to help you breathe, intravenous fluids and medicines to support your blood pressure, and treatments to help the blood clot. Blood transfusions may be given if you lose a large amount of blood. Doctors may also use medicines to help the uterus contract and reduce bleeding.

When is surgery considered?

If the baby has not yet been born, the healthcare team may need to deliver the baby quickly by an emergency caesarean section to help save both you and your baby. In some cases, surgery may be needed to control severe bleeding.

Living with this condition

Recovery from AFE can take time. You may need to stay in hospital for a while, and follow-up appointments with your obstetrician and other specialists are important.

Lifestyle tips

• Follow your healthcare team's advice about physical activity and returning to your normal routine.
• Give yourself time to heal — rest is important.
• Ask for support from family, friends, or a counsellor if you're feeling anxious or overwhelmed.

Diet and exercise

Eat a balanced diet and drink plenty of fluids to help your body recover. Your doctors will advise you on when it is safe to exercise or return to your usual activities.

Mental health and emotional wellbeing

Going through AFE is a traumatic experience. It is normal to feel anxious, scared, or distressed afterwards. It may help to talk about your experience with a counsellor or psychologist, and to seek support from your healthcare team.

Prevention

AFE cannot be prevented. It is sudden and unpredictable. The best way to stay safe is to have regular antenatal care and to give birth in a hospital where emergency care is available.

Screening programmes

There is no screening test for AFE.

Complications

If left untreated

• Without rapid emergency treatment, AFE can cause cardiac arrest, severe bleeding, and organ damage, which may be life-threatening.

Long-term outlook

AFE is a very serious condition, but with immediate and intensive hospital care, many women do survive. Long-term recovery is different for everyone, and ongoing support can help with both physical and emotional healing.

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