When cardiac arrest during pregnancy occurs, CPR for pregnant women requires quick action that can save both lives. Learning how to perform CPR on a pregnant woman requires understanding the unique physiological changes of pregnancy that affect standard cardiopulmonary resuscitation techniques. Unlike standard CPR for adults, performing CPR on pregnant women demands specific modifications to protect both the mother and her unborn child.
Out-of-hospital cardiac arrest in pregnancy requires immediate intervention, and bystanders trained in first aid and CPR can make the difference between life and death. Understanding when and how to modify CPR techniques based on the stage of pregnancy is essential knowledge for anyone who might encounter a pregnant woman in cardiac arrest.
CPR Modifications for Pregnant Women
Manual left uterine displacement is the primary and most critical modification when performing CPR for pregnant women. From approximately 20 weeks pregnant onwards, when a woman is noticeably pregnant, the uterus can significantly compress the inferior vena cava and aorta when she lies flat on her back. This compression reduces blood return to the heart and can make chest compressions less effective.
To perform this modification, place one hand on the right side of the uterus and gently but firmly push it towards the woman’s left side. This technique, known as left lateral tilt, moves the uterus off the major blood vessels and improves blood flow during compressions. The person performing manual left uterine displacement should maintain this position throughout the entire CPR sequence to ensure continuous relief of vessel compression.
All other CPR techniques remain identical to standard protocols. Hand placement, compression depth of at least 5 cm, compression rate of 100 to 120 compressions per minute, airway management, and the cycle of 30 compressions followed by 2 rescue breaths all follow standard CPR guidelines taught in basic first aid courses.
Emergency Scenarios Requiring Immediate Action
Several specific scenarios can lead to cardiac arrest in pregnancy, each requiring immediate recognition and response. Understanding these situations helps first aid responders recognise when to start CPR for pregnant women and apply pregnancy-specific modifications.
Pregnancy complications such as severe pre-eclampsia, eclampsia, or massive haemorrhage can rapidly progress to cardiac arrest. These conditions can cause profound changes in blood pressure and circulation, leading to cardiovascular collapse. When a pregnant woman becomes unresponsive during pregnancy complications, CPR should be initiated immediately while maintaining left uterine displacement.
Severe allergic reactions or anaphylaxis can occur during pregnancy, often triggered by medications, foods, or environmental factors. Anaphylactic shock can quickly progress to cardiac arrest in pregnancy. If a pregnant person shows signs of severe allergic reaction and becomes unresponsive, perform CPR while someone else administers emergency medications if available.
Drug overdose or poisoning events require immediate CPR when cardiac arrest occurs. During pregnancy, even small amounts of certain substances can have devastating effects on both maternal and foetal circulation. Standard resuscitation principles apply, with the addition of left uterine displacement for visibly pregnant patients.
Trauma-related cardiac arrest from motor vehicle accidents, falls, or other injuries requires careful assessment and modified CPR techniques. Trauma can cause direct cardiac injury, massive blood loss, or compromised breathing that leads to cardiac arrest. When performing CPR after trauma, be especially careful to maintain spinal alignment while still achieving adequate left lateral tilt.
Step by Step guide on CPR for Pregnant women
Here is a step-by-step guide on how to perform CPR for pregnant women, highlighting the key modifications required for pregnancy:
1. Assess the Situation and Call for Help
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for yourself and the casualty (Danger).
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: Gently tap her shoulder and ask if she is okay.
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: If unresponsive and not breathing normally, call emergency services (000 in Australia) or instruct someone else to call immediately.
2. Position the Pregnant Woman Safely
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on a firm surface.
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: Place a rolled towel, pillow, or similar object under her right hip to tilt her body about 15–30 degrees to the left, keeping her shoulders flat on the ground. This reduces pressure on the vena cava and improves blood flow to the heart.
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Ensure she is not lying flat, as this can compress major blood vessels and reduce blood flow to both mother and baby.
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: Place one hand on her forehead and the other under her chin, gently tilting her head back to open the airway. Take care not to overextend the neck.
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Look, listen, and feel for normal breathing for up to 10 seconds. If she is not breathing or only gasping, start CPR immediately.
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: Place the heel of one hand on the centre of her chest (lower half of the sternum), with the other hand on top. Some sources suggest placing hands slightly higher due to the enlarged abdomen, but most recommend the standard position.
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: Push down by one-third of the chest depth (at least 5 cm, but not more than 6 cm or about 2–2.4 inches).
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: Perform 100–120 compressions per minute.
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Allow the chest to fully recoil between compressions.
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After every 30 compressions, give 2 rescue breaths:
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Pinch her nose shut, make a seal over her mouth, and blow steadily for about 1 second, watching for chest rise.
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Repeat for a second breath.
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Continue cycles of 30 compressions and 2 breaths.
7. Use an Automated External Defibrillator (AED) if Available
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Attach the AED pads as instructed (standard pad placement is appropriate; one pad on the upper right chest, the other on the lower left side, avoiding the enlarged abdomen).
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Follow the AED prompts. Continue CPR between AED analyses.
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The woman starts breathing normally.
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Professional help arrives and takes over.
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You are physically unable to continue.
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The scene becomes unsafe.
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every 2 minutes if possible to avoid fatigue and maintain effective compressions.
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If the woman starts breathing, place her in the left lateral recovery position (on her left side) to further reduce pressure on major blood vessels
Summary Table: Key Modifications for CPR in Pregnancy
| Step | Standard CPR | CPR for Pregnant Women |
|---|---|---|
| Body Position | Flat on back | Tilt right hip 15–30° (left lateral tilt) |
| Hand Placement | Lower sternum | Centre of chest; some suggest slightly higher |
| Compression Depth | 1/3 chest | Same (at least 5 cm, not more than 6 cm) |
| Compression Rate | 100–120/min | Same |
| AED Use | Standard | Standard, avoid placing pads over enlarged abdomen |
| Recovery Position | Left side | Left lateral (if breathing returns) |
: These steps are based on current Australian and international first aid guidelines. This guide does not replace certified first aid training.
FAQs
When Should I Stop CPR for Pregnant Women?
Continue CPR for pregnant women until emergency medical services arrive and take over, or until the woman shows clear signs of life such as normal breathing, movement, or responsiveness. Do not stop CPR due to fatigue – if possible, rotate with another trained person every 2 minutes to maintain effective compressions. Only stop if the scene becomes unsafe for you or others, or if a medical professional directs you to stop.
Can Anyone Learn CPR?
You don’t need medical training to learn basic CPR techniques. Many organisations offer CPR certification courses that include pregnancy-specific modifications. These courses typically last 2-4 hours and combine hands-on practice with instruction.
What is the Standard Rate for Chest Compressions and Rescue Breaths in CPR?
The standard CPR cycle consists of 30 chest compressions followed by 2 rescue breaths, repeated continuously. Chest compressions should be performed at a rate of 100 to 120 compressions per minute. Each compression should be at least 5 cm deep (but no more than 6 cm) and allow complete chest recoil between compressions. After every 30 compressions, provide 2 rescue breaths, each lasting 1 second and causing visible chest rise.
