How long do you have to perform a peri mortem cesarean section?

The optimal time to perform a peri mortem cesarean section is approximately 5 minutes following maternal cardiac arrest. This time frame is crucial because it significantly increases the chances of successful resuscitation and survival for the fetus. After the onset of maternal cardiac arrest, the fetus is still receiving circulation for a limited time. Performing the cesarean section within this window helps relieve compression of the umbilical cord, which may be compromised by the mother's lack of circulation, thus improving fetal outcomes.

In practice, any significant delay beyond this critical period can lead to a dramatic decrease in fetal viability and increases the risks and complications associated with both the procedure and the mother's condition. Therefore, the 5-minute mark is considered the essential threshold for intervention in such life-threatening scenarios.