What is the maximum recommended time for initiating a perimortem C-section after maternal cardiopulmonary arrest?

The maximum recommended time for initiating a perimortem C-section after maternal cardiopulmonary arrest is 5 minutes. This short time frame is critical because the primary goal in this emergency situation is to optimize the chances of survival for both the mother and the fetus. After a maternal cardiac arrest, the fetus may still have a chance of survival if delivered promptly, as they can be in a state of relative deprivation of oxygen, particularly in the third trimester.

At the 5-minute mark, the likelihood of fetal viability decreases significantly due to factors such as hypoxia and acidemia. Research indicates that performing a cesarean section within this window can enhance outcomes, as the removal of the fetus can also relieve pressure on the maternal aorta and improve hemodynamics.

Delaying the procedure beyond this time could lead to detrimental effects on both the mother and fetus, ultimately diminishing the odds of successful resuscitation and recovery. Therefore, acting swiftly within this critical time frame is essential in situations of maternal cardiac arrest.