Cardiopulmonary Resuscitation in Obstetric Patient: Special Considerations

The prevalence of cardiac arrest in pregnant women varies from 1/20,000 to 1/50,000 pregnancies and is associated with high fetomaternal mortality. The pregnant mother is more susceptible to cardiac arrest as hypoxia is poorly tolerated. Hemorrhage, eclampsia, sepsis, and embolism are common causes of arrest. Cardiac arrest is preventable if a predisposing clinical problem is detected in time by an early warning score and treated immediately. Resuscitation in obstetric patient is challenging and special as it involves the lives of two patients, the mother and the fetus. Physiological and anatomical changes during pregnancy need special considerations during cardiopulmonary resuscitation. Chest compressions, defibrillation, and drug administration guidelines are similar to those in non-pregnant women. Early endotracheal intubation by an expert is desirable but bag-mask ventilation with oxygen supplementation should be initiated immediately by the first responder to prevent hypoxia. Hyperventilation should be avoided. An intravenous line should be established above the level of the diaphragm. Manual left lateral uterine displacement is necessary to relieve aortocaval compression when uterine height is more than 20 weeks. Perimortem cesarean delivery at the site is a part of resuscitation if spontaneous circulation is not established within 4 min, after detection of the arrest. Echocardiography and ultrasonography can help to find out the etiology of the arrest. Targeted temperature management and extracorporeal cardiopulmonary resuscitation should be considered as needed. The newborn will be taken care of by a neonatologist. Following emergency protocols, early warning scores, training and updating resuscitation guidelines, simulations, collecting a national database of pregnant mothers along with the teamwork of obstetrician, anesthesiologist, neonatologist, and emergency physician can reduce fetomaternal mortality.