[Peculiarities of the emergency care in pregnant women].

Awareness of the physiological changes associated with pregnancy is essential for the management of patients during pregnancy. Cardiovascular status is characterised by hypervolemia and cardiac hyper-output with low resistance. Increased oxygen consumption and respiratory work result in an increased risk of hypoxia. Fetal well-being must also be taken into account. During cardiorespiratory arrest, aortocaval compression by the pregnant uterus may impair the efficacy of CPR and uterine displacement is a routine measure starting from 20 weeks after the LMP. The same factors are involved in hemorrhagic shock, justifying uterine displacement and the ensuring of optimal oxygen transport and utilisation.