Cardiopulmonary bypass of acute type A aortic dissection during pregnancy at the 20th gestational week with maternal and foetal survival: A case report.

Background: Type A acute aortic dissection, an aggressive and highly fatal disease, is particularly common among pregnant women and foetuses. This disease often occurs during the third trimester of pregnancy and the postpartum period.

Case report: This case involves a female who was 20 weeks pregnant with type A acute aortic dissection. While maintaining pregnancy, the patient underwent Bentall surgery and Sun's procedure. The duration of circulatory arrest was a brief 4 min. The patient fully recovered 40 days after surgery and remained pregnant post-discharge. At the 38th gestational week, she delivered a healthy male infant via caesarean section.

Clinical discussion: Gestational morbidity can have a serious impact on the safety of mothers and children. Currently, the shortest time reported for hypothermic circulatory arrest is 5 min. In this case, the lower body circulatory arrest was controlled to approximately 4 min during cardiopulmonary bypass while simultaneously safeguarding both individuals. Ideal strategies for cardiopulmonary bypass to reduce foetal risk include shorter cardiopulmonary bypass times, higher flow rates, and higher perfusion pressures. A reduction in the duration of hypothermic circulatory arrest further increases foetal survival rates.

Conclusions: The development of a rational cardiopulmonary bypass plan should be tailored to the physiological characteristics of the pregnant woman to ensure the safety of both the pregnant woman and the foetus, reduce complications, and improve the success rate of the operation.