Abstract: One of double-chorionic double-amniotic sac twin pregnancy was underwent diaphragmatic hernia repair and pulmonary cystadenoma resection during cesarean section in the condition of complete placental circulation. The nursing key points were summarized as follow：preoperative multidisciplinary joint simulation exercises,placental circulation maintaining under precise uterine cavity pressure control using a self-made intrauterine perfusion system,newborn resuscitation with visualized technology assistance,operational safety assurance with personalized maternal-fetal monitoring and refined management. The operational time was 78 minutes. Newborn with congenital diaphragmatic hernia was born with Apgar score of 3-4-8 at 1-5-10 minute. The newborn with diaphragmatic hernia was discharged after 13 days of treatment and nursing in NICU. The healthy newborn's Apgar score was 2-5-8 at 1-5-10 minute after birth. The healthy newborn was discharged after 6 days of general care. The parturient was discharged 6 days after the cesarean section. After 4 months of follow-up,the parturient and newborn babies were all in good condition and had no complications.

Key words: Operation On Placental Support, Cesarean Section, Pregnancy, Twin, Hernias, Diaphragmatic, Congenital, Intraoperative Care