Martimucci Kristina, Kuhn Theresa, Bilinski Robyn, Alvarez-Perez Jesus
Rutgers New Jersey Medical School, Department of Obstetrics, Gynecology and Women's Health, Newark, NJ 07301, USA.
Hackensack University Medical Center, Department of Obstetrics and Gynecology, Hackensack, NJ 07601, USA.
Case Rep Obstet Gynecol. 2018 Mar 22;2018:2521797. doi: 10.1155/2018/2521797. eCollection 2018.
Twin Reverse Arterial Perfusion (TRAP) Sequence is a rare complication of monochorionic pregnancies. Without intervention, the viable pump twin in a case of TRAP Sequence may develop high output cardiac failure leading to an intrauterine fetal demise. We present 3 cases of TRAP Sequence pregnancy diagnosed during the second or third trimesters of pregnancy. There are minimal sonographic tools for the guidance of a fetal therapeutic interventional procedure during the second trimester or timing of delivery during the third trimester to reduce morbidity and mortality of a viable fetus. Tei index may be a useful sonographic tool in the management of TRAP Sequence during the second or third trimester of pregnancy.
双胎反向动脉灌注序列（TRAP序列）是单绒毛膜双胎妊娠的一种罕见并发症。若不进行干预，TRAP序列病例中存活的泵血胎儿可能会发生高输出量心力衰竭，导致宫内胎儿死亡。我们报告3例在妊娠中期或晚期诊断出的TRAP序列妊娠病例。在妊娠中期，用于指导胎儿治疗性介入操作的超声工具极少；在妊娠晚期，用于指导分娩时机的超声工具也极少，而这两种情况都会增加存活胎儿的发病率和死亡率。Tei指数可能是妊娠中期或晚期管理TRAP序列时一种有用的超声工具。
