TWIN REVERSED ARTERIAL PERFUSION

Twin reversed arterial perfusion (TRAP) sequence is a phenomenon with poor prognosis which is seen in 1100 of monochorionic twin pregnancies. In TRAP sequence, there is a non-viable, acardiac fetus that has multiple anomalies and a pump fetus that feeds this fetus via vascular anastomosis in the placenta. Its incidence is 1 in 35,000 among all deliveries and one in 100 in monochorionic twin pregnancies (1). While the pump twin is anatomically normal, development is limited in only the lower part of the body in the acardiac twin of which the blood supply is provided from hypoxic blood, as in our case. Mortality is 100 in acardiac twin. Mortality of pump twin is around 50 and death is usually due to heart failure and sometimes prematurity caused by polyhydramnios (2). Herein, we present ultrasonography and Doppler findings of our TRAP case under the light of literature.