Abstract
Twin–twin transfusion syndrome is characterized by unequal blood exchange from the donor twin to the recipient co-twin through placental vascular anastomoses. Treatment of twin–twin transfusion syndrome consists of serial amnioreduction, septostomy, laser photocoagulation of placental vessels and umbilical cord occlusion of the apparently sick twin. Amnioreduction reduces maternal discomfort due to polyhydramnios and improves fetal circulation by reducing amniotic fluid pressure on the placenta. Septostomy equalizes amniotic fluid pressure between the two gestational sacs. Laser therapy interrupts intertwin blood shunting and restores two independent circulations. Umbilical cord occlusion is offered when signs of imminent death are present, such as hydrops and cardiac failure. Laser therapy is associated with increased neonatal survival rates and lower risk of adverse outcomes compared with other treatments.
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