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 JoVE Medicine

Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye

1Division of Neonatology, Department of Pediatrics, Leiden University Medical Center, 2Division of Fetal Therapy, Department of Obstetrics, Leiden University Medical Center, 3Department of Obstetrics, Leiden University Medical Center


JoVE 3208

Twin-to-twin transfusion syndrome and twin anemia polycythemia sequence are two potentially devastating problems in perinatal medicine. Both disorders occur only in monochorionic twins and result from unbalanced blood flow through placental vascular anastomoses. We provide a simple protocol to accurately evaluate the presence of vascular anastomoses using colored dye injection of placental vessels after birth.

 JoVE Medicine

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

1Division of Pediatric and Fetal Surgery, Department of Surgery, University of California, San Francisco, 2Department of Pathology, University of Alberta, 3Department of Obstretics and Gynecology, University of California, San Francisco, 4Department of Radiology, University of California, San Francisco


JoVE 2837

Vascular mapping of monochorionic (MC) twin placentas after birth provides a means for detailed demonstration of vascular connections between the twins’ circulations. Imbalance of these connections is thought to play a pivotal role in the development of complications of MC twinning including twin-to-twin transfusion syndrome.

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