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Updated: Aug 19, 2026

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
09:04

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

Published on: September 5, 2011

[Monochorionic twin pregnancies : dangerous liasons]

Y Ville1

  • 1Département de Gynécologie Obstétrique, Université Paris V, CHI Poissy-St Germain, 78303 Poissy cedex, France. yville@wanadoo.fr.

Journal De Gynecologie, Obstetrique Et Biologie De La Reproduction
|May 11, 2000
PubMed

Monochorionic twin pregnancies are characterized by a shared placental circulation; this induces a high degree of hemodynamic interdependency between the twins. This is particularly dramatic in twin-to-twin transfusion syndrome or when one twin dies in utero. In both conditions, the severity of the hemodynamic imbalance can lead to significant sequelae in 15-25% of the cases. Ischemic accidents can be prevented by interruption of placental anastomoses through laser coagulation of their chorionic branches. This can be performed when intrauterine death of one twin is inevitable or as a first line treatment in severe TTS. In the latter indication it is important to compare this approach with serial amniodrainage.

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