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Related Experiment Video

Updated: Jul 16, 2026

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
09:51

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Published on: March 21, 2018

Twin-twin transfusion syndrome modeling.

Jeroen P H M VAN DEN Wijngaard1, Michael G Ross, Martin J C VAN Gemert

  • 1Laser Center and Department of Obstetrics and Gynecology, Academic Medical Center-University of Amsterdam, the Netherlands.

Annals of the New York Academy of Sciences
|March 17, 2007
PubMed
Summary

Twin-twin transfusion syndrome (TTTS) treatments like amnioreduction and laser therapy rapidly resolve abnormal umbilical flows. Laser therapy offers complete TTTS resolution, though it may increase vascular stiffness in the donor twin.

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Area of Science:

  • Perinatology
  • Fetal Medicine
  • Mathematical Modeling in Medicine

Background:

  • Twin-twin transfusion syndrome (TTTS) is a severe complication in monochorionic twins, leading to high mortality and morbidity.
  • TTTS progresses through five distinct stages, from oligohydramnios to fetal demise.
  • A mathematical model for TTTS Stages I-IV has been previously developed.

Purpose of the Study:

  • To investigate the influence of amnioreduction and laser therapy on TTTS Stage III resolution.
  • To simulate treatment effects at two different gestational ages (22 and 28 weeks).

Main Methods:

  • Utilized a mathematical model of TTTS Stages I-IV.
  • Performed simulations for amnioreduction and laser therapy at 22 and 28 weeks gestation.
  • Assessed the resolution of abnormal umbilical flow waves and TTTS sequelae.

Main Results:

  • Both amnioreduction and laser therapy rapidly resolved abnormal umbilical flow waves in the donor twin.
  • TTTS and abnormal flows recurred after amnioreduction.
  • Laser therapy led to complete cessation of fetofetal transfusion and TTTS sequelae resolution.
  • Laser therapy resulted in increased vascular stiffness in the donor twin.

Conclusions:

  • Amnioreduction and laser therapy are effective in rapidly resolving abnormal umbilical flows in TTTS.
  • Laser therapy provides complete resolution of TTTS, preventing recurrence.
  • Increased vascular stiffness in the donor twin post-laser therapy warrants further clinical investigation.