THERAPEUTIC CLASS
A Sonographer’s Perspective: Quintero Staging System for Twin-to-Twin Transfusion Syndrome in Monochorionic Twins
Sonography remains the cornerstone in the assessment of twin-to-twin transfusion syndrome in monochorionic
twin pregnancies. Twin-to-twin transfusion is a common complication in monochorionic pregnancies, resulting in
high perinatal morbidity and mortality rates. A disproportionate placental interconnection leads to hypovolemia and
oligohydramnios in the donor twin and hypervolemia and polyhydramnios in the recipient twin. Ruben A. Quintero and
his associates developed a staging system with definite sonographic criteria necessary for prognosis and management
of these pregnancies.
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