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Diagnostic ultrasound ( PDFDrive )

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1128 PART IV Obstetric and Fetal Sonography

A

B

C

D

E

FIG. 32.15 Twin Reversed Arterial Perfusion Sequence, Doppler Analysis.

(A) Proile of healthy twin 1 (seen particularly well because of polyhydramnios).

(B) Normal direction of venous low in the intrahepatic umbilical vein (into the fetus)

of twin 1. (C) Normal direction of arterial low in the umbilical artery (out of the

fetus) in twin 1. (D) Abnormal proile and body of the acardiac twin 2, with marked

skin thickening and oligohydramnios. (E) Abnormal reversed arterial low (into the

fetus) in the umbilical artery of twin 2.

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