Doppler Velocimetry & Fetal Complications
Doppler surveillance in fetal growth restriction (FGR) and complicated multiple gestations (TTTS, sFGR, TRAP).
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Detailed Course Syllabus
Principles of Clinical Doppler Physics
Sample volume sizing, wall filter settings, aliasing correction, and angle correction.
FGR Hemodynamic Progression Cascade
Early vs late FGR phenotypes, Doppler thresholds, and safe delivery timing.
Monochorionic Twin Complications
TTTS Quintero Stages I–V, Twin Anemia-Polycythemia Sequence (TAPS), and selective FGR.
Cervical Length Surveillance
Transvaginal cervical length measurement for preterm labor prevention.
Learning Objectives
- Obtain clean Doppler waveforms with insonation angle < 30° in the umbilical and middle cerebral arteries.
- Calculate and clinically interpret the Cerebroplacental Ratio (CPR) for brain-sparing redistribution.
- Recognize the sequence of hemodynamic failure: UA AEDV -> REDV -> MCA vasodilation -> Ductus Venosus a-wave reversal.
- Diagnose Twin-to-Twin Transfusion Syndrome (TTTS) using Quintero staging criteria.
Clinical Relevance
Doppler velocimetry is the premier clinical tool for balancing the risks of prematurity against the danger of intrauterine stillbirth in growth-restricted fetuses.
Clinical Guidelines Aligned
- SMFM Consult Series: Fetal Growth Restriction
- ISUOG Guidelines: Role of Ultrasound in Monochorionic Multiple Gestations
Explore Other Courses
Sonoembryology Course (Weeks 1 to 11)
Interactive exploration of early pregnancy ultrasound findings, developmental landmarks, and pitfalls.
Detailed First-Trimester Scan (12w 0d to 13w 6d)
Early anatomical survey, nuchal translucency caliper calibration, nasal bone assessment, and aneuploidy risk calculation.
Second and Third Trimesters (≥16+0 weeks)
Systematic screening of fetal structural anatomy, biometry measurements, and placental assessment.