Case challenge · Imaging / Fetal medicine / Maternal-fetal medicine · teaching

Fetal Anemia (MCA-PSV) · case challenge

Given a case, work through the care pathway step by step; the tool checks each choice and scores you. Decisions and basis are taken from this site's reviewed care pathways.

← View the full flowchartBased on Mari 2002

Case #1Imaging / Fetal medicine / Maternal-fetal medicine

📋 Case data

MCA-PSV (MoM) + cause + hydropsMCA-PSV ≥1.5 MoM or hydrops present

Data is taken from this pathway's reviewed node text. Work through the pathway step by step.

Step 1 / 1 · MCA-PSV (MoM) + cause + hydrops

MCA-PSV (MoM) + cause + hydrops?

💡 Anemia → reduced viscosity + raised cardiac output → raised MCA-PSV. Mari: MCA-PSV ≥1.5 MoM predicts moderate-severe anemia (sensitivity 100%, specificity 88%). Measure at the proximal MCA origin, zero angle, no fetal movement. Causes to check: red-cell alloimmunization (maternal antibodies), parvovirus, fetomaternal hemorrhage, alpha-thalassemia, TAPS.

For teaching. Decisions and their basis are taken from this site's reviewed care pathways; for licensed clinicians/trainees, this does not replace clinical judgment or local protocols.