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Middle Cerebral Artery Doppler Peak Systolic Velocity In The Evaluation Of Fetal Anemia


1. The estimated risk of anemia due to alloimmunization is:

a. 1.5/1000 livebirths

b. 2.5/1000 livebirths

c. 3.5/1000 livebirths

d. 4.5/1000 livebirths

e. 5.5/1000 livebirths

2. All of the following sonographic markers have been evaluated to predict anemia except:

a. Placental thickness

b. Adrenomegaly

c. Cardiomegaly

d. The right lobe of the liver

e. Splenic perimeter

3. Extramedullary erythropoiesis begins at a hemoglobin level of:

a. 12 gm/dl

b. 10 gm/dl

c. 8 gm/dl

d. 6 gm/dl

e. 2 gm/dl

4. Cardiac output can be used to reliably predict the extent of fetal anemia.

a. True

b. False


5. Intracardiac and venous Doppler studies cannot accurately predict anemia.

a. True

b. False

6. By using angle independent indices or vessel measurements that require angle correction, the extent of fetal anemia can be accurately determined.

a. True

b. False

7.  Which of the following statements about the middle cerebral artery peak systolic velocity (MCA-PSV) is false:

a. The angle of insonation should be close to zero and the Doppler gate placed in the center of the vessel

b. The vessel should be insonated close to its demarcation from the Circle of Willis.

c. The MCA-PSV does not accurately reflect severe anemia with Kell sensitization

d. Once the fetal hemoglobin is below 1-3 gm/dl, the velocity in the MCA does not continue to rise.

 

8. The MCA-PSV is similar or better than amniotic fluid OD450 in the prediction of anemia

a. True

b. False

9. Fetuses in the active state may have an increase in the MCA-PSV of up to:

a. 5%

b. 10%

c. 15%

d. 20%

10. The MCA-PSV is no longer valid after ________ weeks' gestation.

a. 32

b. 33

c. 34

d. 35

e. 36


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