56

CASE 56

History: A patient presents for a routine second-trimester prenatal ultrasound scan.

1. What should be included in the differential diagnosis for reversed diastolic flow of the umbilical artery? (Choose all that apply.)

A. Intrauterine growth restriction (IUGR)

B. Fetal asphyxia

C. Perinatal mortality

D. Permanent fetal neurologic sequelae

2. What is the purpose of measuring the flow in the middle cerebral artery (MCA)?

A. To determine whether a compensatory, brain-sparing fetal response has occurred as a result of decreased umbilical artery diastolic flow

B. To look for an aneurysm

C. To look for an infarct

D. To look for a stenotic vessel

3. What is the normal change in umbilical artery Doppler as gestational age increases?

A. The resistance increases.

B. The systolic velocity increases.

C. The resistance decreases.

D. A tardus parvus waveform develops after the first trimester.

4. How is umbilical artery impedance measured?

A. Ratio of peak systolic velocity divided by end-diastolic velocity

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Tags: Obstetric and Gynecologic Ultrasound Case Review Series

Jan 10, 2016 | Posted by admin in OBSTETRICS & GYNAECOLOGY IMAGING | Comments Off

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