Fetal Asssessment Flashcards
What does a reduced “a” wave suggest on Doppler assessment of the fetal ductus venosus?
A loss of myocardial contractility
a loss of “a” wave reflects a loss of fetal myocardial contractility and is suggestive of fetal hypoxaemia
Which of the following Doppler flow measures is most suggestive of a fetus preferentially redirecting blood flow?
Low middle cerebral artery (MCA) resistance
low MCA resistance is suggestive of preferential redistribution of the fetal cardiac output to its vital organs
What is the main determinant of the fetal abdominal circumference?
The fetal liver size
the fetal abdominal circumference is primarily determined by the size of its liver and reflects glycogen storage
What is the most sensitive determinant in an ultrasound assessment of the estimated fetal weight?
The abdominal circumference
the primary or most sensitive determinant of the estimated fetal weight is its abdominal circumference
At 20-24 weeks gestation, the maternal uterine artery resistance is measured to assess what?
Adequacy of placentation
the uterine artery resistance reflects how well placentation has occurred
What does the umbilical artery Doppler assessment measure?
Placental vascular resistance
the umbilical arterial Doppler provides a direct assessment of the vascular resistance of the placental bed
