RNC-OB EXAM 2025 | ALL QUESTIONS AND
CORRECT ANSWERS | ALREADY GRADED
A+ | VERIFIED ANSWERS | NEWEST EXAM
If a fetal scalp sampling shows pH of 7.23 with non-reassuring fetal heart
rate, the response should be to
a. monitor and repeat sampling in 2-3 hours
b. monitor and repeat sampling in 15-20 minutes
c. immediately repeat sampling and, if no improvement, immediate delivery
---------CORRECT ANSWER-----------------B
The normal fetal blood pH is 7.25-7.35. If the pH falls to a pH of 7.2 or
less, then immediate delivery is indicated because acidosis is present
and presenting a risk to the fetus. The sample is taken transvaginally
with a special lancet that punctures the fetal scalp rather than cuts in
order to prevent bleeding.
The Doppler scan is used to
a. determine the size and shape of the placenta
b. determine the implantation site of the placenta in the uterus
c. measure the flow of blood from the uterine arteries to the placenta --------
-CORRECT ANSWER-----------------C
Aka uterine artery Doppler....used to determine if placental
insufficiency is present. The probe emits high-frequency sound
waves, which are echoed back, and the frequency at which this
occurs is translated into images and graphs that show blood flow.
Doppler is used in conjunction with a placental ultrasound, which is
done to determine the size and shape of the placenta as well as the
placental location, umbilical cord insertion, and number of umbilical
blood vessels.
Fetal heart rate patterns are categorized as baseline,
a. periodic, and episodic
b. normal, and abnormal
