The most highly oxygenated blood in fetal circulation is carried by: - ANSWER C. Ductus
venosus
Which of the following is an extrinsic influence on the FHR? - ANSWER C. Fetal-placental
circulation
If fetal arterial pressure begins to fall below normal levels: - ANSWER A. Baroreceptors
cause vasoconstriction and increase the FHR
Fetal heart rate variability is defined as fluctuations in the baseline that are irregular in
_____ and _____. - ANSWER B. Amplitude and frequency
An increase in the fetal heart rate immediately preceding a variable deceleration is caused
by: - ANSWER A. Occlusion of the umbilical vein
When assessing a FHR tracing, the first step is to: - ANSWER C. Establish the baseline rate
Which deceleration in the FHR is considered benign and does not require an intervention to
correct? - ANSWER A. Early deceleration
If the umbilical vein is the only vessel occluded during cord compression - ANSWER B. Ox-
ygenated blood may be restricted from being delivered to the fetus
During a fetal sleep cycle, FHR variability is usually ____. - ANSWER C. Minimal
1
, Maternal-fetal oxygen and nutrient transfer takes place in the: - ANSWER B. intervillous
space
Uterine tachysystole is defined as: - ANSWER B. >5 contractions in 10 mind over 30
minutes
During a contraction, the tocodynamometer detects: - ANSWER A. Pressure created by
tensing of uterine muscle
Normal fetal heart rate baseline is: - ANSWER C. 110-160 bpm
Following birth, a fetal cord blood sample is taken. The results are:
pH: 6.95
pCO2: 86 mmHg
pO2: 4mmHg
BE: -18.6 mEq/L
These results are best interpreted as: - ANSWER C. Mixed acidemia
A characteristic of variable decelerations is: - ANSWER B. The onset of the deceleration is
abrupt
Stimulation of the vagus nerve in a healthy fetus will cause: - ANSWER A. A decrease in
the fetal heart rate
What is the baseline rate? - ANSWER B. 145 bpm
What is the correct interpretation? - ANSWER B. Baseline of 160 bpm with recurrent late
decelerations
2
venosus
Which of the following is an extrinsic influence on the FHR? - ANSWER C. Fetal-placental
circulation
If fetal arterial pressure begins to fall below normal levels: - ANSWER A. Baroreceptors
cause vasoconstriction and increase the FHR
Fetal heart rate variability is defined as fluctuations in the baseline that are irregular in
_____ and _____. - ANSWER B. Amplitude and frequency
An increase in the fetal heart rate immediately preceding a variable deceleration is caused
by: - ANSWER A. Occlusion of the umbilical vein
When assessing a FHR tracing, the first step is to: - ANSWER C. Establish the baseline rate
Which deceleration in the FHR is considered benign and does not require an intervention to
correct? - ANSWER A. Early deceleration
If the umbilical vein is the only vessel occluded during cord compression - ANSWER B. Ox-
ygenated blood may be restricted from being delivered to the fetus
During a fetal sleep cycle, FHR variability is usually ____. - ANSWER C. Minimal
1
, Maternal-fetal oxygen and nutrient transfer takes place in the: - ANSWER B. intervillous
space
Uterine tachysystole is defined as: - ANSWER B. >5 contractions in 10 mind over 30
minutes
During a contraction, the tocodynamometer detects: - ANSWER A. Pressure created by
tensing of uterine muscle
Normal fetal heart rate baseline is: - ANSWER C. 110-160 bpm
Following birth, a fetal cord blood sample is taken. The results are:
pH: 6.95
pCO2: 86 mmHg
pO2: 4mmHg
BE: -18.6 mEq/L
These results are best interpreted as: - ANSWER C. Mixed acidemia
A characteristic of variable decelerations is: - ANSWER B. The onset of the deceleration is
abrupt
Stimulation of the vagus nerve in a healthy fetus will cause: - ANSWER A. A decrease in
the fetal heart rate
What is the baseline rate? - ANSWER B. 145 bpm
What is the correct interpretation? - ANSWER B. Baseline of 160 bpm with recurrent late
decelerations
2
