Questions and Answers (A+ Solution guide)
Which of the following is an extrinsic influence on the FHR? - (answer)C. Fetal-
placental circulation
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The most highly oxygenated blood in fetal circulation is carried by: - (answer)C.
Ductus venosus
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. Oxygenated blood may be restricted from being delivered to the fetus
, During a fetal sleep cycle, FHR variability is usually . - (answer)C. Minimal
Uterine tachysystole is defined as: - (answer)B. >5 contractions in 10 mind over 30
minutes
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Maternal-fetal oxygen and nutrient transfer takes place in the: - (answer)B.
intervillous space
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