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Which of the following is an extrinsic influence on the FHR? - ✔✔C. Fetal-placental circulation
The most highly oxygenated blood in fetal circulation is carried by: - ✔✔C. Ductus venosus
If fetal arterial pressure begins to fall below normal levels: - ✔✔A. Baroreceptors cause vasoconstriction
and increase the FHR
Fetal heart rate variability is defined as fluctuations in the baseline that are irregular in _____ and _____.
- ✔✔B. Amplitude and frequency
An increase in the fetal heart rate immediately preceding a variable deceleration is caused by: - ✔✔A.
Occlusion of the umbilical vein
When assessing a FHR tracing, the first step is to: - ✔✔C. Establish the baseline rate
Which deceleration in the FHR is considered benign and does not require an intervention to correct? -
✔✔A. Early deceleration
If the umbilical vein is the only vessel occluded during cord compression - ✔✔B. Oxygenated blood may
be restricted from being delivered to the fetus
During a fetal sleep cycle, FHR variability is usually ____. - ✔✔C. Minimal
Uterine tachysystole is defined as: - ✔✔B. >5 contractions in 10 mind over 30 minutes
, Maternal-fetal oxygen and nutrient transfer takes place in the: - ✔✔B. intervillous space
During a contraction, the tocodynamometer detects: - ✔✔A. Pressure created by tensing of uterine
muscle
Normal fetal heart rate baseline is: - ✔✔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: - ✔✔C. Mixed acidemia
A characteristic of variable decelerations is: - ✔✔B. The onset of the deceleration is abrupt
Stimulation of the vagus nerve in a healthy fetus will cause: - ✔✔A. A decrease in the fetal heart rate
What is the baseline rate? - ✔✔B. 145 bpm
What is the correct interpretation? - ✔✔B. Baseline of 160 bpm with recurrent late decelerations
What is the primary physiologic goal? - ✔✔B. Maximize oxygenation
Based on the tracing, the most appropriate interventions are: - ✔✔B. Decrease oxytocin from 14 to 7
mU/min and start a 500-mL IVFB.
Which of the following is a correct interpretation of the tracing? - ✔✔C. The tracing of uterine activity
requires palpation for accurate assessment