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Practice questions for this set
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If fetal arterial pressure begins to fall below normal levels
Choose an answer
baroreceptors cause vasodilation and
1 2 baroreceptors have no effect on FHR
decrease FHR
baroreceptors increase blood flow to the baroreceptors cause vasoconstriction and
3 4
placenta increase FHR
Don't know?
Which of the following is an extrinsic influence on the
FHR?
The most highly oxygenated blood in fetal circulation is ductus venosus
carried by
If fetal arterial pressure begins to fall below normal levels baroreceptors cause vasoconstriction and increase FHR
, Fetal heart rate variability is defined as fluctuations in the amplitude and frequency
baseline that are irregular in _________ and __________.
An increase in FHR immediately preceding a variable occlusion of the umbilical vein
deceleration is caused by:
When assessing a FHR tracing, the first step is to establish a baseline rate
Which deceleration in the FHR is considered benign and early deceleration
does not require an intervention to correct?
If the umbilical vein is the only vessel occluded during oxygenated blood may be restricted from being delivered to the fetus
cord compression
During fetal sleep cycle, FHR variability is usually minimal
Uterine tachysystole is defined as < 5 contractions in 10 minutes averaged over 30 minutes
Maternal-fetal oxygen and nutrient transfer takes place in intervillous space
the
During a contraction, the toco detects pressure created by the tensing of uterine muscles
Normal FHR baseline is 110-160
Following birth, a fetal cord blood sample is taken. The mixed acidemia
results are:
pH: 6.95
pCO2: 86 mmHg
pO2: 4 mmHg
BE: -18.6 mEq/L
These results are best interpreted as:
A characteristic of variable decelerations is: the onset of the deceleration is abrupt
stimulation of the vagus nerve in a healthy fetus will cause a decrease in the FHR
Assess the tracing. What is the baseline rate? 145
Assess the tracing. What is the correct interpretation? Baseline of 160bpm with recurrent late decelerations
Assess the tracing: what is the primary physiologic goal? maximize oxygenation
Assess the tracing. The patient is a 20-year-old G1 at 41 Decrease oxytocin from 14 to 7 mU/min and start a 500-mL IVFB.
weeks undergoing induction of labor. She is 4 cm/80%/-1
and the oxytocin dose is currently 14 mU/min. Based on
the tracing, the most appropriate interventions are: