AWHONN Intermediate Fetal Monitoring
Questions with 100% Correct Answers
Which of the following is an extrinsic influence on the FHR?
The most highly oxygenated blood in fetal circulation is carried by
ductus venosus
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 baseline that are irregular in
_________ and __________.
amplitude and frequency
An increase in FHR immediately preceding a variable deceleration is caused by:
occlusion of the umbilical vein
When assessing a FHR tracing, the first step is to
establish a baseline rate
Which deceleration in the FHR is considered benign and does not require an
intervention to correct?
early deceleration
If the umbilical vein is the only vessel occluded during cord compression
oxygenated blood may be restricted from being delivered to the fetus
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 the
intervillous space
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 results are:
pH: 6.95
pCO2: 86 mmHg
pO2: 4 mmHg
BE: -18.6 mEq/L
These results are best interpreted as:
mixed acidemia
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?
Questions with 100% Correct Answers
Which of the following is an extrinsic influence on the FHR?
The most highly oxygenated blood in fetal circulation is carried by
ductus venosus
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 baseline that are irregular in
_________ and __________.
amplitude and frequency
An increase in FHR immediately preceding a variable deceleration is caused by:
occlusion of the umbilical vein
When assessing a FHR tracing, the first step is to
establish a baseline rate
Which deceleration in the FHR is considered benign and does not require an
intervention to correct?
early deceleration
If the umbilical vein is the only vessel occluded during cord compression
oxygenated blood may be restricted from being delivered to the fetus
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 the
intervillous space
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 results are:
pH: 6.95
pCO2: 86 mmHg
pO2: 4 mmHg
BE: -18.6 mEq/L
These results are best interpreted as:
mixed acidemia
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?
