WorksheetsFetal Heart Rate Monitor Review Questions #1
Total questions: 10
Worksheet time: 10mins
Variability is a function of the autonomic nervous system and therefore, may be affected by:
Certain medications such as sedatives and analgesics
Increased oxygen flow
Maternal movement
According to NICHD definition, the baseline fetal heart rate is the approximate mean FHR rounded to increments of 5 bpm which is:
Determined between contractions
Determined after excluding periodic or episodic changes during a 10-minute segment.
Determined during a minimum of a 30-minute segment.
The preterm fetus will have minimal variability as a result of:
An immature autonomic nervous system.
An immature voluntary system.
An immature respiratory system.
Decreased blood flow to the fetus resulting in decreased oxygen delivery to the fetus may be the result of:
IV analgesics.
Maternal anxiety.
Maternal hypotension.
Tachysystole is defined as:
Greater than 5 contractions in 10-minutes, averaged over 10-minute segment of tracing.
Greater then 5 contractions in 10-minutes, averaged over a 30-minute time interval.
Occurring every 1-2 minutes during a 10-minute window.
Sinusoidal pattern can be documented when
cycles are 4-6 beats per minute in frequency.
the pattern lasts 20 minutes or longer.
there is moderate or minimal variability.
When looking at the fetal heart rate, the most important characteristic to determine the absence of metabolic acidemia is
absence of late decelerations.
baseline rate within normal range.
presence of moderate variability.
A baseline tachycardia occurs when the fetal heart rate
accelerates greater than 15 beats above the baseline
is 160 beats or higher for greater than 10 minutes
is 160 beats or higher for greater than 2 minutes but less than 10 minutes
A baseline bradycardia occurs when the fetal heart rate is
below 120 for more than 10 minutes
below 110 for more than 2 minutes but less than 10 minutes
below 110 for more than 10 minutes
Amplitude range of the baseline defines baseline
change
rate
variability
