The nurse observes variable decelerations on the fetal monitor tracing.
Which of the following is a correct interpretation of this finding?
Variable decelerations are related to the use of narcotic analgesics.
Variable decelerations are due to umbilical cord compression.
Variable decelerations are caused by maternal hypotension.
Variable decelerations are indicative of fetal hypoxia.
The Correct Answer is B
Choice A rationale
Variable decelerations are not related to the use of narcotic analgesics. Narcotic analgesics can cause other fetal heart rate changes, such as decreased variability, but they do not cause variable decelerations.
Choice B rationale
Variable decelerations are due to umbilical cord compression. This is the correct interpretation. Umbilical cord compression can lead to transient decreases in fetal blood flow and oxygenation, resulting in variable decelerations on the fetal monitor tracing.
Choice C rationale
Variable decelerations are not caused by maternal hypotension. Maternal hypotension can lead to late decelerations due to uteroplacental insufficiency, but it does not cause variable decelerations.
Choice D rationale
Variable decelerations are not indicative of fetal hypoxia. While severe and persistent variable decelerations can lead to fetal hypoxia, the primary cause of variable decelerations is umbilical cord compression.
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Correct Answer is A
Explanation
Choice A rationale
Breech presentation means the fetus’s buttocks or feet are positioned to be delivered first. Fetal heart tones are often heard above the umbilicus in this position.
Choice B rationale
Transverse lie means the fetus is lying horizontally in the uterus. Fetal heart tones would typically be heard at the sides of the abdomen.
Choice C rationale
Cephalic presentation means the fetus’s head is positioned to be delivered first. Fetal heart tones are usually heard below the umbilicus in this position.
Choice D rationale
Oblique lie means the fetus is positioned diagonally in the uterus. Fetal heart tones can be variable depending on the exact position.
Correct Answer is A
Explanation
Choice A rationale
A non-stress test (NST) is a common initial assessment for decreased fetal movement. It evaluates fetal heart rate patterns in response to fetal movements, providing information about fetal well-being and oxygenation.
Choice B rationale
A biophysical profile (BPP) is a more comprehensive assessment that includes an NST and ultrasound evaluation of fetal movements, tone, breathing, and amniotic fluid volume. It may be ordered if the NST results are non-reassuring or if there are other concerns.
Choice C rationale
An ultrasound can provide valuable information about fetal growth, amniotic fluid volume, and placental function. It may be used in conjunction with other tests but is not the first-line assessment for decreased fetal movement.
Choice D rationale
Amniocentesis is an invasive procedure used for specific indications, such as genetic testing or assessing fetal lung maturity. It is not typically used for initial assessment of decreased fetal movement.