The slight overlapping of cranial bones or shaping of the fetal head during labor is called:

Valsalva maneuver.

Ferguson’s reflex.

Lightening.

Molding.

Answer and Explanation

The Correct Answer is D

Choice A rationale
Valsalva maneuver involves forced expiration against a closed airway, increasing intrathoracic pressure and commonly used to expel the fetus during the second stage of labor.
Choice B rationale
Ferguson’s reflex involves the release of oxytocin due to vaginal and cervical stretching, leading to stronger contractions during the second stage of labor.
Choice C rationale
Lightening refers to the descent of the fetus into the pelvis before labor begins, reducing pressure on the diaphragm and making breathing easier.
Choice D rationale
Molding is the slight overlapping of cranial bones, allowing the fetal head to change shape and fit through the birth canal during labor.

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Correct Answer is D

Explanation

Choice A rationale
The maternal-fetal exchange of oxygen and waste products is affected by uterine contractions, as these compress the placental blood vessels, temporarily reducing blood flow.
Choice B rationale
Blood pressure variations during labor can influence perfusion but do not increase maternal-fetal exchange as uterine contractions primarily cause transient vascular compression.
Choice C rationale
Maternal-fetal exchange continues during contractions except when the uterine pressure is high enough to occlude placental blood flow, temporarily halting the exchange.
Choice D rationale
Uterine contractions compress the spiral arteries, reducing blood flow through the placenta, thereby diminishing maternal-fetal exchange of oxygen and waste products during contractions.

A. Placental insufficiency. B. Abruption. C. Head compression. D. Cord compression.

Correct Answer is D

Explanation

Choice A rationale
Placental insufficiency leads to late decelerations due to diminished blood flow, resulting in gradual decreases in fetal heart rate. This differs from the abrupt changes seen with cord compression.
Choice B rationale
Abruption manifests with symptoms such as painful bleeding and uterine tenderness, rather than specific heart rate patterns like those caused by cord compression.
Choice C rationale
Head compression produces early decelerations with a characteristic mirror image of contractions, unlike the abrupt heart rate drops seen with cord compression.
Choice D rationale
Cord compression results in variable decelerations, which are abrupt decreases in fetal heart rate due to intermittent reductions in oxygen supply. This matches the tracing pattern described.

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The slight overlapping of cranial bones or shaping of the fetal head during labor is called:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The maternity nurse understands that as the uterus contracts during labor, maternal-fetal exchange of oxygen and waste products:

Correct Answer is D

Explanation

The fetal monitor tracing shown is associated with:

Correct Answer is D

Explanation

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