What could be the result of fetal head compression?
Uteroplacental insufficiency.
Spontaneous rupture of membranes.
Altered fetal cerebral blood flow.
Umbilical cord compression.
The Correct Answer is A
Choice A rationale: Uteroplacental insufficiency causes late decelerations due to reduced oxygenation, not mechanical pressure. It reflects placental dysfunction, not direct cranial compression effects.
Choice B rationale: Spontaneous rupture of membranes increases infection and labor risk but does not directly alter cerebral perfusion or trigger vagal responses linked to head compression.
Choice C rationale: Altered fetal cerebral blood flow results from cranial pressure during contractions, triggering vagal stimulation and early decelerations. This is the physiological response to head compression.
Choice D rationale: Umbilical cord compression causes variable decelerations due to transient blood flow obstruction, unrelated to cranial pressure or cerebral perfusion changes.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
The correct answer is Choice D
Choice A rationale: Notifying the provider is important but not the first priority in this situation. The maternal hypotension (BP 92/54 mm Hg) and elevated maternal heart rate (128/min) suggest decreased perfusion, which can compromise uteroplacental blood flow. Immediate intervention is required before notifying the provider, especially if positioning can restore circulation and fetal oxygenation. Waiting to call without correcting the underlying cause may result in fetal distress or worsening maternal status.
Choice B rationale: While uncontrolled pain may contribute to elevated maternal heart rate, the hypotension and tachycardia suggest a more urgent hemodynamic imbalance. Pain management may become appropriate after stabilizing maternal circulation. Focusing on pain relief first delays essential interventions to improve perfusion, risking fetal compromise due to inadequate uteroplacental oxygen delivery. The fetal heart rate of 130/min is reassuring, but maternal circulation must be prioritized to sustain it.
Choice C rationale: A full bladder can contribute to uterine displacement, but there is no indication in the scenario that bladder distention is an issue. Voiding may be done later but does not address the immediate concern of maternal hypotension and compensatory tachycardia. Uteroplacental perfusion depends heavily on maternal blood pressure, and bladder status has secondary importance in the acute phase of circulatory compromise.
Choice D rationale: Elevating one hip improves venous return and cardiac output by relieving pressure on the inferior vena cava, which is compressed by the gravid uterus in the supine position. This correction reduces hypotension and restores uteroplacental perfusion. The maneuver is a first-line response for maternal hypotension in labor, helping stabilize both mother and fetus quickly. Fetal oxygen delivery depends on adequate maternal perfusion, which this position supports.
Correct Answer is A
Explanation
Choice A rationale
Rh(D) immunoglobulin prevents the formation of Rh antibodies in mothers who are Rh negative. If an Rh-negative mother is exposed to Rh-positive blood, as can happen during pregnancy or childbirth, her immune system may respond by making antibodies against the Rh antigen. This can cause problems in future pregnancies if the baby is Rh positive. Rh(D) immunoglobulin works by preventing the mother’s immune system from recognizing the Rh antigen, thus preventing the formation of antibodies.
Choice B rationale
Rh(D) immunoglobulin does not destroy Rh antibodies in mothers who are Rh negative. Once antibodies have formed, they cannot be destroyed by Rh(D) immunoglobulin.
Choice C rationale
Rh(D) immunoglobulin does not prevent the formation of Rh antibodies in newborns who are Rh positive. The purpose of Rh(D) immunoglobulin is to prevent the mother from forming Rh antibodies.
Choice D rationale
Rh(D) immunoglobulin does not destroy Rh antibodies in newborns who are Rh positive. The purpose of Rh(D) immunoglobulin is to prevent the mother from forming Rh antibodies.
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