During the delivery, which fetal position would be considered optimal for a vaginal birth?
Occiput anterior.
Occiput posterior.
Breech.
Transverse.
The Correct Answer is A
Choice A rationale
The occiput anterior (OA) position is considered the optimal fetal position for vaginal birth. In this position, the baby’s head is down, and the back of the head (occiput) is facing the mother’s front. This position allows for the most efficient passage through the birth canal.
Choice B rationale
The occiput posterior (OP) position, where the baby’s head is down but facing the mother’s back, can lead to a longer and more painful labor. It is not considered optimal for vaginal birth.
Choice C rationale
Breech positions, where the baby’s buttocks or feet are positioned to come out first, are not optimal for vaginal birth and often require a cesarean section due to the increased risk of complications.
Choice D rationale
The transverse position, where the baby is lying sideways across the uterus, is not suitable for vaginal birth. This position typically requires a cesarean section to safely deliver the baby.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Terbutaline is a beta-adrenergic agonist that works by relaxing the smooth muscles of the uterus, thereby reducing uterine contractions. It is commonly used in cases of tachysystole and recurrent late decelerations to decrease uterine activity and improve fetal oxygenation. Terbutaline’s mechanism of action involves stimulating beta-2 adrenergic receptors, which leads to an increase in cyclic AMP and subsequent relaxation of uterine smooth muscle.
Choice B rationale
Oxytocin is a hormone that stimulates uterine contractions and is typically used to induce or augment labor. Administering oxytocin in a situation where there is already tachysystole and recurrent late decelerations would exacerbate the problem by increasing uterine contractions, potentially leading to further fetal distress.
Choice C rationale
Misoprostol is a prostaglandin analog used to ripen the cervix and induce labor. Similar to oxytocin, it would not be appropriate in this scenario as it would increase uterine contractions, worsening the tachysystole and late decelerations.
Choice D rationale
Magnesium sulfate is primarily used as a tocolytic to prevent preterm labor and as a neuroprotective agent for the fetus in cases of preeclampsia. While it has some uterine relaxation properties, it is not the first-line treatment for reducing uterine activity in the context of tachysystole and late decelerations.
Correct Answer is B
Explanation
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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