In which clinical situation would the nurse most likely anticipate a fetal bradycardia?
Drug consumed by the mother like cocaine.
Prolonged umbilical cord compression.
Fetal anemia.
Tocolytic treatment using terbutaline.
The Correct Answer is B
Choice A rationale
Cocaine is a stimulant that typically causes fetal tachycardia (an elevated fetal heart rate) due to its sympathomimetic effects, increasing maternal and subsequently fetal heart rate and blood pressure. It does not usually lead to fetal bradycardia.
Choice B rationale
Prolonged umbilical cord compression can lead to fetal bradycardia because it restricts oxygenated blood flow to the fetus. The baroreceptors in the fetus respond to decreased oxygen by slowing the heart rate in an attempt to conserve oxygen and maintain perfusion to vital organs.
Choice C rationale
Fetal anemia, a decrease in red blood cell count, can lead to fetal tachycardia as the heart attempts to compensate for reduced oxygen-carrying capacity by increasing cardiac output. Bradycardia is not a typical initial response to fetal anemia.
Choice D rationale
Terbutaline is a tocolytic medication used to relax the smooth muscle of the uterus and prevent preterm labor. Its side effects often include maternal and fetal tachycardia due to its beta-adrenergic agonist activity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Spontaneous rupture of membranes (SROM) can sometimes be associated with variable decelerations due to potential cord compression if the presenting part is not well applied, but it is not the most likely cause of early decelerations. Early decelerations reflect a physiological response to fetal head compression.
Choice B rationale
Fetal head compression during a contraction leads to vagal nerve stimulation, causing a transient decrease in the fetal heart rate. This deceleration is typically gradual in onset and recovery, mirroring the contraction pattern, and is considered a benign finding.
Choice C rationale
Umbilical cord compression typically results in variable decelerations, which are abrupt decreases in FHR that are not necessarily associated with uterine contractions. The shape and timing of variable decelerations differ significantly from the gradual, consistent pattern of early decelerations.
Choice D rationale
Utero-placental insufficiency usually manifests as late decelerations, which are gradual decreases in FHR that begin after the peak of the contraction and recover after the contraction ends. This pattern indicates fetal hypoxia and is a concerning finding, distinct from early decelerations.
Correct Answer is D
Explanation
Choice A rationale
Preparing to administer a prescribed oxytocic preparation is a possible intervention for postpartum hemorrhage, but the immediate first step should be to assess the uterus, the most common source of early postpartum bleeding.
Choice B rationale
Assessing the client's blood pressure is important in evaluating the extent of blood loss, but it is not the initial action to take. Addressing the likely cause of the bleeding should precede further assessment of vital signs.
Choice C rationale
Assessing the bladder for distention is important as a full bladder can displace the uterus and interfere with its contraction, potentially contributing to bleeding. However, directly addressing the uterine tone is the immediate first step.
Choice D rationale
Massaging the client's fundus is the priority action because uterine atony, a soft and non-contracted uterus, is the most frequent cause of early postpartum hemorrhage. Stimulating the uterus to contract by massage helps to compress the blood vessels at the placental site and decrease bleeding. .
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