When the mother's membranes rupture during active labor, the fetal heart rate should be observed for the occurrence of which periodic pattern?
Increase in baseline variability.
Non-periodic accelerations.
Early decelerations.
Variable decelerations.
The Correct Answer is D
Choice A rationale
An increase in baseline variability is generally considered a reassuring sign of fetal well-being, indicating a responsive central nervous system and adequate oxygenation. While important to monitor, it is not a specific periodic pattern to observe immediately following membrane rupture due to potential cord compression. Normal baseline variability ranges from 6 to 25 beats per minute.
Choice B rationale
Non-periodic accelerations are abrupt increases in fetal heart rate above the baseline, typically lasting less than 30 seconds. They are usually a reassuring sign, often occurring with fetal movement or stimulation. While their presence is noted, they are not the primary periodic pattern to observe immediately after membrane rupture for potential complications.
Choice C rationale
Early decelerations are gradual decreases in fetal heart rate that mirror the uterine contractions. They are thought to be caused by fetal head compression and are generally considered benign. While their presence is documented, they are not the most concerning pattern immediately after membrane rupture, which raises the risk of cord issues.
Choice D rationale
Variable decelerations are abrupt decreases in fetal heart rate that are variable in timing and shape in relation to uterine contractions. They are often caused by umbilical cord compression, which is a significant risk factor immediately following the rupture of membranes, as the fluid cushion around the cord is reduced. Prompt identification is crucial for intervention.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Hypotonic uterine dysfunction typically occurs in the active phase of labor (after 4 cm cervical dilation) and is characterized by weak, infrequent, and ineffective contractions that do not lead to cervical change. The client in the latent phase with slow cervical change is not yet in the active phase.
Choice B rationale
The latent phase of the first stage of labor is characterized by irregular, mild to moderate contractions that cause slow, gradual cervical dilation and effacement. It can be lengthy, especially in primigravidas, and the discomfort can be significant. A cervical dilation of 2 cm with no change in 3 hours in the presence of painful, erratic contractions every 5 to 10 minutes aligns with a normal latent phase.
Choice C rationale
Hypertonic uterine dysfunction usually occurs in the latent phase and is characterized by frequent, uncoordinated, and strong contractions that are ineffective in causing cervical dilation or effacement. While the contractions are painful, they are not described as excessively strong or uncoordinated, and the client is in the expected early stage of labor.
Choice D rationale
Precipitous labor is a very rapid labor and delivery, typically lasting less than 3 hours from the onset of regular contractions to expulsion of the fetus. The client's labor is progressing slowly, with minimal cervical change over 3 hours, which is the opposite of precipitous labor.
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.
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