A nurse assisting on a labor unit is collecting data about the fetal heart rate pattern of a client in labor.
Which of the following findings should the nurse classify as nonreassuring fetal heart rate patterns? (Select All that Apply.)
Variable decelerations are present.
Early decelerations are present.
FHR variability is decreased.
Accelerations are absent.
Correct Answer : A,C,D,E
Choice A rationale
Variable decelerations are abrupt, unpredictable decreases in fetal heart rate, often V, W, or U shaped. They are caused by umbilical cord compression, which reduces umbilical blood flow, leading to hypoxia and acidemia. This compromises fetal oxygenation and can indicate fetal distress requiring intervention to optimize fetal well-being.
Choice B rationale
Early decelerations are symmetrical, gradual decreases in fetal heart rate that mirror uterine contractions. They are caused by head compression during labor, stimulating the vagus nerve and slowing the heart rate. This is generally considered a benign finding and indicates normal fetal response to uterine contractions.
Choice C rationale
Decreased fetal heart rate (FHR) variability refers to a reduction in the normal fluctuations of the FHR. This indicates reduced central nervous system (CNS) oxygenation and autonomic nervous system activity, often due to fetal hypoxia, acidemia, or CNS depressant medications. Sustained decreased variability is a significant nonreassuring sign.
Choice D rationale
Absent accelerations mean the fetal heart rate does not spontaneously increase by 15 beats per minute for at least 15 seconds. Fetal accelerations indicate a healthy, oxygenated fetal central nervous system and are a sign of fetal well-being. Their absence suggests potential fetal hypoxemia or acidosis.
Choice E rationale
A fetal heart rate baseline higher than expected, typically above 160 beats per minute, is classified as fetal tachycardia. This can be caused by maternal fever, infection, fetal hypoxia, or certain medications. Sustained tachycardia can increase fetal metabolic demand and potentially lead to fetal decompensation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C","D"]
Explanation
Choice A rationale
A calm environment in the client's room reduces sensory overstimulation and promotes relaxation. This physiological state minimizes sympathetic nervous system activation, thereby reducing the perception of pain and allowing the client to better cope with labor contractions through a less intense physiological response.
Choice B rationale
Maintaining privacy during labor provides the client with a sense of security and control, which can reduce anxiety and stress. Reduced anxiety can modulate pain perception by decreasing the release of stress hormones, allowing the client to focus on coping mechanisms and relaxation techniques.
Choice C rationale
Effective communication involves clear, empathetic, and supportive dialogue. This fosters trust and provides reassurance, which can significantly lower a client's anxiety levels. Reduced anxiety decreases sympathetic nervous system activation, thereby diminishing the physiological perception of pain and enhancing coping abilities.
Choice D rationale
Continuity of care, where the client interacts with familiar caregivers, builds rapport and trust. This consistent support reduces anxiety and allows the client to feel more comfortable and secure. Lower stress levels minimize the release of pain-potentiating neurochemicals, thereby decreasing the subjective experience of pain during labor.
Choice E rationale
Making choices for the client removes their autonomy and can increase feelings of helplessness and anxiety. This can heighten the perception of pain by activating the sympathetic nervous system and stress responses, counteracting efforts to create a supportive and pain-reducing environment during labor.
Correct Answer is D
Explanation
Choice A rationale
This statement is incorrect as caloric needs increase during pregnancy to support fetal growth, placental development, and increased maternal metabolic demands. Inadequate caloric intake can lead to poor fetal outcomes, including low birth weight and impaired development.
Choice B rationale
While caloric needs do increase, an additional 500 calories is generally too high for the average pregnancy. The recommended increase is typically lower, focusing on nutrient-dense foods to ensure sufficient energy for both mother and fetus.
Choice C rationale
Doubling caloric intake is excessive and can lead to excessive maternal weight gain, increasing risks for gestational diabetes, preeclampsia, and delivery complications. The concept of "eating for two" is a common misconception that often leads to overconsumption.
Choice D rationale
During the second and third trimesters, the average pregnant woman requires an additional 300 calories per day above her pre-pregnancy needs. This increase provides adequate energy for rapid fetal growth, development, and maternal physiological changes, such as increased blood volume and uterine expansion.
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