A nurse is performing a nonstress test (NST) on a client who is at 36 weeks of gestation and asks "what are you looking for during this test?" Which of the following responses should the nurse make?
"We are looking for increases in fetal heart rate of 15 beats per minute for at least 15 seconds.
"We will draw blood to evaluate the baby's risk of genetic problems.”.
"If the baby moves 5 times in 15 minutes, then the baby is healthy.”.
"I am looking at the ultrasound to see if the baby has any congenital anomalies.”.
The Correct Answer is A
Choice A rationale
A reactive nonstress test demonstrates at least two accelerations in fetal heart rate, defined as an increase of 15 beats per minute above the baseline lasting for 15 seconds, within a 20-minute period. These accelerations indicate adequate fetal oxygenation and a healthy fetal autonomic nervous system response to movement.
Choice B rationale
Drawing blood to evaluate the baby's risk of genetic problems is typically performed through procedures like amniocentesis or chorionic villus sampling, not during a nonstress test. A nonstress test assesses fetal well-being based on heart rate patterns in response to fetal movement.
Choice C rationale
While fetal movement is an indicator of fetal well-being, the nonstress test specifically evaluates the fetal heart rate response to that movement. The number of movements within a specific time frame is a component of a biophysical profile, not the sole indicator in a nonstress test.
Choice D rationale
Ultrasound is used to visualize fetal anatomy and assess for congenital anomalies, which is a component of a fetal anatomy scan typically performed around 18-20 weeks of gestation. A nonstress test primarily monitors fetal heart rate and its reactivity.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
A reactive non-stress test indicates fetal well-being. The criteria for a reactive NST in a fetus greater than 32 weeks gestation include two or more fetal heart rate accelerations of at least 15 beats per minute above the baseline lasting for at least 15 seconds within a 20-minute period. The baseline fetal heart rate should be within the normal range of 110 to 160 beats per minute. This client's results meet these criteria.
Choice B rationale
A non-reactive non-stress test lacks the required number of fetal heart rate accelerations or the accelerations do not meet the amplitude or duration criteria within the specified time frame. This suggests the fetus may be experiencing some form of stress and requires further evaluation.
Choice C rationale
A negative non-stress test is not a standard term used to describe NST results. The test is categorized as either reactive (indicating fetal well-being) or non-reactive (suggesting potential fetal compromise).
Choice D rationale
A positive non-stress test is also not a standard term used for NST interpretation. A positive result in fetal monitoring typically refers to a contraction stress test where late decelerations are observed, indicating potential uteroplacental insufficiency.
Correct Answer is D
Explanation
Choice A rationale
Assessing the patient's urine for protein and glucose is relevant for evaluating potential preeclampsia or gestational diabetes, but it does not directly address the immediate concern of decreased fetal movement. While these conditions can indirectly affect fetal well-being, the priority is to assess fetal status directly.
Choice B rationale
Preparing the patient for an abdominal ultrasound can provide information about fetal well-being and amniotic fluid volume, but it is not the immediate first-line intervention for a concerning decrease in fetal kick counts. Further assessment is needed before resorting to diagnostic procedures.
Choice C rationale
A kick count of 32 movements in 4 hours is below the generally accepted normal range. While definitions vary slightly, many healthcare providers consider fewer than 10 movements in 2 hours or a significant decrease from the patient's baseline to be concerning and warrant further investigation. Reassuring the patient without further assessment would be inappropriate.
Choice D rationale
A decrease in fetal movement can be a sign of fetal distress and requires prompt evaluation by a healthcare provider. Notifying the physician or midwife is the correct priority nursing intervention to initiate further assessment of fetal well-being, which may include a non-stress test (NST) or biophysical profile (BPP).
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