A nurse is educating a pregnant client about the Non-Stress Test (NST).
Which statement by the client indicates understanding of the test?
"NST is performed after 28 weeks of gestation or earlier if there are risk factors.".
"A nonreactive NST means that the fetal heart rate increases by at least 15 beats per minute for at least 15 seconds twice or more in a 20-minute period.".
. "NST requires placing two belts with sensors on my abdomen: one to monitor the fetal heart rate and one to monitor the uterine contractions.".
"A reactive NST may indicate fetal hypoxia, distress, sleep, medication effect, or neurological abnormality.".
The Correct Answer is A
"NST is performed after 28 weeks of gestation or earlier if there are risk factors."12 This statement indicates that the client understands when and why an NST is done.
Choice B is wrong because it describes a reactive NST, not a nonreactive one.
A reactive NST means that the fetal heart rate increases by at least 15 beats per minute for at least 15 seconds twice or more in a 20-minute period.2
Choice C is wrong because it confuses NST with contraction stress test (CST), which requires monitoring uterine contractions.
NST does not involve contractions.2
Choice D is wrong because it describes possible causes of a nonreactive NST, not a reactive one.
A nonreactive NST may indicate fetal hypoxia, distress, sleep, medication effect, or neurological abnormality.2
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
An NST is a test that measures the fetal heart rate in response to fetal movement.
It is a non-invasive and simple way to assess fetal well-being.
An NST may be recommended to further evaluate fetal well-being if the CST result is equivocal, meaning that occasional but not persistent late decelerations are present.
Choice B. Amniocentesis is wrong because it is an invasive procedure that involves inserting a needle into the uterus to collect amniotic fluid for genetic testing or fetal lung maturity.
It is not used to evaluate fetal well-being in response to contractions.
Choice C. Magnetic resonance imaging (MRI) is wrong because it is an imaging technique that uses magnetic fields to create detailed pictures of the fetus and the placenta.
It is not used to evaluate fetal well-being in response to contractions.
Choice D. Chorionic villus sampling (CVS) is wrong because it is an invasive procedure that involves inserting a catheter or a needle into the placenta to collect chorionic villi for genetic testing.
It is not used to evaluate fetal well-being in response to contractions.
Normal ranges for CST are negative (normal) or positive (abnormal).
Equivocal and unsatisfactory are special categories of test outcomes that require further testing.
Normal ranges for NST are reactive (reassuring) ornon-reactive (non-reassuring).
Correct Answer is A
Explanation
“I will have sensors placed on my abdomen to monitor the FHR and uterine contractions.” This statement indicates the client understands the test procedure of a CST, which is a test that triggers contractions and registers how the baby’s heart reacts.
The test is done by placing two sensor belts around the abdomen, one to measure the baby’s heartbeat and the other to measure contractions.
The client may receive oxytocin through an IV to induce contractions.
Choice B is wrong because the client does not need to fast for 24 hours before the test.
There is no evidence that fasting is required for a CST.
Choice C is wrong because the client will not be sedated during the test.
Sedation is not necessary for a CST and may interfere with the results.
Choice D is wrong because the client does not need to drink plenty of fluids before the test.
There is no evidence that drinking fluids is required for a CST.
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