A nurse is teaching a pregnant client about the purpose and procedure of a nonstress test (NST).
Which of the following statements by the client indicates a need for further teaching?
“The test will measure how my baby’s heart rate changes when he moves.”
“The test will take at least 20 minutes, but it may take longer.”
“The test will involve placing two belts around my abdomen.”
“The test will require me to lie on my back for the duration of the test.”
The Correct Answer is D
The test will require me to lie on my back for the duration of the test. This statement indicates a need for further teaching because lying on the back can compress the inferior vena cava and reduce blood flow to the baby. The test can be done in a reclining chair or on an exam table with a wedge under one hip to avoid this problem.
Choice A is correct because the test will measure how the baby’s heart rate changes when he moves. In most healthy babies, the heart rate increases during movement.
Choice B is correct because the test will take at least 20 minutes, but it may take longer if the baby is not active or moving during that time period.
Choice C is correct because the test will involve placing two belts around the abdomen. One will measure the baby’s heartbeat and the other will record contractions.
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Correct Answer is D
Explanation
The test will require me to lie on my back for the duration of the test.This statement indicates a need for further teaching because lying on the back can compress the inferior vena cava and reduce blood flow to the baby.The test can be done in a reclining chair or on an exam table with a wedge under one hip to avoid this problem.
Choice A is correct because the test will measure how the baby’s heart rate changes when he moves.In most healthy babies, the heart rate increases during movement.
Choice B is correct because the test will take at least 20 minutes, but it may take longer if the baby is not active or moving during that time period.
Choice C is correct because the test will involve placing two belts around the abdomen.One will measure the baby’s heartbeat and the other will record contractions.
Correct Answer is A
Explanation
The NST is reactive, indicating fetal well-being.A reactive NST means that the fetal heart rate increases by at least15 bpmfor at least15 secondstwice or more in a20-minuteperiod.This shows that the fetus is healthy and getting enough oxygen.
Choice B is wrong because a nonreactive NST means that the fetal heart rate does not show the expected accelerations in a 40-minute period, which may indicate fetal compromise.
Choice C is wrong because an inconclusive NST means that the test results are unclear or not enough data was collected, which may require further testing.
Choice D is wrong because an invalid NST means that the test was not performed correctly or there was interference with the fetal heart rate monitoring, which may require a repeat test.
Normal ranges for fetal heart rate are110 to 160 bpmwith moderate variability (5 to 25 bpm) and no decelerations.
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