The nurse is reading the results of non-stress test (NST) strips completed that day. Which of the following strips meets the criteria for a reactive NST? Select one:
A fetal heart rate baseline of 140 with one acceleration to 155 for 15 seconds within 30 minutes.
A fetal heart rate baseline of 140 with two accelerations to 160 for 15 seconds within 20 minutes.
A fetal heart rate baseline of 130 with two accelerations to 135 for 15 seconds within 20 minutes.
A fetal heart rate baseline of 150 with two accelerations to 160 for 10 seconds within 20 minutes.
The Correct Answer is B
Choice A Reason: A fetal heart rate baseline of 140 with one acceleration to 155 for 15 seconds within 30 minutes. This is an incorrect answer that indicates a non-reactive NST, which is a test that does not meet the criteria for a reactive NST. A non-reactive NST may suggest fetal hypoxia, distress, or sleep, but it does not necessarily indicate a problem. A non-reactive NST may require further testing or stimulation to elicit a reactive result.
Choice B Reason A fetal heart rate baseline of 140 with two accelerations to 160 for 15 seconds within 20 minutes. This is because this strip meets the criteria for a reactive NST, which is a non-invasive test that evaluates fetal well- being and oxygenation by measuring the fetal heart rate response to fetal movements. A reactive NST is defined as having at least two accelerations of the fetal heart rate that are at least 15 beats per minute above the baseline and last for at least 15 seconds within a 20-minute period.
Choice C Reason: A fetal heart rate baseline of 130 with two accelerations to 135 for 15 seconds within 20 minutes. This is an incorrect answer that indicates a non-reactive NST, which is a test that does not meet the criteria for a reactive NST. The accelerations in this strip are not sufficient in amplitude, as they are only 5 beats per minute above the baseline, instead of at least 15 beats per minute.
Choice D Reason: A fetal heart rate baseline of 150 with two accelerations to 160 for 10 seconds within 20 minutes. This is an incorrect answer that indicates a non-reactive NST, which is a test that does not meet the criteria for a reactive NST. The accelerations in this strip are not sufficient in duration, as they last only for 10 seconds, instead of at least 15 seconds.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Reason: Partial placenta previa is a condition where the placenta partially covers the cervix. It usually does not resolve and may cause bleeding and complications during labor and delivery.
Choice B Reason: Complete placenta previa is a condition where the placenta completely covers the cervix. It is a serious condition that requires cesarean delivery and may cause life-threatening hemorrhage.
Choice C Reason: Marginal placenta previa is a condition where the edge of the placenta reaches the margin of the cervix. It may also cause bleeding and complications during labor and delivery.
Choice D Reason: Low-lying placenta previa is a condition where the placenta is near the cervix, but not covering it. It may resolve spontaneously as the uterus grows and the placenta moves upward.

Correct Answer is B
Explanation
Choice A Reason: "If I try to talk to my partner during a contraction, I can't." This is an incorrect answer that indicates a sign of true labor, not false labor. True labor is a condition where there are regular and painful uterine contractions that cause cervical dilation and effacement, and lead to delivery of the baby and placenta. True labor contractions are usually strong and consistent, and they tend to increase or persist with activity or position changes. True labor contractions can be so intense that they interfere with speech or breathing.
Choice B Reason: ) "My contractions slow down when I walk around." This is because this statement by the client would lead the nurse to suspect that the woman is experiencing false labor, which is also known as Braxton Hicks contractions or practice contractions. False labor is a condition where there are irregular and painless uterine contractions that do not cause cervical dilation or effacement. False labor can occur throughout pregnancy, but it becomes more noticeable and frequent in late pregnancy. False labor contractions are usually weak and inconsistent, and they tend to decrease or stop with activity or position changes.
Choice C Reason: "I feel contractions start mostly in my back and they sweep around to the top of my abdomen." This is an incorrect answer that indicates a sign of true labor, not false labor. True labor contractions usually start in the lower back and radiate to the lower abdomen or groin, following a wave-like patern. False labor contractions are more likely to be felt in the upper abdomen or sides, without a clear patern.
Choice D Reason: "My contractions are about 6 minutes apart and regular." This is an incorrect answer that indicates a sign of true labor, not false labor. True labor contractions usually have a regular frequency and duration, and they become closer and longer as labor progresses. False labor contractions are more likely to have an irregular frequency and duration, and they do not change significantly over time.
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