A 35-weeks-pregnant client is undergoing a nonstress test (NST). During the 20-minute examination, the nurse notes three fetal movements accompanied by accelerations of the fetal heart rate, each 15 bpm, lasting 15 seconds. The nurse interprets this test to be?

1. A

   Nonreactive

2. B

   Reactive

3. C

   Positive

4. D

   Negative

Appeared in: NORCET 5 mains

Explanation

Listen in Hindi

• A reactive Nonstress Test (NST) is a reassuring sign of fetal well-being, indicating the fetus is well-oxygenated and not suffering from hypoxia or acidosis.
• For a fetus at 35 weeks' gestation (i.e., at or beyond 32 weeks), the definition of a reactive NST is the presence of two or more fetal heart rate accelerations that peak at 15 bpm or more above baseline and last for 15 seconds or more, all occurring within a 20-minute window.
• The scenario describes three fetal movements accompanied by accelerations that meet these criteria (15 bpm for 15 seconds), thus fulfilling the requirements for a reactive NST.

Why Other Options Were Wrong

• Option A: A nonreactive NST is defined as having fewer than two qualifying accelerations over a 40-minute period. The findings in the question (three accelerations in 20 minutes) exceed the criteria for a reactive test.
• Option C: The term 'Positive' is not used for interpreting a Nonstress Test. It is used for a Contraction Stress Test (CST).
• Option D: The term 'Negative' is not used for interpreting a Nonstress Test. It is used for a Contraction Stress Test (CST).

Related Visual

• Visual 1: Fetal Heart Rate Tracing - An example of a reactive NST, showing a stable baseline FHR with at least two accelerations that meet the 15x15 criteria within a 20-minute window.
• Visual 2: Fetal Heart Rate Tracing - An example of a nonreactive NST, showing a flat tracing with a lack of sufficient accelerations over a 40-minute period.

Clinical Relevance

• Nursing practice connection: Use the key finding related to Interpretation of Nonstress Test (NST) results in antepartum fetal surveillance to guide bedside assessment, documentation, and the next nursing action.
• A reactive NST is a reassuring indicator of fetal health and typically requires no immediate intervention, other than continuing routine antepartum care as indicated for the pregnancy.
• A nonreactive NST is a non-reassuring finding that warrants further evaluation of fetal well-being. The next step is often a biophysical profile (BPP) or a contraction stress test (CST).
• What if? If the client were at 30 weeks gestation, the criteria for reactivity would be different: at least two accelerations of 10 bpm or more, lasting 10 seconds or more (the '10x10 rule'). Given the findings of 15 bpm for 15 seconds, the test would still be considered reactive.

How to Approach the Question

• First, identify the clinical test being performed, which is a Nonstress Test (NST).
• Next, extract the key data from the scenario: the client's gestational age (35 weeks) and the specific findings of the test (three FHR accelerations, each 15 bpm for 15 seconds, in a 20-minute period).
• Recall the standard criteria for interpreting an NST. Remember that the primary interpretations are 'Reactive' or 'Nonreactive'.
• Apply the correct criteria based on gestational age. For a fetus at or beyond 32 weeks, the '15x15 rule' is used: at least two accelerations of ≥15 bpm for ≥15 seconds in 20 minutes.
• Compare the scenario's findings to the criteria. The finding of three such accelerations clearly meets the definition of a 'Reactive' test.
• Eliminate the incorrect options. 'Nonreactive' is incorrect because the criteria were met. 'Positive' and 'Negative' are incorrect because they are used for a different test, the Contraction Stress Test (CST).

Concept Tested & Keywords

• Concept Tested: Interpretation of Nonstress Test (NST) results in antepartum fetal surveillance.
• Stem keywords: nonstress test, NST, 35-weeks-pregnant, fetal movements, accelerations, fetal heart rate
• Lead-in keywords: interprets this test to be
• Clinical cues: Gestational age of 35 weeks determines the criteria for reactivity (15x15 rule).
• Clinical cues: Three accelerations in 20 minutes exceeds the minimum requirement of two.

Question ID

QHSVuekpgZl2-Gsy4Zr6SP

Copy ID