(Select all that apply) A nurse is performing a nonstress test (NST) for a client who is at 32 weeks of gestation and has gestational diabetes mellitus.
The nurse uses vibroacoustic stimulation to elicit fetal movement and acceleration of FHR.
What are the indications for using this method?
The fetus is in a breech presentation
The fetus has not moved for 40 minutes.
The baseline FHR variability is minimal.
The client has a history of stillbirth.
The test result is nonreactive after 40 minutes.
Correct Answer : E
The test result is nonreactive after 40 minutes. Vibroacoustic stimulation (VAS) is the application of a vibratory sound stimulus to the abdomen of a pregnant woman to induce fetal heart rate (FHR) accelerations. VAS is typically used during a nonstress test (NST) to elicit fetal movement and reactivity when the baseline FHR variability is minimal or the test result is nonreactive after 40 minutes. VAS can shorten the testing time and reduce the incidence of non-reactive cardiotocography.
Choice A is wrong because the fetus’s presentation does not affect the use of VAS.
Choice B is wrong because VAS is not indicated for a fetus that has not moved for 40 minutes, unless the NST result is also nonreactive.
Choice C is wrong because minimal baseline FHR variability is not a sufficient indication for VAS, unless the NST result is also nonreactive.
Choice D is wrong because a history of stillbirth does not affect the use of VAS.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C","D"]
Explanation
The correct answer is choice A, B, C and D.These are the four components of a biophysical profile (BPP) that are scored as 2 (normal) or 0 (abnormal) based on ultrasound examination.The fifth component is the nonstress test (NST) that measures the fetal heart rate reactivity.A total score of 8 or 10 is normal, 6 is equivocal, and 4 or less is abnormal.
Choice E is wrong because fetal position is not a part of the BPP score.Fetal position is determined by ultrasound but it does not affect the score.
Normal ranges for each component are:
• Fetal breathing movement: One or more episodes of fetal breathing lasting at least 30 seconds within 30 minutes.
• Fetal tone: One or more episodes of active extension and flexion of a fetal extremity or opening and closing of the hand within 30 minutes.
• Reactive fetal heart rate: Two or more fetal heart rate accelerations that peak at least 15 beats per minute above the baseline and last at least 15 seconds from baseline to baseline during 20 minutes of observation.
• Amniotic fluid volume: A single deepest vertical pocket of amniotic fluid that measures at least 2 centimeters.
• Gross body movement: Three or more discrete body or limb movements within 30 minutes.
Correct Answer is ["E"]
Explanation
The test result is nonreactive after 40 minutes.Vibroacoustic stimulation (VAS) is the application of a vibratory sound stimulus to the abdomen of a pregnant woman to induce fetal heart rate (FHR) accelerations.VAS is typically used during a nonstress test (NST) to elicit fetal movement and reactivity when the baseline FHR variability is minimal or the test result is nonreactive after 40 minutes.VAS can shorten the testing time and reduce the incidence of non-reactive cardiotocography.
Choice A is wrong because the fetus’s presentation does not affect the use of VAS.
Choice B is wrong because VAS is not indicated for a fetus that has not moved for 40 minutes, unless the NST result is also nonreactive.
Choice C is wrong because minimal baseline FHR variability is not a sufficient indication for VAS, unless the NST result is also nonreactive.
Choice D is wrong because a history of stillbirth does not affect the use of VAS.
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