What is considered a reactive nonstress test (NST)?
A decrease in fetal heart rate during monitoring
The presence of at least two fetal heart rate accelerations during 20 minutes of monitoring
A rise in fetal heart rate of at least 15/min from baseline lasting for at least 15 seconds
The absence of fetal heart rate accelerations during monitoring
The Correct Answer is B
A. A decrease in fetal heart rate during monitoring: A decrease in fetal heart rate (deceleration) is not a reassuring sign and suggests fetal distress, which is not considered reactive.
B. The presence of at least two fetal heart rate accelerations during 20 minutes of monitoring: A reactive NST is defined as at least two fetal heart rate accelerations of 15 beats per minute lasting at least 15 seconds within a 20-minute period, indicating fetal well-being.
C. A rise in fetal heart rate of at least 15/min from baseline lasting for at least 15 seconds: While this is part of the criteria for determining accelerations, the key aspect of a reactive NST is the presence of at least two such accelerations within a 20-minute period.
D. The absence of fetal heart rate accelerations during monitoring: The absence of accelerations in a 40-minute period is classified as a nonreactive NST, which may indicate fetal hypoxia or other concerns requiring further evaluation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Variable decelerations are due to umbilical cord compression. Variable decelerations are characterized by abrupt decreases in FHR, often with a "V" or "U" shape. They are caused by umbilical cord compression, which disrupts fetal oxygenation.
B. Variable decelerations are a result of the administration of IV narcotic analgesics. Narcotic analgesics (e.g., morphine, fentanyl) cause decreased FHR variability and prolonged decelerations, not variable decelerations.
C. Variable decelerations are caused by uteroplacental insufficiency. Uteroplacental insufficiency causes late decelerations, not variable decelerations.
D. Variable decelerations are related to fetal head compression. Fetal head compression causes early decelerations, which are gradual and mirror contractions, unlike variable decelerations.
Correct Answer is B
Explanation
A. Repaglinide: Repaglinide is an oral hypoglycemic agent, but it is not recommended in pregnancy due to limited safety data.
B. Insulin: Insulin is the preferred treatment for gestational diabetes mellitus (GDM) when diet and exercise are insufficient. It does not cross the placenta and is safe for both the mother and fetus.
C. Glipizide: Glipizide is an oral sulfonylurea that crosses the placenta and may cause neonatal hypoglycemia. It is not recommended for GDM.
D. Acarbose: Acarbose is not commonly used in pregnancy due to limited safety data and concerns about gastrointestinal side effects.
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