What is the primary purpose of using terbutaline in labor for intrauterine resuscitation?
To stimulate uterine contractions
To improve placental blood flow
To decrease fetal heart rate variability
To prevent preterm labor
The Correct Answer is B
A. To stimulate uterine contractions: Terbutaline is a tocolytic (a medication that relaxes the uterus), not a uterotonic. It is not used to stimulate contractions.
B. To improve placental blood flow: Terbutaline relaxes uterine muscles, decreasing contraction frequency and intensity, thereby improving placental blood flow. It is often used in intrauterine resuscitation when there is uteroplacental insufficiency and fetal distress due to excessive contractions (tachysystole).
C. To decrease fetal heart rate variability: Terbutaline does not directly affect fetal heart rate variability. It is used to reduce uterine contractions, which can secondarily improve fetal oxygenation.
D. To prevent preterm labor: While terbutaline can be used to delay preterm labor, in this context, it is being used for intrauterine resuscitation, not for preventing labor.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Pyelonephritis in pregnancy does not pose any risks to the fetus. Pyelonephritis can lead to complications such as preterm labor, low birth weight, and maternal sepsis, making this statement incorrect.
B. Untreated pyelonephritis in pregnancy can increase the risk of preterm labor and low birth weight. Pyelonephritis can cause systemic inflammation, leading to complications such as preterm labor and fetal growth restriction. Prompt treatment is necessary to reduce these risks.
C. Pyelonephritis is a common condition during pregnancy. While urinary tract infections (UTIs) are common in pregnancy, pyelonephritis (kidney infection) is less frequent but more serious.
D. Pyelonephritis is a mild infection that does not require treatment. Pyelonephritis is a serious condition that requires immediate antibiotic therapy to prevent maternal and fetal complications.
Correct Answer is C
Explanation
A. Maternal bradycardia: Late decelerations are caused by uteroplacental insufficiency, not maternal heart rate changes.
B. Fetal head compression: Fetal head compression causes early decelerations, which are benign and mirror contractions. Late decelerations occur after contractions and indicate a more serious issue.
C. Uteroplacental insufficiency: Late decelerations occur due to decreased oxygenation from poor placental perfusion (uteroplacental insufficiency). Common causes include maternal hypotension, post-term pregnancy, uterine tachysystole, and placental abruption.
D. Umbilical cord compression: Umbilical cord compression causes variable decelerations, not late decelerations.
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