Which of the following are contraindications for VBAC? (Select All that Apply.).
A prior vaginal delivery.
Gestation of 42 weeks.
Maternal obesity.
One prior cesarean delivery.
Macrosomic fetus.
Correct Answer : C,E
Choice A reason:
A prior vaginal delivery is not a contraindication for VBAC. In fact, it is a positive predictor of success for VBAC, as it indicates that the woman has a proven pelvis and can tolerate labor.
Choice B reason:
The gestation of 42 weeks is not a contraindication for VBAC. However, it is associated with an increased risk of stillbirth while awaiting spontaneous labor, which should be balanced against the risks of induction of labor or elective repeat cesarean.
Choice C reason:
Maternal obesity is a relative contraindication for VBAC. It is associated with a lower success rate of VBAC, a higher risk of uterine rupture, and a higher risk of maternal and neonatal complications. The decision to attempt VBAC in obese women should be made on a case-by-case basis by a senior obstetrician.
Choice D reason:
One prior cesarean delivery is not a contraindication for VBAC. Most women who have had one prior lower segment cesarean delivery are eligible for VBAC, as the risk of uterine rupture is low (0.5%) and the success rate is high (72-75%).
Choice E reason:
A macrosomic fetus is a relative contraindication for VBAC. It is associated with a lower success rate of VBAC, a higher risk of uterine rupture, and a higher risk of shoulder dystocia and birth trauma. The decision to attempt VBAC in women with suspected macrosomia should be made on a case-by-case basis by a senior obstetrician.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A:
Two arteries and two veins. This is incorrect because the umbilical cord normally has only three blood vessels: one vein and two arteries. Having four blood vessels is a rare anomaly that can be associated with congenital defects. •
Choice B:
Two veins and one artery. This is incorrect because the umbilical cord normally has only one vein and two arteries. Having two veins and one artery is another rare anomaly that can also be associated with congenital defects. •
Choice C:
One artery and one vein. This is incorrect because the umbilical cord normally has two arteries and one vein. Having only one artery and one vein is a common anomaly that occurs in about 1% of singleton pregnancies and 5% of twin pregnancies. It can be associated with intrauterine growth restriction, congenital anomalies, and perinatal mortality. •
Choice D:
Two arteries and one vein. This is correct because the umbilical cord normally has two arteries and one vein. The vein carries oxygenated blood from the placenta to the fetus, while the arteries carry deoxygenated blood from the fetus to the placenta. The umbilical cord also contains Wharton's jelly, which is a gelatinous substance that protects the blood vessels from compression.
Correct Answer is B
Explanation
Choice A reason:
Using illicit drugs is not a known cause of congenital hip dysplasia. Illicit drugs may have other harmful effects on the baby, but they do not affect the formation of the hip joint.
Choice B reason:
Unknown. The exact cause of congenital hip dysplasia is not clear. Both genetic and environmental factors seem to play a role in the development of the disorder. Some risk factors include being female, firstborn, breech position, family history, and tight swaddling.
Choice C reason:
Being in nursing school is not a cause of congenital hip dysplasia. This is an irrelevant and incorrect choice.
Choice D reason:
Drinking too much is not a cause of congenital hip dysplasia. Alcohol consumption during pregnancy may increase the risk of fetal alcohol syndrome and other complications, but it does not affect the formation of the hip joint.
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