Nokea
A pregnant woman in her first trimester is considering prenatal testing. The nurse is providing patient education regarding prenatal testing in the first trimester. What statement accurately reflects the nurse’s education?
- A. Prenatal testing in the first trimester primarily focuses on determining the gender of the fetus.
- B. Prenatal testing in the first trimester helps assess the risk of abnormalities in the fetus.
- C. Prenatal testing in the first trimester monitors the growth and development of the placenta.
- D. Prenatal testing in the first trimester is primarily performed to detect potential maternal infections.
Correct Answer: B
Rationale: Prenatal testing in the first trimester focuses on assessing the risk of fetal abnormalities, not gender, placenta, or infections.
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The nurse is explaining fetal circulation to a student. Which statement by the nurse is correct?
- A. There is an opening between the atria that allows blood to flow directly to the lungs for oxygenation.
- B. There is a shunt between the aorta and the pulmonary vein that bypasses the lungs.
- C. The ductus arteriosus allows blood to flow from the pulmonary artery to the aorta.
- D. The foramen ovale closes just before birth.
Correct Answer: C
Rationale: The ductus arteriosus allows blood to bypass the lungs, directing it from the pulmonary artery to the aorta.
A patient at 34 weeks gestation is undergoing an ultrasound. The nurse notes that the amniotic fluid is estimated at between 500 and 600 mL. Which deduction does the nurse make from this finding?
- A. Oligohydramnios is present.
- B. Fluid is normal for gestation age.
- C. Polyhydramnios has formed.
- D. Follow-up ultrasound is warranted.
Correct Answer: A
Rationale: Oligohydramnios, or low amniotic fluid, is indicated by the reduced volume, requiring close monitoring.
A father and mother are carriers of phenylketonuria (PKU). Their 2-year-old daughter has PKU. The couple tells the nurse that they are planning to have a second baby. Because their daughter has PKU, they are sure that their next baby won't be affected. What response by the nurse is most accurate?
- A. Good planning; you need to take advantage of the odds in your favor.
- B. I think you'd better check with your doctor first.
- C. You are both carriers, so each baby has a 25% chance of being affected.
- D. The ultrasound indicates a boy, and boys are not affected by PKU.
Correct Answer: C
Rationale: Each child produced by this couple has a 25% chance of being affected by PKU disorder.
A student nurse is learning about prenatal testing for fetal genetic disorders and neural tube defects. What prenatal tests are screening tests in the second trimester? Select all that apply.
- A. amniocentesis
- B. multiple marker
- C. cell-free DNA
- D. chorionic villus sampling (CVS)
Correct Answer: B
Rationale: Screening tests include multiple markers and alpha-fetoprotein, while amniocentesis and CVS are diagnostic.
The nurse is conducting a staff in-service on multifetal pregnancy. Which statement regarding dizygotic twin development should the nurse include in the teaching session?
- A. Dizygotic twins arise from two fertilized ova and are the same sex.
- B. Dizygotic twins arise from a single fertilized ovum and are always of the same sex.
- C. Dizygotic twins arise from two fertilized ova and may be the same sex or different sexes.
- D. Dizygotic twins arise from a single fertilized ovum and may be the same sex or different sexes.
Correct Answer: C
Rationale: Dizygotic twins, also known as fraternal twins, result from the fertilization of two separate eggs by two sperm cells. Therefore, they have different genetic makeups and can be the same sex or different sexes. This is in contrast to monozygotic twins (identical twins), who arise from a single fertilized egg that splits into two embryos, resulting in twins of the same sex and identical genetic makeup. It is important for the nurse to include this information in the staff in-service on multifetal pregnancy to ensure accuracy and understanding among the attendees.