A nurse is caring for a client who is coming in for her first prenatal visit and it is estimated to be 9 weeks gestation.
An ultrasound is scheduled.
The nurse should explain to the client that the ultrasound is being done today to assess for which of the following?
Chromosomal defect.
Fetal lung maturity.
Fetal heartbeat.
Fetal position in utero.
The Correct Answer is C
Choice A rationale
Chromosomal defects are typically assessed using different tests, such as chorionic villus sampling or amniocentesis, rather than an ultrasound at this early stage.
Choice B rationale
Fetal lung maturity cannot be assessed at 9 weeks gestation because the lungs are not yet developed. This assessment is usually done later in pregnancy if preterm delivery is anticipated.
Choice C rationale
At 9 weeks gestation, the primary purpose of an ultrasound is to confirm the presence of a fetal heartbeat, which indicates a viable pregnancy.
Choice D rationale
The position of the fetus in utero is not a concern at this early stage of pregnancy. Fetal positioning becomes relevant later in pregnancy, closer to delivery.
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Correct Answer is D
Explanation
Choice A rationale
Calling the healthcare provider delays immediate intervention needed to alleviate the client's symptoms of dizziness and nausea due to supine hypotensive syndrome. Quick repositioning is crucial to improve venous return and alleviate the symptoms.
Choice B rationale
Elevating the head of the bed will not relieve the pressure on the inferior vena cava caused by the supine position. This intervention does not address the underlying cause of the client's symptoms.
Choice C rationale
Encouraging deep breathing is unlikely to resolve the symptoms of supine hypotensive syndrome, which is caused by the compression of the vena cava by the gravid uterus when lying supine. This intervention does not address the physiological cause.
Choice D rationale
Turning her to her side relieves the pressure on the inferior vena cava, improving venous return and increasing blood pressure. This is the correct initial action to address the symptoms of supine hypotensive syndrome.
Correct Answer is C
Explanation
Choice A rationale
Fetal nutrition and excretion are carried out by the placenta. This statement is correct. The placenta provides essential nutrients to the fetus and removes waste products from fetal blood.
Choice B rationale
Fetal respirations are carried out by the placenta. This statement is correct. The placenta facilitates gas exchange, providing oxygen to the fetus and removing carbon dioxide.
Choice C rationale
The placenta filters harmful substances from maternal blood. This statement is incorrect. While the placenta provides some barrier function, it does not filter all harmful substances from maternal blood, and certain drugs and toxins can cross the placental barrier and affect the fetus.
Choice D rationale
The placenta receives maternal blood from the uterine arteries. This statement is correct. Maternal blood flows to the placenta via the uterine arteries, supplying oxygen and nutrients to the fetal side of the placenta.
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