The nurse is reviewing fetal circulation with a pregnant patient and explains that blood circulates through the placenta to the fetus. What is the function of ductus arteriosus?
Select one:
Lungs bypass
Brain bypass
Liver bypass
Cardiac bypass
The Correct Answer is A
a. The function of the ductus arteriosus is to bypass the lungs in fetal circulation, allowing oxygenated blood from the placenta to be shunted directly to systemic circulation.
b. Ductus arteriosus does not bypass the brain; it specifically bypasses the lungs.
c. Ductus venosus shunts blood away from the liver, not the ductus arteriosus.
d. Ductus arteriosus shunts blood away from the lungs, not the heart itself.
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Related Questions
Correct Answer is C
Explanation
a. Thin, white, and compact cervical mucus is not a typical characteristic of the cervical mucus before ovulation.
b. Cloudy, compact, and tacky cervical mucus is not a typical characteristic of the cervical mucus before ovulation.
c. Thin, watery, and slippery cervical mucus is a typical characteristic of the cervical mucus before ovulation, as it facilitates sperm movement and fertilization.
d. Scant, compact, and thick cervical mucus is not a typical characteristic of the cervical mucus before ovulation.
Correct Answer is B
Explanation
a. This is not the correct choice because the woman has signs of magnesium toxicity, such as low urine output, high blood pressure, and increased DTR. Continuing the infusion could worsen her condition and put her and the fetus at risk.
b. This is the correct choice because the woman needs to be treated for magnesium toxicity, which is a serious complication of preeclampsia. Stopping the infusion will prevent further accumulation of magnesium in her body and allow her to excrete the excess.
c. This is not the correct choice because it will delay the treatment of magnesium toxicity, which is a medical emergency. The woman's vital signs and symptoms are enough to indicate that she has a high level of magnesium and needs immediate intervention.
d. This is not the correct choice because it will not address the underlying cause of magnesium toxicity, which is the infusion. Oxygen may help with some symptoms, such as respiratory depression, but it will not reverse the effects of magnesium on the nervous system and blood vessels.
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