In a newborn infant, which of the following is the liver's job related to bilirubin?
Changing conjugated bilirubin to unconjugated.
Synthesis of vitamin K.
Changing unconjugated bilirubin to conjugated bilirubin.
Removal of meconium.
The Correct Answer is C
Choice A rationale:
The liver's job related to bilirubin is not changing conjugated bilirubin to unconjugated. Conjugated bilirubin is the water-soluble form of bilirubin that is excreted in bile and urine. Unconjugated bilirubin, on the other hand, is the fat-soluble form, which is transported to the liver and conjugated to become water-soluble. The conversion goes from unconjugated to conjugated, not the other way around.
Choice B rationale:
The liver's job related to bilirubin is not the synthesis of vitamin K. The liver is responsible for synthesizing clotting factors, including factors II (prothrombin), VII, IX, and X, but not vitamin K itself. Vitamin K is obtained from dietary sources or supplements and is essential for blood clotting.
Choice C rationale:
This choice is the correct answer. The liver's primary function related to bilirubin is changing unconjugated bilirubin to conjugated bilirubin. As mentioned earlier, unconjugated bilirubin is produced from the breakdown of heme in old red blood cells, and it needs to be processed in the liver to become water-soluble and eventually excreted in bile and urine.
Choice D rationale:
The liver's job related to bilirubin does not involve the removal of meconium. Meconium is the first stool passed by a newborn, and its elimination is unrelated to the liver's function in processing bilirubin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Notifying the provider immediately may be an appropriate action in certain urgent situations. However, for a newborn who has not voided for the first time yet, it is not an immediate emergency. The priority is to assess the newborn's condition further before notifying the provider.
Choice B rationale:
Pressing on the bladder to prevent urine retention is not a recommended action. Applying pressure on the newborn's bladder can be harmful and is not a standard nursing practice.
Choice C rationale:
Administering IV fluid is not the priority action for a newborn who has not voided. Newborns usually receive sufficient hydration from breastfeeding or formula feeding, and administering IV fluid without proper indication can lead to potential complications.
Choice D rationale:
Documenting and continuing monitoring is the correct priority action in this situation. Newborns often take some time to pass their first urine, and it is considered normal for them to have delayed voiding within the first 24 hours after birth. The nurse should document the absence of voiding and monitor the newborn for any signs of distress or abnormalities. If the newborn's condition worsens or if there are other concerning symptoms, then notifying the provider may be necessary.
Correct Answer is B
Explanation
A. Maintaining ambient room temperature at 24° C (75° F) can help prevent heat loss by keeping the environment warm, but it does not specifically address evaporative heat loss. Evaporative heat loss occurs when moisture on the skin evaporates, which is not directly controlled by ambient temperature.
B. Drying the newborn's skin thoroughly reduces evaporative heat loss by removing moisture that can evaporate and cool the skin. This action is critical immediately after birth when the newborn is wet with amniotic fluid.
C. Preventing air drafts helps reduce convective heat loss, not evaporative heat loss. Convective heat loss occurs when air moves across the skin and carries heat away.
D. Placing the newborn on a warm surface helps reduce conductive heat loss by preventing heat transfer from the baby to a cooler surface. However, this does not address evaporative heat loss, which is specifically related to moisture evaporation from the skin.
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