A nurse is reviewing the medical records of four clients who have an acid-base imbalance. The nurse should recognize that which of the following clients is at risk for respiratory alkalosis?
A client who is taking a thiazide diuretic.
A client who is vomiting.
A client who has salicylate intoxication.
A client who has hypoventilation.
None
None
The Correct Answer is C
The correct answer is Choice C.
Choice A rationale: Thiazide diuretics cause potassium and chloride loss, leading to metabolic alkalosis, not respiratory alkalosis. Hypokalemia decreases hydrogen ion excretion, increasing bicarbonate levels. Metabolic alkalosis is characterized by pH >7.45 and HCO₃⁻ >26 mEq/L rather than decreased PaCO₂.
Choice B rationale: Vomiting leads to metabolic alkalosis due to gastric acid loss. Hydrogen ion depletion increases bicarbonate concentration, shifting pH above normal. Arterial blood gases typically show increased HCO₃⁻ (>26 mEq/L) with a compensatory increase in PaCO₂ (>45 mmHg), not respiratory alkalosis.
Choice C rationale: Salicylate intoxication initially induces hyperventilation, reducing PaCO₂ levels below 35 mmHg and increasing pH above 7.45, leading to respiratory alkalosis. As toxicity progresses, metabolic acidosis may develop due to lactic acid accumulation, but early stages primarily present with respiratory alkalosis.
Choice D rationale: Hypoventilation leads to CO₂ retention, increasing PaCO₂ above 45 mmHg, forming carbonic acid (H₂CO₃) and causing respiratory acidosis. Blood gases show pH <7.35 with elevated PaCO₂, not respiratory alkalosis, which is caused by excessive CO₂ elimination through hyperventilation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The correct answer is c. Cleanse the newborn immediately after delivery. This is because cleansing the newborn can reduce the risk of HIV transmission through exposure to maternal blood or fluids. The other options are not appropriate for the following reasons:
a. Administer IV antibiotics to the newborn. This is not necessary unless the newborn has signs of infection or sepsis. Antibiotics do not prevent or treat HIV infection.
b. Encourage the mother to breastfeed her newborn. This is contraindicated for mothers with HIV, as breastfeeding can transmit the virus to the infant. Mothers with HIV should avoid breastfeeding and use formula or donor milk instead.
d. Initiate contact precautions for the newborn. This is not required for newborns exposed to HIV, as HIV is not transmitted by casual contact. Standard precautions are sufficient to prevent the spread of HIV and other bloodborne pathogens.
Correct Answer is D
Explanation
Choice A rationale:
Fresh citrus fruits are not a good source of vitamin B12. They are rich in vitamin C but do not contain vitamin B12.
Choice B rationale:
Brown rice is not a good source of vitamin B12. While it is a nutritious grain, it does not contain vitamin B12.
Choice C rationale:
Raw carrots are not a good source of vitamin B12. Carrots provide essential nutrients but do not contain vitamin B12.
Choice D rationale:
Fortified soy milk is the correct choice as it is a suitable option for someone on a vegan diet looking to increase their vitamin B12 intake. Many brands of soy milk are fortified with vitamin B12, making it a reliable source for vegans. Vitamin B12 is essential for nerve function and red blood cell production, making it especially important during pregnancy.
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