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 B
No explanation
Correct Answer is B
Explanation
Choice A rationale:
Requesting that the provider insert an intrauterine pressure catheter is not the immediate action the nurse should take when the umbilical cord is palpated during a vaginal examination. The priority is to relieve pressure on the cord and improve fetal oxygenation.
Choice B rationale:
Exerting continuous upward pressure on the presenting part is the correct action when the nurse palpates the umbilical cord during a vaginal examination. This manoeuvre is called "vaginal elevation,”. helps lift the presenting part off the umbilical cord, reducing the risk of cord compression and fetal distress until the provider can take further action.
Choice C rationale:
Initiating oxytocin via continuous IV infusion is not appropriate when the umbilical cord is palpated during a vaginal examination. Oxytocin can cause uterine contractions, potentially further compromising the cord and fetus.
Choice D rationale:
Placing the client in the left-lateral position is not the best immediate action for cord palpation. While the left-lateral position is useful for relieving pressure on the vena cava in cases of supine hypotensive syndrome, the priority here is to relieve cord compression, and upward pressure on the presenting part is more effective.
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