A nurse is teaching a newly licensed nurse about the uses of ultrasonography in the first trimester of pregnancy. Which of the following statements by the newly licensed nurse indicates an understanding of the teaching?

Choice Arationale:
Offering the client a sitz bath may provide some relief, but it does not address the underlying issue of bladder distention. The priority is to address the bladder distention directly.

Choice Brationale:
Inserting a urinary catheter is not the first-line intervention for bladder distention after vaginal birth. Catheterization carries a risk of infection and trauma, so it should only be done if other interventions are not effective.

Choice C rationale:
Assisting the client to the bathroom is the first action the nurse should take. Bladder distention can occur after birth due to the pressure on the bladder during labour and birth. Encouraging the client to empty her bladder will relieve the distention and promote comfort.

Choice D rationale:
Pouring warm water over the client's perineum might provide some comfort, but it does not address the bladder distention itself.

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.