A nurse is caring for a client who is experiencing uterine atony immediately following delivery. The client fails to respond to oxytocin administration. The nurse should anticipate the use of which of the following medications?

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.

Choice A rationale:
Telangiectatic nevi are commonly known as "stork bites”. or "angel kisses”. and are superficial vascular areas commonly found on the nape of the neck or the eyelids of newborns? These are benign and pose no significant health risks.

Choice B rationale:
Erythema toxicum is a common, benign skin rash that appears in the first few days of life. It presents as small, raised red spots with a surrounding halo and is not related to a nuchal cord.

Choice C rationale:
Periauricular papillomas, also known as "ear tags,”. are small, skin-coloured nodules that can be found near the external ear. They are also benign and unrelated to a nuchal cord.

Choice D rationale:
Facial petechiae are tiny, red or purple pinpoint spots on the skin caused by minor haemorrhages. In newborns, facial petechiae can be associated with a nuchal cord, which is a condition where the umbilical cord is wrapped around the baby's neck during delivery. This condition is relatively common and usually resolves without complications. The nurse should monitor the baby for any signs of distress or complications related to the nuchal cord.