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Severe acute asthma — RACP Written MCQ

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EasyRespiratorySevere acute asthmaRACP Written

A 28-year-old woman presents during a Melbourne thunderstorm with wheeze, inability to speak full sentences and oxygen saturation 89% on room air. She is using accessory muscles; PEFR is 35% predicted. She is receiving oxygen, repeated inhaled bronchodilator and systemic corticosteroid. What is the most appropriate investigation?

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Correct answer: E — Arterial or venous blood gas assessment

Severe acute asthma with hypoxaemia warrants blood gas assessment for hypercapnia and acidosis while acute treatment and escalation continue.

Reference: Australian Asthma Handbook; TSANZ guidance; Therapeutic Guidelines: Respiratory