A patient with severe COPD is given high-flow oxygen on the way to hospital and becomes drowsy. What oxygen saturation target is recommended for those at risk of hypercapnic respiratory failure?
Answer and explanation
Correct answer: C. 88 to 92 percent
- Step 1: In COPD the respiratory drive can be blunted by excessive oxygen, causing carbon dioxide retention. Step 2. BTS guidance gives a target of 88 to 92 percent, adjusted after blood gases. Answer: 88 to 92 percent. Why not the others: 94 to 98 is the target for most acutely ill adults. 100 percent risks hypercapnia. 80 to 85 percent would leave dangerous hypoxaemia.
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