ModerateRespiratoryAcute exacerbation of COPDuk-plab-1
A 70-year-old woman with COPD presents with increased dyspnoea, productive cough with green sputum and wheeze over 3 days. Oxygen saturation is 89 percent on air, respiratory rate 26 per minute. Chest X-ray shows hyperinflated lungs but no consolidation. What is the most appropriate target oxygen saturation range while treating her exacerbation?