EM · Acute COPD exacerbation
Acute exacerbation of chronic obstructive pulmonary disease
Also known as COPD exacerbation · Acute COPD · COAD exacerbation
The acute COPD exacerbation — the Anthonisen criteria for the clinical definition, the controlled-oxygen principle (88 to 92 per cent, not 94 to 98 per cent), the four-pillar management (controlled oxygen, nebulised bronchodilators with doses, a systemic corticosteroid, antibiotics for the purulent exacerbation), the early non-invasive ventilation (BiPAP) for the respiratory acidosis (the strongest evidence in emergency respiratory medicine), and the CO2-retainer dangers. ACEM-primary, globally tagged.
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Target exams
Red flags
- Target the oxygen saturation at 88 to 92 per cent — not 94 to 98 per cent. Uncontrolled high-flow oxygen in the CO2 retainer causes a CO2 narcosis
- A pH below 7.35 with a respiratory acidosis is the trigger for non-invasive ventilation (BiPAP) — the single strongest evidence-based intervention in emergency respiratory medicine
- Never leave the hypoxic patient on an air-driven nebuliser without supplemental oxygen — in the known retainer, drive the neb with air plus simultaneous controlled oxygen
- The COPD patient with a sudden deterioration may have a pneumothorax, a pulmonary embolism, or a left-ventricular failure — do not assume it is just the COPD
- A patient on BiPAP who becomes drowsy or who loses the respiratory effort is failing the NIV — prepare for intubation
Meet the patient
A 68-year-old man with severe COPD arrives cyanosed, pursed-lip breathing, respiratory rate 32, using every accessory muscle, SpO2 of 84 per cent on room air. The nurse reaches for the high-flow oxygen mask. That single reflex is the decision the whole topic turns on — because this man is a chronic CO2 retainer, and 15 litres of oxygen will sedate him into a narcosis before the ABG is even drawn.[1]
Two numbers decide his next hour: the oxygen target (88 to 92 per cent, titrated on a Venturi mask) and the pH on the arterial gas (the number that, if under 7.35, sends him straight to BiPAP). Hold those two numbers and the rest of the management slots into place.[1]
References13ShowHide
- [1]Plant PK, Owen JL, Elliott MW. Early use of non-invasive ventilation for acute exacerbations of chronic obstructive pulmonary disease on general respiratory wards: a multicentre randomised controlled trial Lancet, 2000.PMID 10859037
- [2]Calvello J, Avaricio M, Ruggeri P, et al. Acute Exacerbation of Chronic Obstructive Pulmonary Disease: Pharmacological Treatment of AECOPD New Perspectives Semin Respir Crit Care Med, 2026.PMID 41844237
- [3]Anthonisen NR, Manfreda J, Warren CPW, Hershfield ES, Harding GK, Nelson NA. Antibiotic therapy in exacerbations of chronic obstructive pulmonary disease Ann Intern Med, 1987.PMID 3492164
- [4]Leuppi JD, Schuetz P, Bingisser R, et al. Short-term vs conventional glucocorticoid therapy in acute exacerbations of chronic obstructive pulmonary disease: the REDUCE randomized clinical trial JAMA, 2013.PMID 23695200
- [5]Walters JA, Tan DJ, White CJ, et al. Different durations of corticosteroid therapy for exacerbations of chronic obstructive pulmonary disease Cochrane Database Syst Rev, 2018.PMID 29553157
- [6]Ram FSF, Picot J, Lightowler J, Wedzicha JA. Non-invasive positive pressure ventilation for treatment of respiratory failure due to exacerbations of chronic obstructive pulmonary disease Cochrane Database Syst Rev, 2004.PMID 15266518
- [7]Austin MA, Wills KE, Blizzard L, Walters EH, Wood-Baker R. Effect of high flow oxygen on mortality in chronic obstructive pulmonary disease patients in prehospital setting: randomised controlled trial BMJ, 2010.PMID 20959284
- [8]Donaldson GC, Seemungal TA, Patel IS, et al. Longitudinal changes in the nature, severity and frequency of COPD exacerbations Eur Respir J, 2003.PMID 14680081
- [9]Bhowmik A, Seemungal TAR, Sapsford RJ, Wedzicha JA. Relation of sputum inflammatory markers to symptoms and lung function changes in COPD exacerbations Thorax, 2000.PMID 10639527
- [10]Hess DR. Respiratory Care Management of COPD Exacerbations Respir Care, 2023.PMID 37225653
- [11]Koutsogiannis Z, Kelly AM. Does high dose ipratropium bromide added to salbutamol improve pulmonary function for patients with chronic obstructive airways disease in the emergency department? Aust N Z J Med, 2000.PMID 10800876
- [12]Wedzicha JA, Miravitlles M, Hurst JR, et al. Management of COPD exacerbations: a European Respiratory Society/American Thoracic Society guideline Eur Respir J, 2017.PMID 28298398
- [13]Tillie-Leblond I, Marquette CH, Perez T, et al. Pulmonary embolism in patients with unexplained exacerbation of chronic obstructive pulmonary disease: prevalence, risk factors, and outcomes Ann Intern Med, 2006.PMID 16549851