Acute Exacerbation of Chronic Obstructive Pulmonary Disease (AECOPD)
COPD exacerbations are defined by:
- Increased dyspnoea
- Worsening cough
- Increasing sputum volume or purulence.
Assessment / monitoring
- FBC, U&Es, LFTs and CRP
- Sputum culture and consider tap water viral gargle if suspected influenza
- Oxygen saturations
- Arterial blood gases
- Theophylline level (if patient is on theophylline).
Documentation of previous spirometry, smoking history and functional capacity is important in assessment of patients with AECOPD. Recurrent exacerbations are unusual in patients with mild COPD. Common differential diagnosis to consider include:
- Pneumonia, pneumothorax, pulmonary embolus
- Left ventricular failure
- Lung cancer
- Oxygen 28% via venturi mask if SpO2 <88% until gases checked, then titrate according to arterial blood gases. Prescribe on kardex.
- Prednisolone oral 30mg-50mg each morning, for 7 days. If patient is unable to take oral treatment give:
- Hydrocortisone IV 100mg immediately then review, and if there is a need to continue IV therapy, prescribe 50mg 6 hourly.
- Nebulisation should be with air. Supplementary oxygen via nasal cannula during nebulisation (1-6L/minute to maintain oxygen saturation 88-92%). Use a mouthpiece or close fitting mask to avoid risk of acute angle-closure glaucoma with ipratropium.
- Salbutamol 2.5-5mg nebules four times daily (but can be given up to 2 hourly as needed)
- Ipratropium 0.5mg nebules four times daily (add if poor response to salbutamol).
- IV bronchodilators: aminophylline infusion may be considered if there is no response to nebulised therapy (dose administration and monitoring guidance see Appendices 2 and 3). N.B. The evidence for aminophylline in AECOPD is limited although individual patients may benefit. Discuss with senior doctors. Side effects include nausea, seizures and cardiac arrhythmias.
- Non-invasive ventilation: If worsening respiratory acidosis or hypercapnia occurs, despite achieving target oxygen levels and adequate immediate therapy, ventilation may be indicated (see Non-invasive ventilation protocol in COPD).
- Indicated in the presence of increased sputum purulence, raised inflammatory markers or focal radiological changes. They should be given orally unless there is a clinical reason for giving IV antibiotics. Send sputum for microscopy and culture. For antibiotic choice and course duration see lower respiratory tract infections treatment guideline
- Note: Serious drug interactions with clarithromycin (see BNF Appendix 1) and QTc prolongation (see the Medicines Update Extra (MUE 08) Drug Induced QT Prolongation article at www.ggcmedicines.org.uk).
- DVT Prophylaxis
- Physiotherapy: May be required for mucus plugging or dense consolidation present on x-ray. There is no evidence to support emergency call out.
- Mucolytic therapy:
- May be of symptomatic benefit in patients to aid sputum clearance.
- Carbocisteine oral 750mg three times daily. Reduce to 1.5g daily in divided doses after a month or stop if no improvement.
Prior to discharge
- Stop oxygen when SpO2 maintained >88% (unless on home oxygen).
- If still benefiting from nebulisers, consider early supported discharge (ESD). Home nebulisers should not be introduced as routine treatment immediately after acute exacerbation.
- Prednisolone oral 30mg-50mg each morning for 7 days, without dose tapering, will be suitable for most patients.
N.B. There may be circumstances however where a more prolonged course or a tapering dose is necessary. In patients who are oral steroid dependent, reduce the dose to the normal maintenance dose. If multiple recent courses of high dose oral steroids, consider a stepped reduction in dose. If in doubt, discuss with senior. Long term steroids are not indicated in patients with COPD.
- Ensure inhaled medications optimised prior to discharge and appropriate inhaler technique (see the 'Asthma and COPD preferred list inhaler device guide' which can be found on NHSGGC StaffNet by searching in the Clinical Guideline Electronic Resource Directory)
- Consider referral for early supported discharge (ESD - respiratory nurse specialists).
- Consider referring for pulmonary rehabilitation (if MRC dyspnoea grade is ≥3 when stable if not attended in the last 2 years).
- Smoking cessation advice, nicotine replacement and referral to smoking cessation services if appropriate (see Appendix 1).
- Home oxygen is usually assessed as an outpatient when patients are stable for at least 6 weeks post exacerbation and non-smoking.
Content last updated April 2019