Abstract
Clinical scenario
A 69 year-old man attends for a follow-up appointment two weeks after being hospitalised for an exacerbation of COPD. He is improving, though not yet back to normal. He quit smoking after a previous recent admission with a severe exacerbation. Spirometry last year recorded an FEV1/FVC ratio of 0.36 and a post-bronchodilator FEV1 of 29% predicted. He is currently taking a combination long-acting β2-agonist/inhaled corticosteroid inhaler and a long-acting antimuscarinic.
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This is a high-risk patient, who was admitted with an exacerbation two weeks ago and comes for follow-up. Mortality after admission to hospital for a COPD exacerbation is 13% within 6 months.1 He has very severe airway obstruction (FEV1 29% predicted) and has had more than two exacerbations in the previous year. He thus has very severe COPD and is in the new GOLD category D.2,3
Exacerbation in patients with severe COPD
Exacerbations are commonly caused by infections. There is some evidence that COPD patients using inhaled corticosteroids (ICS) have increased risk of bacterial pneumonia.4 We should therefore look for signs of infection — fever, chills, tachycardia, coloured sputum — and also assess other possible causes like allergies, stress, under-treatment or non-adherence, and incorrect inhaler technique. In patients with very severe obstruction we should also check for respiratory failure. This can easily be measured with pulse oximetry in primary care.
In Norway we often use the C-reactive protein (CRP) test — a quick and easy test that can be performed in the office — to look for bacterial infections. CRP is an acute phase protein that rises quickly, reaches a peak on day 3–4, and goes back to normal within a week.5 A low CRP (<50) after 3–4 days when most patients come to the office would make pneumonia or other bacterial infections unlikely, and would strengthen a decision to treat the exacerbation with oral prednisolone alone (though guidelines recommend that a patient hospitalised with very severe COPD should always have antibiotics2). A high CRP (>100) indicates a bacterial infection and should always lead to a prescription of antibiotics and/or a chest X-ray or an admission to hospital with a suspicion of pneumonia. The interpretation of a CRP value between 50 and 100 depends on the time course and symptoms. In the first three days after the symptoms appear (before CRP reaches its peak) a viral infection might reach values above 50. Later in the course of the disease most of us would suspect pneumonia and treat accordingly.
Follow-up after an exacerbation
These patients should be followed-up closely and encouraged to come for an acute appointment even if they have started emergency medication. I would normally review them within a few days if they are not hospitalised, or shortly after discharge as in this case. I would check whether he had followed his self-management plan, and offer a prescription for an emergency supply of antibiotics and systemic steroids to replace the treatment he had taken during this exacerbation.
In order to assess the patient it is important to take a good history, including questions about purulent sputum. It does not take long to fill in a disease-specific health status questionnaire such as the COPD Control Questionnaire6 in order to monitor objective improvement from the start of the exacerbation. Then a careful clinical examination should be done, paying attention to the lung sounds and presence of signs of pneumonia or heart failure, and an assessment of his BMI. A check on his oxygen saturation with a pulse oximeter may also be helpful, and a value of 92% or less indicates that referral for long-term oxygen therapy should be considered. In these patients performing spirometry might make the patient worse in the acute phase.2 Two weeks after an exacerbation it might be safe, but rarely gives any valuable information — most probably the FEV1 would be around the same value anyway…
Most patients get better within a couple of weeks, though it might take several months to return to how they felt before the exacerbation, as measured by quality of life questionnaires.7 Finally we should think of, and manage, co-morbidities — such as lung cancer, hypertension, heart failure, diabetes, osteoporosis and anxiety/depression.
On-going management
The patient is already receiving maximal drug treatment, taking a combination of ICS and LABA as well as a long-acting antimuscarinic. Compliance and correct inhalation technique is often poor, and I find it very useful to have the patient demonstrating this at each visit — very often improvements can be made.8 One might consider adding roflumilast (a PDE4 inhibitor) if he has a lot of symptoms of cough and mucus.9 Roflumilast is a new oral treatment indicated as maintenance therapy for patients with severe COPD associated with symptoms of chronic bronchitis and with a history of frequent exacerbations,10 though more research is needed to clarify its place in the management of COPD.11
The patient should also be encouraged to do some exercise. If it is available, he might be referred for pulmonary rehabilitation, as studies have shown that rehabilitation following hospitalisation for COPD can reduce readmissions.12,13 He has already stopped smoking, and it is important to reinforce and give him credit for this. If this has not been done he should also have a yearly ’flu vaccination and I would consider offering a pneumococcal vaccination.
COPD patients have an increased risk of lung cancer compared to people without COPD.14 It is therefore important to consider whether one should do a chest x-ray. If the patient had not responded to treatment or if I had found any other unexpected signs I would have sent him for an x-ray.
The prognosis in patients with very severe COPD is not good,15 and I would listen to the patient to pick up on his concerns. These patients are often isolated and have a poor quality of life. They may be depressed and scared by the experience of an exacerbation. I might look for an opportunity to discuss end-of-life issues,16 especially if I had found signs of respiratory failure.
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Henrichsen, S. How I would manage a man with COPD who is symptomatic and at high risk of an exacerbation: a primary care perspective from Norway. Prim Care Respir J 21, 448–449 (2012). https://doi.org/10.4104/pcrj.2012.00100
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DOI: https://doi.org/10.4104/pcrj.2012.00100