Chronic obstructive pulmonary disease
Chronic obstructive pulmonary disease (COPD) is a common lung disease. Having COPD makes it hard to breathe.
There are two main forms of COPD:
- Chronic bronchitis, which involves a long-term cough with mucus
- Emphysema, which involves damage to the lungs over time
Most people with COPD have a combination of both conditions.
COPD; Chronic obstructive airways disease; Chronic obstructive lung disease; Chronic bronchitis; Emphysema; Bronchitis - chronic
Smoking is the main cause of COPD. The more a person smokes, the more likely that person will develop COPD. But some people smoke for years and never get COPD.
In rare cases, nonsmokers who lack a protein called alpha-1 antitrypsin can develop emphysema.
Other risk factors for COPD are:
- Exposure to certain gases or fumes in the workplace
- Exposure to heavy amounts of secondhand smoke and pollution
- Frequent use of a cooking fire without proper ventilation
Symptoms may include any of the following:
- Cough, with or without mucus
- Many respiratory infections
- Shortness of breath (dyspnea) that gets worse with mild activity
- Trouble catching one's breath
Because the symptoms develop slowly, some people may not know that they have COPD.
Exams and Tests
The best test for COPD is a lung function test called spirometry. This involves blowing out as hard as possible into a small machine that tests lung capacity. The results can be checked right away.
Using a stethoscope to listen to the lungs can also be helpful. But sometimes, the lungs sound normal, even when a person has COPD.
Sometimes, a blood test called arterial blood gas may be done to measure the amounts of oxygen and carbon dioxide in the blood.
There is no cure for COPD. But there are many things you can do to relieve symptoms and keep the disease from getting worse.
If you smoke, now is the time to quit. This is the best way to slow lung damage.
Medicines used to treat COPD include:
- Inhalers (bronchodilators) to help open the airways
- Inhaled or oral steroids to reduce lung inflammation
- Anti-inflammatory drugs to reduce swelling in the airways
- Certain long-term antibiotics
In severe cases or during flare-ups, you may need to receive:
- Steroids by mouth or through a vein (intravenously)
- Bronchodilators through a nebulizer
- Oxygen therapy
- Assistance from a machine to help breathing by using a mask, BiPAP, or through the use of an endotracheal tube
Your health care provider may prescribe antibiotics during symptom flare-ups, because an infection can make COPD worse.
You may need oxygen therapy at home if you have a low level of oxygen in your blood.
Pulmonary rehabilitation does not cure COPD. But it can teach you to breathe in a different way so you can stay active and feel better.
You can do things every day to keep COPD from getting worse, protect your lungs, and stay healthy.
Walk to build up strength:
- Ask the provider or therapist how far to walk.
- Slowly increase how far you walk.
- Avoid talking if you get short of breath when you walk.
- Use pursed lip breathing when you breathe out, to empty your lungs before the next breath.
Things you can do to make it easier for yourself around the home include:
- Avoid very cold air or very hot weather
- Make sure no one smokes in your home
- Reduce air pollution by not using the fireplace and getting rid of other irritants
Eat healthy foods, including fish, poultry, and lean meat, as well as fruits and vegetables. If it is hard to keep your weight up, talk to a provider or dietitian about eating foods with more calories.
Surgery may be used to treat COPD. Only a few patients benefit from these surgical treatments:
- Surgery to remove parts of the diseased lung, which can help less-diseased parts work better in some patients with emphysema
- Lung transplant for a small number of very severe cases
You can ease the stress of illness by joining a support group. Sharing with others who have common experiences and problems can help you not feel alone.
COPD is a long-term (chronic) illness. The disease will get worse more quickly if you do not stop smoking.
If you have severe COPD, you will be short of breath with most activities. You may be admitted to the hospital more often.
Talk with your provider about breathing machines and end-of-life care as the disease progresses.
With COPD, you may have other health problems such as:
- Irregular heartbeat (arrhythmia)
- Need for breathing machine and oxygen therapy
- Right-sided heart failure or cor pulmonale (heart swelling and heart failure due to chronic lung disease)
- Severe weight loss and malnutrition
- Thinning of the bones (osteoporosis)
- Increased anxiety
When to Contact a Medical Professional
Go to the emergency room or call the local emergency number (such as 911) if you have a rapid increase in shortness of breath.
Not smoking prevents most COPD. Ask your provider about quit-smoking programs. Medicines are also available to help you stop smoking.
Anderson B, Conner K, Dunn C, et al. Institute for Clinical Systems Improvement. Diagnosis and Management of Chronic Obstructive Pulmonary Disease (COPD). 9th edition. Updated March 2013. https://www.icsi.org/_asset/yw83gh/COPD.pdf. Accessed July 21, 2015.
Celli BR, Zuwallack RL. Pulmonary rehabilitation. In: Broaddus VC, Mason RJ, Ernst JD, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 6th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 105.
Han MK, Lazarus SC. COPD. In: Broaddus VC, Mason RJ, Ernst JD, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 6th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 44.
Reviewed By: Denis Hadjiliadis, MD, MHS, Associate Professor of Medicine, Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.