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COPD patients experience poorer sleep quality and lower blood oxygen levels
Date:9/20/2012

Patients with chronic obstructive pulmonary disease (COPD) experience poorer sleep quality than people of a similar age without COPD, according to research published in the journal Respirology.

Researchers also found an independent relationship between how well patients with COPD slept and the oxygen levels in their arterial blood.

"Patients with COPD frequently report fatigue, sleepiness and impaired quality of life," says Professor Walter McNicholas from the Department of Respiratory and Sleep Medicine at St. Vincent's University Hospital, Dublin, Ireland.

"The study carried out by our group, which has been researching sleep and breathing for more than 25 years, showed that such patients experience poor sleep quality, which may contribute to these debilitating symptoms."

COPD is the name for a collection of lung diseases, including chronic bronchitis, emphysema and chronic obstructive airways disease. People with COPD have trouble breathing in and out because of long-term damage to their lungs, usually because of smoking. COPD is now the fourth leading cause of chronic death and ill health in the USA and is projected to rank fifth in the burden of disease worldwide.

The current study provides a secondary analysis of two previously published trials investigating the impact of long-acting bronchodilators on night-time oxygen saturation in 106 patients with established, moderate to severe COPD. Bronchodilators make breathing easier by relaxing the muscles in the lungs and widening the airways.

Poor sleep quality was measured in a number of ways, including a reduced percentage of rapid eye movements (REM), which occur during the deepest level of sleep.

The patients covered by the study had an average age of just over 66 years, 67 per cent were male and all were current or former smokers, with a smoking history of ten or more years. Strict clinical criteria were applied to the subjects, which ar
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Contact: Amy Molnar
sciencenewsroom@wiley.com
Wiley
Source:Eurekalert

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