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Overlap syndrome--Asthma and obstructive sleep apnea
D Madama1, A Silva1, M J Matos1
1Pulmonology Department, Coimbra Hospital and University Centre, Portugal.
Revista Portuguesa De Pneumologia
|November 26, 2015
Summary
Obstructive sleep apnea (OSA) is frequently diagnosed in asthma patients, with over half experiencing it. Investigating OSA in poorly controlled asthma cases is crucial for better symptom management and improved patient outcomes.
Area of Science:
- Pulmonology
- Sleep Medicine
- Internal Medicine
Background:
- Asthma is a chronic inflammatory airway disease with poorly understood causality.
- Obstructive sleep apnea (OSA) is recognized as a risk factor for asthma exacerbations.
Purpose of the Study:
- To characterize asthma patients with suspected OSA.
- To determine the prevalence of OSA in this cohort.
- To review the literature on the asthma-OSA overlap syndrome.
Main Methods:
- Retrospective study of asthma patients undergoing sleep studies over three years.
- Analysis of demographic, clinical, BMI, and sleep study data.
- Diagnosis of OSA confirmed via polysomnography or cardiorespiratory polygraphy.
Main Results:
- OSA was diagnosed in 57.4% of the 47 asthma patients studied.
- Obesity (BMI > normal) was prevalent in 89.36% of patients.
- OSA prevalence was higher in males (73.3%) than females (50%).
- Home ventilation therapy was the primary treatment for 81.8% of patients.
Conclusions:
- The co-occurrence of asthma and OSA is increasingly common, with a higher prevalence (57.4%) in this study than in the general population.
- All patients showed symptom improvement after treatment for OSA.
- Screening for OSA is essential in asthma patients with uncontrolled symptoms to optimize management.
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