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Chronic obstructive pulmonary disease: less common causes--an algorithm for the primary care physician
R C St John1, J E Gadek, E R Pacht
1Department of Medicine, Ohio State University Hospitals, Columbus.
Journal of General Internal Medicine
|October 1, 1993
Summary
Not all chronic airflow obstruction is due to smoking. Younger patients or those with minimal smoking require thorough evaluation for less common causes and potentially reversible disease.
Area of Science:
- Pulmonology
- Internal Medicine
Background:
- Chronic airflow obstruction is often attributed to cigarette smoking, leading to chronic bronchitis and emphysema.
- However, less common causes exist and warrant consideration.
Purpose of the Study:
- To review clinical features of less common causes of chronic airflow obstruction.
- To outline an approach for evaluating patients with dyspnea and chronic airflow obstruction.
Main Methods:
- Review of clinical features and distinguishing characteristics.
- Logical approach to patient evaluation.
Main Results:
- The majority of chronic airflow obstruction cases stem from cigarette-induced chronic bronchitis and/or emphysema.
- Patients younger than 40 or with limited smoking history (<20 pack-years) require detailed assessment.
Conclusions:
- A systematic evaluation is crucial for patients with chronic airflow obstruction, especially younger individuals or non-smokers.
- Identifying potentially reversible conditions is key, as not all "COPD" originates from cigarette use.