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Chronic bronchitis — Clinical Guidelines

Overview

Chronic bronchitis is characterized by chronic inflammation of the bronchial mucosa leading to persistent cough and sputum production for at least three months over two consecutive years, excluding other causes of chronic cough 1.

Diagnosis

Key Criteria: Chronic productive cough lasting ≥3 months, occurring for ≥2 consecutive years 1.

Recommended Tests: Spirometry to assess airflow obstruction (FEV1/FVC ratio) 5.

Grading: Severity often assessed based on symptoms and spirometric parameters 5.

Management

First-Line Treatments:

- Bronchodilators: Short-acting beta-agonists (SABAs) and long-acting bronchodilators (LABAs) 1. - Antibiotics: For acute exacerbations; cefdinir 300 mg twice daily for 5 days or cefprozil 500 mg twice daily for 10 days show comparable efficacy 2.

Adjunctive Treatments:

- Corticosteroids: Inhaled corticosteroids may be considered for frequent exacerbations 1. - Chest Physiotherapy: To assist sputum clearance 1.

Special Populations

Smokers: Prevalence significantly higher in smokers compared to non-smokers, with smoking being a major risk factor 7.

Elderly: No specific age-related rise in respiratory symptoms noted in industrial populations studied 7.

Comorbidities: Chronic bronchitis may coexist with other respiratory conditions; careful monitoring of pulmonary function is advised 5 6.

Key Recommendations

Use bronchodilators for symptom management in chronic bronchitis (Evidence: Strong 1).

Consider antibiotic therapy with either cefdinir or cefprozil for acute exacerbations, based on clinical judgment and pathogen sensitivity (Evidence: Moderate 2).

Monitor pulmonary function regularly, especially in smokers and elderly populations, to assess disease progression (Evidence: Moderate 5 7).

References

1 Xiong XJ, Chu FY, Li HX, He QY. Clinical application of the TCM classic formulae for treating chronic bronchitis. Journal of traditional Chinese medicine = Chung i tsa chih ying wen pan 2011. link60016-2) 2 Fogarty CM, Bettis RB, Griffin TJ, Keyserling CH, Nemeth MA, Tack KJ. Comparison of a 5 day regimen of cefdinir with a 10 day regimen of cefprozil for treatment of acute exacerbations of chronic bronchitis. The Journal of antimicrobial chemotherapy 2000. link 3 Gabbrielli S, Stanflin N, Di Preta F. Origin of bronchial and pulmonary elastic fibers and their role in some pathological events. Pathologica 1994. link 4 Ping FC, Oulton JL, Smith JA, Skidmore AG, Jenkins LC. Bacterial filters - are they necessary on anaesthetic machines?. Canadian Anaesthetists' Society journal 1979. link 5 Saric M, Kalacic I, Holetic A. Follow-up of ventilatory lung function in a group of cement workers. British journal of industrial medicine 1976. link 6 Morton A, Baker AB, Hansen P, Mahoney P, Seymour R. Pulmonary oedema in chronic bronchitis - a haemodynamic study. Resuscitation 1975. link90064-7) 7 Joshi RC, Madan RN, Brash AA. Prevalence of chronic bronchitis in an industrial population in North India. Thorax 1975. link 8 Enterline PE, Henderson V. The health of retired fibrous glass workers. Archives of environmental health 1975. link

Chronic bronchitis