Disorders of the Upper Respiratory System: Bronchiectasis

Core Concepts

How the airways normally protect themselves — and what breaks

Healthy airways are lined with mucus that traps inhaled particles and with cilia that beat continuously to carry that mucus up to the throat, where it is swallowed or coughed out. Bronchiectasis breaks both parts: inflammation and infection destroy the elastic and muscle fibers of the airway wall, so the airway loses its ability to stay narrow and clear mucus; the cilia are damaged or destroyed. Mucus then collects in the widened, floppy airways — a warm, moist culture medium where bacteria thrive.

The vicious cycle

Once mucus pools, bacteria colonize the airway. The immune response and bacterial products cause more inflammation, which damages more airway wall, which dilates more airways and destroys more cilia — which pools more mucus. This self-perpetuating loop explains why bronchiectasis tends to progress: each infection episode can leave the airways a little worse. Breaking the cycle — especially by clearing mucus — is the whole point of daily management.

Causes: many roads, one destination

Bronchiectasis has many underlying causes, and sometimes none is found (idiopathic). Well-recognized causes include: severe or repeated infections (pneumonia, tuberculosis, whooping cough); cystic fibrosis (the most common cause in children and young adults in many high-income countries); immune deficiencies; aspiration of stomach contents or foreign bodies; primary ciliary dyskinesia (a condition in which cilia do not work); allergic bronchopulmonary aspergillosis (an allergic reaction to a fungus); and connective tissue diseases such as rheumatoid arthritis. Identifying the cause matters because some causes have specific treatments and because family members may need screening (for example, in genetic conditions) — but the diagnostic workup is the provider's, guided by specialists.

What it looks like: signs, symptoms, and findings

The hallmark is a chronic, productive cough producing large volumes of thick, purulent (pus-like) sputum — classically worse in the morning after mucus pools overnight. Exacerbations add increased sputum, changing sputum color or consistency, worsening cough and breathlessness, fever, and fatigue. On examination, crackles (often coarse) are common, and some people develop clubbing. Between exacerbations, the person may feel relatively well or may have daily symptoms. A history of repeated chest infections in the same location — or of bronchiectasis in a person with cystic fibrosis or another known cause — should raise suspicion.

Diagnosis: how it's confirmed

High-resolution CT (HRCT) of the chest is the diagnostic standard — it shows the dilated, thick-walled airways directly. Sputum cultures identify which bacteria are present and guide antibiotic choices during exacerbations. Pulmonary function tests show the pattern and severity of airflow limitation. The workup for an underlying cause (sweat chloride or genetic testing for cystic fibrosis, immunoglobulin levels, ciliary function studies, and others) is directed by the provider, often with pulmonology specialists. No single blood test diagnoses bronchiectasis.

Nursing management: the daily work of breaking the cycle

• Airway clearance — the cornerstone of daily care: techniques such as postural drainage (positioning so gravity helps mucus drain), chest percussion and vibration, huff coughing (a controlled, gentle cough technique), and positive expiratory pressure (PEP) devices, all taught and supervised per the person's plan and provider orders. The goal is to move mucus out before it breeds infection.
• Sputum monitoring — amount, color, thickness, odor; report changes early, since a change in sputum character is often the first sign of an exacerbation.
• Exacerbation recognition and care — report worsening cough, more or thicker sputum, fever, or breathlessness early; implement prescribed treatment promptly.
• General health support — good nutrition and hydration, physical activity and pulmonary rehabilitation as prescribed, and recommended immunizations (such as influenza and pneumococcal vaccines, per current guidelines) to reduce infection risk.
• Hemoptysis awareness — teach the person to report any blood in sputum; large-volume bleeding is an emergency requiring immediate care.
• Education and partnership — the person and family are the daily managers of this condition; teaching is the intervention that keeps the cycle broken between visits.

Scope note: airway clearance techniques, device use, and teaching fall within nursing practice, but the specific clearance program, device prescription, antibiotics, and vaccinations are determined by the provider and institutional policy; nurses follow and reinforce them.

Common Confusions