A PFT with bronchodilator is a lung function test (spirometry) that measures airflow and lung volumes before and after inhaling a short-acting bronchodilator. It compares FEV1 and FVC to detect airway obstruction and assess reversibility. An increase in FEV1 after the bronchodilator suggests reversible airway disease (for example, asthma), guiding diagnosis, treatment decisions, and monitoring.

Pulmonary function test (PFT) costs vary by location and test complexity. In public health systems it's often free; in private clinics in the United States expect roughly $50–$500 for basic spirometry to full PFTs with diffusion. In India prices commonly range ₹500–₹3,000. More advanced or hospital-based testing can cost more. Check with your provider or insurer for exact pricing and coverage.

A pulmonary function test (PFT) measures how well your lungs work. It quantifies lung volumes and capacities, airflow rates (like FEV1 and FVC), and gas exchange (diffusion). PFTs help identify obstructive versus restrictive lung disease, assess severity, monitor progression or treatment response, and evaluate fitness for surgery or occupational exposure. Results guide diagnosis, management, and follow-up of respiratory conditions.

A positive bronchodilator response means spirometry shows a significant improvement in airflow after a bronchodilator—commonly defined as an increase in FEV1 or FVC of at least 12% and 200 mL from baseline. It indicates reversible airway obstruction (typical of asthma) and suggests likely benefit from bronchodilator therapy, though clinical correlation is needed and it doesn’t rule out fixed obstruction or other causes.

Pulmonary function tests (PFTs) are generally not painful. Most involve breathing through a mouthpiece and may cause temporary discomfort—coughing, breathlessness, lightheadedness, or mild chest tightness. Body plethysmography can feel claustrophobic for some. Tests are usually quick and safe; rare risks include transient dizziness or worsening symptoms in severe lung disease. Tell the technician about any concerns before testing.

A normal pulmonary function test shows FEV1 and FVC ≥80% of predicted for age, sex, height and ethnicity. The FEV1/FVC ratio is usually ≥70–80% (age-dependent), with values below the lower limit suggesting obstruction. DLCO (diffusing capacity) is typically ≥80% predicted. Results must be interpreted against predicted values and clinical context.