Spirometry – Assessing Lung Function

Spirometry is a pulmonary function test used to measure how much air you can inhale and exhale, as well as how fast you can breathe out. It is commonly used to diagnose and manage conditions that affect lung function, such as asthma, chronic obstructive pulmonary disease (COPD), and pulmonary fibrosis.

Indications for Spirometry Test:

● Diagnosis of asthma: To assess lung function in patients with wheezing, coughing, or shortness of breath.

● Chronic obstructive pulmonary disease (COPD): To evaluate lung function in smokers or individuals with a history of respiratory issues.

● Pre-surgical assessment: To evaluate lung function before undergoing thoracic surgery or other procedures that affect the respiratory system.

● Monitoring treatment: To monitor the effectiveness of medications in lung diseases like asthma or COPD.

How Spirometry Works:

● During the test, the patient is asked to breathe into a mouthpiece connected to the spirometer. The spirometer records the volume of air exhaled and the speed of exhalation. Key measurements include forced expiratory volume (FEV1) and forced vital capacity (FVC).

Normal Range:

● FEV1/FVC ratio: A normal result shows that at least 70% of the air is exhaled within the first second.

● Normal lung volumes: The specific values depend on age, sex, and height.

Abnormal Test Significance:

● Reduced FEV1/FVC ratio: Indicates obstructive lung diseases like asthma or COPD.

● Normal ratio but reduced lung volumes: Suggests restrictive lung disease, such as pulmonary fibrosis.

● Difficulty exhaling: May indicate airway obstruction or weakness in the lungs.

Management Based on Results:

● For obstructive diseases: Treatment involves bronchodilators, steroids, or other medications.

● For restrictive diseases: Management may include pulmonary rehabilitation, oxygen therapy, or steroids.

Price in India:

Approx. ₹1,500 – ₹3,500 for a spirometry test.