Pulmonology
Pulmonology is the medical specialty focused on the lungs, airways, breathing, oxygen exchange, respiratory diseases, lung testing, prevention, and long-term respiratory care.
What pulmonology is
Pulmonology is the branch of medicine that focuses on breathing and the respiratory system. Pulmonologists evaluate symptoms such as cough, shortness of breath, wheezing, chest tightness, low oxygen, abnormal lung imaging, or repeated infections. The work connects physiology, imaging, infection care, critical care, sleep medicine, rehabilitation, and prevention.
How breathing works
Breathing depends on airways, lungs, blood vessels, the diaphragm, chest wall, nerves, and the brainเน€เธยเนยเธเธขยs control systems. Air moves through the nose, mouth, throat, windpipe, bronchi, and smaller airways into air sacs called alveoli. Oxygen passes into the blood while carbon dioxide moves out. Small changes in this system can affect energy, sleep, exercise, and organ function.
Symptoms and first clues
Respiratory symptoms can come from many causes. A cough may reflect infection, asthma, reflux, medication effects, smoking exposure, or lung disease. Shortness of breath may involve the lungs, heart, blood, muscles, anxiety, or conditioning. Pulmonology looks for patterns: timing, triggers, sputum, fever, oxygen level, exposures, imaging, and response to treatment.
Testing lung function
Pulmonary function tests measure how much air a person can move, how quickly air flows, and how well gases cross from the lungs into the blood. Spirometry is a common test for airflow limitation. Other tests may measure lung volumes, diffusion capacity, exercise response, oxygen levels, sleep breathing, or airway inflammation. Results are interpreted with symptoms and examination findings.
Imaging and procedures
Chest X-rays, CT scans, ultrasound, and sometimes MRI can show infection, fluid, scarring, nodules, blood clots, collapsed lung, airway disease, or lung damage. Bronchoscopy lets clinicians look inside airways, collect samples, remove mucus plugs or foreign bodies, and sometimes guide treatment. Imaging and procedures are chosen to answer specific clinical questions.
Chronic respiratory disease
Pulmonology often involves long-term conditions. Asthma can narrow and inflame airways. COPD can limit airflow and make breathing harder over time. Interstitial lung diseases can scar lung tissue. Sleep apnea can repeatedly interrupt breathing during sleep. Care may include inhalers, oxygen, pulmonary rehabilitation, smoking cessation, vaccines, devices, medicines, and monitoring.
Critical care and respiratory failure
Pulmonologists often work in intensive care, especially when breathing fails. Respiratory failure can occur from pneumonia, sepsis, trauma, severe asthma, COPD flare, lung clots, neuromuscular disease, or acute respiratory distress syndrome. Treatment may include oxygen, noninvasive ventilation, mechanical ventilation, medicines, drainage procedures, or support while the lungs heal.
Why it matters
Pulmonology matters because breathing is both constant and fragile. Lung disease can limit work, sleep, exercise, speech, travel, surgery, and survival. Good respiratory care can prevent attacks, detect serious disease earlier, improve oxygen delivery, reduce hospitalizations, and help people live better with chronic conditions.