Interventional pulmonology is a subspecialty of lung medicine focused on minimally invasive procedures to diagnose and treat diseases of the airways, lungs, and the space surrounding the lungs (the pleural space). Where a general pulmonologist might manage your condition with medications and imaging, an interventional pulmonologist uses specialized tools inserted through the airways or chest wall to biopsy suspicious nodules, open blocked airways, drain fluid, and even treat severe emphysema or asthma. Think of it as the procedural arm of lung medicine.
How It Differs From General Pulmonology
A general pulmonologist diagnoses and manages lung diseases like asthma, COPD, and infections, largely through medication, imaging, and standard bronchoscopy. An interventional pulmonologist builds on that foundation with advanced procedural skills: rigid bronchoscopy, airway stent placement, endobronchial ultrasound, laser therapy, cryotherapy, and robotic-assisted bronchoscopy, among others. The distinction is similar to the difference between a cardiologist and an interventional cardiologist who performs catheterizations and stent placements.
The ACGME, which accredits medical training programs in the United States, formally defines interventional pulmonology as a subspecialty that “focuses on the evaluation and management of thoracic diseases primarily involving the airways, lung parenchyma, and pleural space, with focus on minimally invasive diagnostic and therapeutic procedural skills beyond the scope of standard pulmonary medicine fellowship requirements.”
Diagnosing Lung Cancer and Other Conditions
One of the most common reasons you’d see an interventional pulmonologist is to get a tissue sample from a suspicious spot in your lung or the lymph nodes in your chest. The cornerstone tool for this is endobronchial ultrasound-guided transbronchial needle aspiration, or EBUS. During this procedure, a thin scope with an ultrasound sensor at its tip is passed through your mouth into your airways, allowing the physician to see lymph nodes and masses in real time and guide a needle directly into them.
EBUS is highly reliable. Studies comparing EBUS results to surgical pathology show a diagnostic accuracy of about 94%, with a specificity of 99%, meaning it very rarely calls something cancerous when it isn’t. The procedure is also quite safe. Across large studies involving thousands of patients, serious complications are uncommon. Mortality is extremely low, at 0.01% to 0.04%. The most frequent issue is mild bleeding, occurring in under 1% of cases. Fever develops in some patients afterward, and serious infections like pneumonia or mediastinitis are rare.
Robotic-Assisted Bronchoscopy
For nodules deep in the lung’s periphery, where traditional scopes have difficulty reaching, robotic-assisted bronchoscopy is a newer option. A robot-controlled catheter navigates through increasingly small airways to reach lesions that would otherwise require a needle through the chest wall or even surgery. A pooled analysis of available studies found a diagnostic yield of about 80% overall, rising to 88% for nodules larger than 2 centimeters and 92% for those larger than 3 centimeters. For smaller nodules under 2 centimeters, the yield is around 78%, which is still a meaningful improvement over older navigation techniques for many patients.
Opening Blocked Airways
Tumors, scar tissue, or external compression can narrow the trachea and main bronchi enough to cause dangerous breathing difficulty. Interventional pulmonologists restore airflow using a combination of techniques, often during the same procedure. Rigid bronchoscopy, performed under general anesthesia, allows them to physically dilate a narrowed airway, remove obstructing tumor tissue, and place a stent to keep the airway open.
Two main types of airway stents exist: silicone and metal. Silicone stents are the workhorse for both cancerous and non-cancerous blockages causing more than 50% narrowing of the trachea or bronchi. They’re particularly preferred for benign conditions because they can be repositioned or removed relatively easily. Metal stents, which have evolved from bare metal designs to newer covered versions, are also used but carry a higher risk of growing into the airway wall over time, making removal difficult. For pure external compression with no tumor inside the airway, the approach typically involves balloon dilation followed by stent placement.
Laser therapy, electrocautery, and cryotherapy round out the toolkit. These allow tissue destruction inside the airway, whether to debulk a tumor or remove scar tissue, and are often used alongside stenting.
Managing Fluid Around the Lungs
Malignant pleural effusions, where cancer causes fluid to repeatedly accumulate between the lung and chest wall, are a frequent problem interventional pulmonologists manage. Two main approaches exist: chemical pleurodesis, which uses a substance like talc to seal the space and prevent fluid from returning, and tunneled pleural catheters, which are small tubes placed through the chest wall that allow you to drain fluid at home on a regular schedule.
A meta-analysis of five randomized trials involving 545 patients found no difference in survival or breathlessness between the two approaches. However, patients who received tunneled catheters spent less time in the hospital overall and were less likely to need additional pleural procedures. The tradeoff is a higher risk of skin infection (cellulitis) around the catheter site. The choice between the two often comes down to individual preference: some patients prefer a single hospital procedure with pleurodesis, while others prefer the independence of draining at home and avoiding a longer initial stay.
Treating Severe Emphysema
For patients with severe emphysema whose lungs are badly hyperinflated, endobronchial valves offer a non-surgical alternative to lung volume reduction surgery. These tiny one-way valves are placed into the airways of the most damaged lobe of the lung during a bronchoscopy. They block air from entering that lobe while allowing trapped air and mucus to escape, causing the damaged section to partially deflate. This gives the healthier portions of the lung more room to expand.
Not everyone with emphysema qualifies. Candidates typically have severe airflow obstruction with lung function between 15% and 50% of predicted, significant hyperinflation, and meaningful limitations in daily activity despite already being on optimal medical treatment, including medications, pulmonary rehabilitation, and smoking cessation. A key requirement is confirming there’s no air leaking between lung lobes (called collateral ventilation), because the valves won’t work if air simply flows in through a neighboring lobe. Patients with very severe oxygen or carbon dioxide levels, significant heart failure, or pulmonary hypertension are generally not good candidates.
Bronchial Thermoplasty for Severe Asthma
In severe asthma that remains uncontrolled despite high-dose inhaled steroids and other medications, bronchial thermoplasty is a procedure that delivers controlled heat to the airway walls. This reduces the mass of smooth muscle lining the airways, which is the tissue responsible for the airway tightening that triggers asthma attacks. Researchers believe additional mechanisms may contribute, including changes to airway nerves, glands, and the lining of smaller airways, though the smooth muscle reduction appears to be the primary effect.
Candidates are adults aged 18 to 65 with asthma requiring high-dose inhaled steroids plus a long-acting bronchodilator, with lung function at 60% predicted or above, and a nonsmoking history. Patients with frequent respiratory infections, frequent hospitalizations, or a history of life-threatening asthma requiring intubation are excluded. The procedure is performed in three separate sessions, each treating a different section of the lungs, spaced several weeks apart.
Training and Qualifications
Becoming an interventional pulmonologist requires completing medical school, an internal medicine residency, a pulmonary and critical care medicine fellowship (typically three years), and then an additional year of dedicated interventional pulmonology fellowship. That final year, which must be at least 12 months, is accredited by the ACGME and provides intensive training in both diagnostic and therapeutic procedures across malignant and non-malignant thoracic diseases. Fellows must demonstrate competency across six areas: medical knowledge, patient care and procedural skills, communication, professionalism, practice-based learning, and systems-based practice. In total, the path from medical school graduation to independent practice as an interventional pulmonologist spans roughly seven to eight years of postgraduate training.