A bronchoscopy is a procedure that lets a doctor look inside your airways using a thin, lighted tube called a bronchoscope. The tube is guided through your nose or mouth, down your throat, and into your lungs, giving a real-time view of the windpipe and branching air passages. It’s used both to diagnose lung problems and to treat them, and it’s one of the most commonly performed procedures in pulmonary medicine.
Why a Bronchoscopy Is Performed
Doctors order a bronchoscopy when they need to investigate something they can’t see on imaging alone or when they need to intervene directly inside the airways. On the diagnostic side, common reasons include coughing up blood, a persistent unexplained cough, collapsed lung tissue, unusual shadows or masses seen on a chest scan, swollen lymph nodes in the chest, and pneumonia that isn’t responding to treatment. Bronchoscopy is also a key tool for staging lung cancer, because it allows doctors to sample lymph nodes near the lungs and determine how far cancer has spread.
On the therapeutic side, the procedure can retrieve objects stuck in the airway (especially in children), place stents to hold open narrowed passages, remove or shrink tumors blocking the airways, and treat persistent air leaks. It’s also used to help with difficult intubations when a patient can’t be put on a breathing tube through standard methods.
Flexible vs. Rigid Bronchoscopy
Most bronchoscopies use a flexible scope, a thin, bendable tube that can navigate deep into the smaller branches of the lungs. Flexible bronchoscopy has been the standard tool in lung medicine since the 1960s. It’s less invasive, more comfortable for the patient, and can reach airways that a rigid scope simply can’t get to.
A rigid bronchoscope is a straight, hollow metal tube. It’s bulkier but offers more control and the ability to pass larger instruments through it. Rigid bronchoscopy is typically reserved for situations that require heavy-duty intervention: removing large foreign bodies, placing airway stents, or debulking tumors that are blocking a major airway. It always requires general anesthesia, whereas flexible bronchoscopy often does not. In studies comparing the two for foreign body removal, success rates are similar, though the flexible approach sometimes needs to be converted to rigid if the object is difficult to grasp.
Ultrasound-Guided and Robotic Bronchoscopy
Standard bronchoscopy works well for problems near the center of the lungs, but lesions sitting out near the edges have always been harder to reach and biopsy accurately. Two newer technologies address this.
Endobronchial ultrasound (EBUS) attaches a small ultrasound probe to the tip of the bronchoscope. This lets the doctor see structures just outside the airway wall, particularly lymph nodes, and guide a needle into them in real time. EBUS can sample nodes as small as 5 millimeters and has a specificity of 100% in multiple studies, meaning that when it identifies cancer in a lymph node, it’s almost certainly correct. It has largely replaced more invasive surgical biopsies for lung cancer staging.
Robot-assisted bronchoscopy is one of the newest additions. The doctor controls a flexible catheter using a robotic system, which provides greater stability and reach into the lung’s outermost branches. In a large multicenter study, robotic bronchoscopy successfully reached the target lesion in 99.6% of patients. The diagnostic yield for detecting cancer was about 79%, and the median lesion size was just 19 millimeters, roughly the size of a grape. This is a notable improvement over traditional bronchoscopy for these small, peripheral nodules.
How to Prepare
Preparation is straightforward but important. You’ll be asked to fast for at least 2 hours for clear liquids and 4 hours for light meals before the procedure. If you take blood thinners, your doctor will give you specific instructions well in advance. Warfarin is typically stopped 5 days before any biopsy, and newer oral anticoagulants are stopped at least 2 days prior. Low-dose aspirin can usually be continued. If you’re on stronger antiplatelet medications like clopidogrel, expect to stop those about 5 days beforehand as well.
You’ll also want to arrange a ride home. Sedation affects your coordination and judgment for the rest of the day, so you won’t be cleared to drive.
What Happens During the Procedure
For a flexible bronchoscopy, you’ll typically receive moderate sedation through an IV, often a combination of medications that make you drowsy and relaxed but not fully unconscious. This approach, called monitored anesthesia care, is the most common sedation method. Before the scope goes in, a local anesthetic (usually lidocaine) is applied to your throat and the back of your tongue, either as a gargle or spray, to numb the area and suppress your gag reflex. A nerve block near the voice box may also be used to reduce coughing.
Throughout the procedure, your heart rhythm, blood pressure, oxygen levels, and temperature are continuously monitored. The scope is thin enough to pass alongside your breathing tube if one is in place, or it goes in directly through the nose or mouth. You’ll be breathing on your own in most cases. The whole procedure typically takes 30 to 60 minutes depending on what needs to be done.
Rigid bronchoscopy and more complex interventional procedures require general anesthesia, with medications delivered entirely through an IV rather than inhaled gases, since the open design of the rigid scope makes inhaled anesthesia impractical.
Risks and Complications
Bronchoscopy is considered safe. In a study of over 45,000 procedures, the rate of serious complications was 0.85%, and the mortality rate was 0.01%. The two main risks are bleeding and lung collapse (pneumothorax).
Some amount of bleeding is common when biopsies are taken. About 41% of patients who undergo a biopsy experience some bleeding, but it’s almost always mild and stops on its own. Severe bleeding occurs in roughly 1.5% of biopsy cases. Pneumothorax, where air leaks out of the lung and into the surrounding space, happened in only 0.09% of all procedures in that same study.
Other possible but uncommon issues include a temporary drop in oxygen levels during the procedure, an irregular heartbeat, or a reaction to the sedation medication. Fever can occur in the hours afterward, particularly if a wash sample was taken from the lungs.
Recovery and Aftercare
After the procedure, you’ll be monitored for one to two hours while the sedation wears off. Your throat will feel sore and scratchy, which is normal and usually resolves within a day or two. Gargling with warm salt water or sucking on throat lozenges helps. You should avoid eating or drinking for at least 2 hours, because the numbing medication in your throat takes time to wear off, and swallowing before sensation returns raises the risk of choking.
When you do start eating, go easy. Cold drinks, popsicles, and ice cream are good first choices. Soft foods like yogurt, scrambled eggs, mashed potatoes, and pudding work well after that. Avoid anything sharp or crunchy like chips or raw vegetables, and skip acidic drinks like orange juice, which can sting a raw throat. Most people feel back to normal the following day, though mild hoarseness can linger a bit longer.
Biopsy results, if samples were taken, typically come back within a few days to a week depending on the type of analysis required. Your doctor will schedule a follow-up to discuss findings and any next steps.