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Bronchoscopy
A bronchoscopy is used to look inside the lungs and airways. It can help find the cause of symptoms such as coughing, shortness of breath, or bleeding. A pulmonologist, a lung specialist, performs the procedure.
What is a bronchoscopy?
A bronchoscopy is a procedure used to look inside the airway and lungs, which are part of your respiratory system. This is done with a bronchoscope, a thin, flexible tube with a light and a camera on the end.
The bronchoscope is put in your nose or mouth, down your throat, into your trachea (windpipe), and into the airways (bronchi) of your lungs. The images from the camera are viewed on a video monitor. Special tools can be passed through the bronchoscope to take samples or treat problems, if needed.
There are 2 main types of bronchoscopes:
- Flexible bronchoscopes are bendable tubes that can reach deep into the lungs. They’re used to look into the airways and take samples. They are the type of scope used most often.
- Rigid bronchoscopes are straight, firm tubes that don’t reach as deep into the lung. They’re used to treat airway problems, such as blockages and bleeding.
Why might you need a bronchoscopy?
There are a few reasons you might need a bronchoscopy:
Check for lung problems
This test can be used to look for the causes of problems in the airways of the lungs. It might be done because of symptoms you are having. This includes things such as:
- Trouble breathing (shortness of breath)
- Coughing up blood (hemoptysis)
- Wheezing
- Unexplained hoarseness
- Cough that is persistent
- Infection
It also might be done to look at an abnormal area seen on an imaging test, such as an x-ray or CT scan.
Take tissue or fluid samples
Bronchoscopy can be used to collect biopsies or bronchial brushings (small tissues samples) from abnormal areas seen in the bronchial lining or just outside the lymph nodes or lung. The samples are collected by passing special tools through the bronchoscope to remove the tissue.
Samples of fluid, called bronchial washings or bronchioalveolar lavage (BAL) can also be collected using sterile salt water (saline) to rinse the airways and collect fluid.
Once collected, these samples are looked at under a microscope in the lab to check for cancer or infection.
Look at nearby lymph nodes and other structures
Bronchoscopy can be done as part of an endobronchial ultrasound (EBUS) to look at lymph nodes and nearby areas between the lungs.
For this test, a bronchoscope is fitted with a small ultrasound probe on its tip. The ultrasound uses sound waves to create pictures of nearby tissues on a computer screen. If an abnormal area is seen, a hollow needle can be passed through the bronchoscope into these areas to take a sample called a transbronchial needle aspiration (TBNA).
Treat certain lung problems
Bronchoscopy can be used to treat blocked airways or other types of problems in the lung. For example, a small laser on the end of the bronchoscope can remove part of a tumor blocking an airway, or a rigid bronchoscope can be used to place a stent (hard tube) into a narrowed or blocked airway to help keep it open.
What’s it like to have a bronchoscopy?
This is a general outline of what typically happens before, during, and after a bronchoscopy. But your experience might be a little different, depending on why you’re having the test, where you’re having the test done, and your overall health.
Be sure to talk to your doctor before having this test so you understand what to expect. Ask questions if there’s anything you’re not sure about.
Before your bronchoscopy
Be sure your doctor knows about any medicines you are taking, including vitamins, herbs, and supplements, as well as if you have allergies to any medicines.
You might be asked to stop taking blood-thinning medicines, including aspirin, for several days before the test to reduce your risk of bleeding. Your doctor might also ask you to adjust or stop other medicines as well, such as those for diabetes. If you normally take prescription medicines in the morning, talk with your doctor or nurse about how to manage them on the day of your test.
You might be asked not to eat or drink anything for several hours before the procedure. Or you might be told to only drink liquids. Your doctor or nurse will give you specific instructions. Be sure to follow them and to ask questions if there’s anything you don’t understand.
Making a transportation plan
Because a sedative is used to help keep you more comfortable during the procedure, you will need to arrange for a ride home after the test. You might be sleepy or dizzy and need someone to help you get safely into your home, so a cab or rideshare service might not be a good option. Some centers will not allow you to use a cab or rideshare after this procedure.
If transportation or help getting home might be a problem, talk with your health care provider. There might be other resources available, depending on the situation.
During your bronchoscopy
Bronchoscopy can usually be done as an outpatient procedure, where you don’t need to stay overnight in a hospital. Your doctor will review the procedure with you and ask you to sign a consent form.
If you wear dentures, you might be asked to remove them. For this test, you change into a hospital gown and lie on your back on a bed or table with your head raised up slightly.
From there:
- Your blood pressure, heart rate, and breathing will be monitored.
- Your mouth, throat, and possibly your nose will be numbed with a spray or liquid.
- You might get a sedative through an intravenous (IV) line to help you relax, or less often, be asleep (under general anesthesia) for the test.
- A plastic mouthpiece might be used to keep your mouth open and protect your teeth.
The scope will be placed through the nose or mouth. If you are awake, the insertion of the scope might make you cough at first. This will stop as the numbing drug begins to work. The scope will then be passed down your throat into your lungs.
The procedure usually takes about 30 minutes, but it might take longer, depending on what’s being done.
After your bronchoscopy
After the procedure, you will be watched closely for any problems. If you had a sedative, you might not remember the procedure.
If you had the procedure as an outpatient, you should be able to go home after a few hours. If you were given a sedative, someone will need to drive you home and stay with you until it wears off. Your doctor or nurse will give you specific instructions to follow after the test, including when to start taking medicines again that might have been stopped for the procedure.
Your mouth and throat will likely be numb afterwards, so you won't be allowed to eat or drink right away. Once the numbness wears off, you might have a sore throat, cough, or hoarseness for a day or so.
If samples were taken, your results are usually ready within a few days, although some might take longer. You will need to follow up with your doctor after the procedure to get your results.
Possible risks of bronchoscopy
Bronchoscopy is usually safe, but there is a small risk of:
Bleeding: If a biopsy or brushing was done, a small amount of bleeding could happen where the doctor removed tissue samples.
Fever: This is common after the procedure as a result of inflammation. It is usually not a sign of infection and might be more common if bronchial washings were done.
Collapse of part of a lung (pneumothorax): This is rare but can happen after a biopsy or from pressure in the airways during the procedure.
Drug reactions: Sometimes the drugs used to help you relax and stay comfortable during the test can cause changes in blood pressure, confusion, dizziness, trouble breathing on your own, or even an allergic reaction. You will be watched closely for any medicine side effects and they will be treated, if needed.
Your doctor might order a chest x-ray after the bronchoscopy to check for pneumothorax or other lung problems, especially if biopsies were taken. Some problems might go away on their own, but if they’re causing symptoms, such as trouble breathing, they might need to be treated.
Before you go home, your doctor or nurse should give you specific instructions on when you might need to call the doctor’s office for problems. In general, these include:
- Coughing up small amounts of blood
- Cough that is persistent
- Fever that doesn’t go away
- Severe sore throat
- Vomiting
- Wheezing that is unusual for you
Call 911 or go to the emergency room if you have:
- Chest pain or pressure that is increasing
- Trouble breathing (new)
- Coughing up large amounts of blood
Be sure you understand what you should watch out for, the possible timing of when problems might occur, and when you should call for problems.
- Written by
- References
The American Cancer Society medical and editorial content team
Our team is made up of doctors and oncology certified nurses with deep knowledge of cancer care as well as editors and translators with extensive experience in medical writing.
American Thoracic Society. Flexible Bronchoscopy (Airway Endoscopy). Updated December 2020. Accessed at https://www.thoracic.org/patients/patient-resources/resources/flexible-bronchoscopy.pdf on January 28, 2026.
Colt H. Rigid bronchoscopy. UpToDate. 2025. Accessed at https://www.uptodate.com/contents/rigid-bronchoscopy on January 28, 2026.
Criner GJ, Eberhardt R, Fernandez-Bussy, S, et al. Interventional bronchoscopy. American Journal of Respiratory and Critical Care Medicine. 2020; 202 (1), 29-50.
Islam S. Flexible bronchoscopy in adults: Overview. UpToDate. 2025. Accessed at https://www.uptodate.com/contents/flexible-bronchoscopy-in-adults-overview on January 29, 2026.
Islam S. Flexible bronchoscopy in adults: Preparation, procedural technique, and complications. UpToDate. 2025. Accessed at https://www.uptodate.com/contents/flexible-bronchoscopy-in-adults-preparation-procedural-technique-and-complicationson January 29, 2026.
Last Revised: February 11, 2026
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