Bronchoscopy is generally a safe and well-tolerated procedure, but as with any medical procedure, there are potential risks and complications associated with it. Some of the potential risks and complications include:

1. Bleeding: Bronchoscopy can cause bleeding from the site where the biopsy or brushings were taken. This is usually minor and stops on its own, but in rare cases, additional treatment may be necessary.
2. Infection: There is a small risk of infection associated with bronchoscopy, particularly if bacteria from the mouth or throat enter the lungs during the procedure. Antibiotics may be given before or after the procedure to help reduce this risk.
3. Lung collapse: In rare cases, the insertion of the bronchoscope can cause a small amount of air to leak into the space between the lung and chest wall, leading to a partial lung collapse.
4. Allergic reaction: Rarely, patients may have an allergic reaction to the medication used during the procedure, such as the anesthetic or sedative.
5. Respiratory distress: Bronchoscopy can temporarily cause breathing difficulties or wheezing, particularly in patients with pre-existing lung disease.
6. Cardiac complications: In rare cases, bronchoscopy can lead to changes in heart rate or rhythm, particularly in patients with pre-existing heart disease.

Overall, while complications are rare, it is important to discuss the potential risks and benefits of the procedure with your doctor before the procedure. Your doctor can help determine whether a bronchoscopy is an appropriate diagnostic or therapeutic tool for your specific condition.