BT is complete after 3 sessions, each treating a different part of the lung to ensure safety (as Illustrated in the lung map). No incision is needed. BT is performed with a bronchoscope, inserted through the nose or mouth.
During the procedure, the Alair™ catheter delivers radiofrequency (RF) energy to the airway walls, applying mild heat in a controlled manner reducing the amount of excessive airway smooth muscle present in the airways.
It's important to note that no structural changes in the airways that were clinically significant were due to BT at 5 years.2