Rationale: New bronchoscopic treatments for emphysema have shown promise in clinical trials, improving lung function, exercise capacity and possibly survival and are now being adopted by a number of centres in the Netherlands. It is important to ensure that the benefits seen in clinical trials are in fact reflected in clinical practice and that the best use of this early 'real world' experience is made to optimise the development and use of these novel therapies. Overall objective: to develop a national database to record bronchoscopic lung volume reduction procedures for patients with emphysema. This is desirable for audit purposes but will also be an important resource for research both in gathering data and in facilitating collaborations.