[Problems in laser surgery and anesthesia].

Accidental thermal damage in case of explosion and fire caused by laser-surgery is a well-known problem and still not solved. A combination of laser beam, oxygen and inflammable substances are only one aspect. A main problem is the venturi-effect resulting from artificial ventilation under anaesthesia. An incidental observation during one case of endotracheal tube-fire led to some fundamental considerations. With a modified PEEP-ventilation hazard can not be prevented, but limited in its complications.