Postoperative empyema and bronchopleural fistula are well known complications after surgery for pulmonary hydatid disease. The pneumonostomy technique of deliberately creating a bronchoatmospheric fistula after removal of the parasite has been used to prevent these complications. This technique, however, is an added anaesthetic challenge, especially if the child presents again for surgery before this fistula has healed. We describe the anaesthetic management of such a case where controlled increase of the resistance to the air leak via the fistula during intermittent positive pressure ventilation helped circumvent these problems.