Micro-surgery of the larynx, presents some special anaesthetic problems. Various techniques of anaesthesia, reported in the literature are discussed. The technique of anaesthesia with a smaller endotracheal tube for I.P.P.R. is described in relation to a series of 100 patients managed at AIIMS Hospital. Blood gas studies in 12 patients showed variations which are within normal limits. The anaesthetic technique was satisfactory, the only complication observed, was laryngeal spasm of varying degree in some of the patients during the immediate post-anaesthetic period.