Between January 1985 and January 1988, 56 patients received radioactive implant therapy of the Eustachian tube with Iridium 192 in the context of tympanoplasty for chronic otitis with tubal dysfunction. After reviewing the method used, we present the results by category of chronic otitis and attempt to propose its indications. Tubal dysfunction was assessed on clinical and otoscopic data and tubal manometry in each patient. A randomised study would appear to be necessary to confirm the interesting results obtained in chronic mucous otitis, in the sequelae of chronic otitis, in evolving retraction pockets and finally for certain manifestly discharging cavities.