This study is concerned with the rate of tympanic membrane perforation following the surgical removal of ventilation tubes. Consideration for inclusion in the study was given to all patients who had ventilation tubes surgically removed between 1982 and 1991 at The Hospital for Sick Children. All patients included in the study were followed for a minimum period of six months. The patients ranged in age from two to 13 years old, with a mean age of 4.7 years. Our study followed 203 ears which met the entry criteria. It was found that there were 21 (10.3%) documented perforations within this study group.