Audit of the incidence of persistent perforation of the tympanic membrane following T-tube removal or extrusion.

Audit of the incidence of persistent perforation of the tympanic membrane following T-tube removal or extrusion was carried out on 100 patients (151 ears). The incidence was found to be 11.9 per cent. This was independent of whether the tube was surgically removed or extruded; of the grade of surgeon carrying out the operation; and whether the patient treatment was carried out privately or on the N.H.S. Changes of practice have resulted from the audit.