RESUMEN
<p><b>OBJECTIVE</b>To study the therapeutic effect of ventilation tube insertion in the middle ear and the external auditory canal on chronic secretory otitis media in children.</p><p><b>METHODS</b>A retrospective study on 30 patients (40 ears) with chronic secretory otitis media and who underwent the operation of middle ear exploration and ventilation tube insertion in the middle ear and the external auditory canal was performed. Poor tympanic membrane, even with adhesion, was seen in 23 ears. Ten patients had evidence of bilateral secretory otitis media. From this group one ear was first injected with drugs (dexamethasone, mucosolvin, etc) and then tube insertion into the auditory tube was performed; the other ear only received drug injections into the auditory tube. The remaining 20 patients who had evidence of unilateral secretory otitis media only received drug injections into the auditory tube.</p><p><b>RESULTS</b>The tubes inserting into the auditory tube all dropped out 5-8 days after operation. None of the ventilation tubes into the middle ear dropped out and the patients' tympanum recovered after the ventilation tubes were removed (6-8 months after operation). The total cure rate was 87.5% (35/40) and the improvement rate was 12.5% (5/40). The operation of inserting tubes into the auditorytube did not improve the therapeutic effects. In the 0.5-2 years postoperative follow-up, middle ear effusions recurred in one ear, and three ears were transferred from type C to type A.</p><p><b>CONCLUSIONS</b>The surgery of ventilation tube insertion in the middle ear and the external auditory canal for chronic secretory otitis media can prevent the tympanic membrane from damage and dropping out of the ventilation tube and reduce recurrence in children. It is a preferred selection for the patients with poor tympanic membrane or adhesive tympanic membrane. It is no use to insert the tube into the auditory tube for the improvement of therapeutic effects.</p>