• Five repetitive tympanometric screenings performed during one year in 288 randomized, otherwise healthy 4-year-old children showed that 50% of ears changed tympanogram type between each trial. The total frequency of secretory otitis was high; thus, 32% of all 576 ears had type B at least once and 73% had either type B or C2, indicating a middle ear pressure of −200 mm H2O or lower. At three trials during at least six months, 8% had type B and 24% either type B or C2. spontaneous improvement of secretory otitis was high, and type B improved in 78% to 88% of ears, although in some ears the type again deteriorated. Severe changes of the tympanic membrane were found in 0.5% of ears, and it is therefore advised to postpone surgical treatment of secretory otitis for three to six months.
(Arch Otolaryngol 1982;108:4-10)
Tos M, Holm-Jensen S, Sørensen CH, Mogensen C. Spontaneous Course and Frequency of Secretory Otitis in 4-Year-Old Children. Arch Otolaryngol. 1982;108(1):4–10. doi:10.1001/archotol.1982.00790490006002