Clinical studies on attic retraction.
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概要
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Attic retraction was also observed in 4. 5% of cases without inflammation, but its severity was mild. The incidence of attic retraction in cases of adhesive otitis media was 42. 7% in mild adhesive otitis media (adhesive grade I) and 60. 8% in severe adhesive otitis media (adhesive grade II), both incidences were significantly higher than the incidence of 23.8% in cases of otitis media with effusion. Thus, the incidence of attic retraction increased as the grade of adhesion became severer. In cases of otitis media with effusion, the incidence was significantly higher in the adult group (32.3%) than in the child group (17.4%). In many of the ears with otitis media with effusion, adhesive grade I and chronic otitis media, the severity of attic retraction was mild. There were more cases of milder retraction in the child group than in the adult group. Attic retraction underwent change with time in 2. 8% of cases, and cholesteatoma occurred in 1. 8% of cases. No improvement in attic retraction was achieved by insertion of a ventilation tube. Bilateral attic retraction was observed in 56. 9% of the child group and 30. 2% of the adult group, and the difference was statistically significant. Ear X-ray findings by SchUller's method revealed many ears with poorly developed mastoid cells and poor pneumatization. Good pneumatization was seen in many cases of mild attic retraction. On CT, 18.3% of the cases of attic retraction had no shadow in the middle ear cavity. In all other cases, a shadow was observed in some part of the middle ear cavity. In the operative cases, the presence or absence of attic block coincided with the presence or absence of shadow in the middle ear cavity as shown by CT.
- 一般社団法人 日本耳鼻咽喉科学会の論文