Suetake M, Kobayashi T, Takasaka T, Shinkawa H
Department of Otolaryngology, Tohoku University School of Medicine, Sendai, Japan.
Acta Otolaryngol Suppl. 1990;471:73-80. doi: 10.3109/00016489009124813.
Ninety ears (52 patients, aged 3-11 years) affected by secretory otitis media (SOM) were treated by insertion of a ventilation tube (VT). Following VT insertion, the middle ear air volume of these ears was estimated by using an impedance audiometer, at 1, 3, and 6 months postoperatively, and every 6 months thereafter. The middle ear air volume, expressed as the compliance value, increased rapidly for the first 3 months, followed by a gradual increase thereafter. A great difference was observed among the compliance values of ears, ranging from over 10 cc to below 1.5 cc at 6 months, postoperatively. Twelve percent of the ears had compliance values of less than 1.5 cc, and in this group, CT showed opacified and poorly developed mastoid cells. Although the association of upper respiratory disorders such as chronic sinusitis, nasal allergies and cleft palate were found to be more frequent in cases of ears with smaller compliance values, this was not statistically significant. Small compliance values (middle ear air volume) were correlated with the early onset of acute or secretory otitis media, repeated otorrhea after VT insertion and high recurrence rates after the extrusion of the VT.
90只耳朵（52名年龄在3至11岁的患者）患有分泌性中耳炎（SOM），通过插入通气管（VT）进行治疗。在插入VT后，使用阻抗听力计在术后1个月、3个月和6个月以及此后每6个月估计这些耳朵的中耳气量。以顺应性值表示的中耳气量在最初3个月迅速增加，此后逐渐增加。术后6个月时，耳朵的顺应性值差异很大，范围从超过10立方厘米到低于1.5立方厘米。12%的耳朵顺应性值小于1.5立方厘米，在该组中，CT显示乳突细胞混浊且发育不良。尽管在顺应性值较小的耳朵病例中，发现慢性鼻窦炎、鼻过敏和腭裂等上呼吸道疾病的关联更为频繁，但这在统计学上并不显著。小顺应性值（中耳气量）与急性或分泌性中耳炎的早期发作、VT插入后反复耳漏以及VT挤出后的高复发率相关。
