Relationship of preoperative findings and ossicular discontinuity in XXXX .

@entity1 @entity3540 @entity2172
BACKGROUND: Ossicular discontinuity may result from @entity2172 , with or without @entity3540 , and usually cannot be determined unless an operation is performed. If preoperative information can be used to determine whether or not the ossicular chain is intact, the @entity1 can be better informed and the surgeon can be better prepared before surgery. OBJECTIVE: To examine the correlation between preoperative findings and the status of the ossicular chain at surgery. STUDY DESIGN: Retrospective. SETTING: A tertiary referral center. @entity1 : Data from 190 @entity1 (212 ears) who were undergoing their first operations for @entity2172 were reviewed. INTERVENTION: The operations for the @entity3540 or noncholesteatoma ears were classified into different groups and analyzed separately. Ossicular discontinuity was identified only if the discontinuity of the ossicular chain was confirmed at the time of operation. RESULTS: The @entity3540 group consisted of 59 ears, and the noncholesteatoma group contained 153 ears. In the @entity3540 group, two statistically significant preoperative parameters were observed to be significantly correlated with ossicular discontinuity: persistently draining ears (p = 0.026) and a @entity3540 that extended to the tympanic sinus (p = 0.006). In the noncholesteatoma group, only one parameter was observed to be predictive of ossicular discontinuity. In this group of @entity1 , perforation of the tympanic membrane with an edge adherent to the promontory occurred significantly more frequently in @entity1 with ossicular discontinuity (p = 0.004) than in those with intact ossicular chains. Surprisingly, an air-bone gap was not significantly correlated with ossicular discontinuity. The @entity3540 and granulation tissue in the @entity2172 may serve as transmission bridges of acoustic energy, resulting in narrowed air-bone gaps. CONCLUSIONS: In the @entity3540 group, both @entity3540 extension into the tympanic sinus and persistently draining ears were predictive of ossicular discontinuity. In the noncholesteatoma group, perforation edges adhering to the promontory also revealed a higher incidence of ossicular discontinuity. Therefore, all these findings can be considered as potential preoperative predictors of ossicular discontinuity in @entity2172 .
