Childhood otitis media with effusion

Is Carhart notch an accurate predictor of otitis media with effusion?

“…Some authors believe that tympanometry alone is a useful screening tool and when used as a first test it will reduce the audiometric workload to 69% but still identify 95% of the hearing impaired children. But its failure rate to detect of children with a sensorineural hearing loss is about 0.01-1% [6]. In a study by Sichel et al, there was no association between the viscosity of the middle ear fluid and the characteristics of the B curve [7].…”