Which condition causes the maximum hearing loss?
Average Hearing loss seen in different lesions of conductive apparatus: Complete obstruction of ear canal = 30dB Perforation of tympanic membrane (it varies and is directly propoional to the size of perforation) = 10-40 dB Ossicular interruption with intact drum = 54 Db Closure of oval window = 60 Db
Ossicular disruption with intact tymnpanic membrane
Disruption of melleus and incus as well tympanic membrane
Paial fixation of the stapes footplate
Otitis media with effusion