Which condition causes the maximum hearing loss?
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
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