Chronic otitis media Chunfu dai md ph d Otolaryngology Department Eye Ear Nose and Throat hospital Fudan University
Chronic otitis media Chunfu Dai M.D & Ph. D Otolaryngology Department Eye Ear Nose and Throat Hospital Fudan University
Definition COM: unresolved inflammatory process of the middle ear and mastoid associated with TM perforation, otorrhea and hearing loss
Definition ◼ COM: unresolved inflammatory process of the middle ear and mastoid associated with TM perforation, otorrhea and hearing loss
Etiology Unresolved middle ear infection 1. Uncomplicated inflammatory process of the middle ear may evolve over time to produce persistent effusion and irreversible mucosal change 2. Fluid contains enzymes to alter the mucosal lining of the middle ear, it results in collapse or chronic perforation 3. obstruction of narrow communication between the antrum and the attic the aditus
Etiology ◼ Unresolved middle ear infection. 1. Uncomplicated inflammatory process of the middle ear may evolve over time to produce persistent effusion and irreversible mucosal change 2. Fluid contains enzymes to alter the mucosal lining of the middle ear, it results in collapse or chronic perforation 3. Obstruction of narrow communication between the antrum and the attic, the aditus
Etiology Dysfunction of Eustachian tube Chronic inflammation in nose and pharynx a Dysfunction of immune system
Etiology ◼ Dysfunction of Eustachian tube ◼ Chronic inflammation in nose and pharynx ◼ Dysfunction of immune system
Bacteriology Pseudomonas aeruginosa(40-60%) Staphylococus aureus(10-20%) Anaerobic bacteria
Bacteriology ◼ Pseudomonas aeruginosa (40-60%) ◼ Straphylococus aureus (10-20%) ◼ Anaerobic bacteria