Otitis media is inflammation of mucous membrane of middle ear cleft.
It usually occurs in infants & children following viral infection of upper respiratory tract. The disease is going through the following steps-
Oedema & hyperaemia of nasopharyngeal end of eustachian tube.
Blocks the tube.
Leads to absorption of air & negative intratympanic pressure.
Retraction of tympanic membrane with some degree of effusion in middle ear.
Prolonged tubal occlusion
Pyogenic organism invade tympanic cavity.
Hyperaemia of its lining
Inflammatory exudate in the middle ear.
Formation of pus in middle ear & sometimes in the mastoid air cells.
Increase tension on the TM
Pressure necrosis in the Pars tensa leading to small central perforation
Ear starts draining (first serosanguinous & later mucopurulent)
It is due to – 1. Most resistance over takes the virulence of organism. 2. Proper antibiotic therapy.
Dimmunition of cessation of ear discharge.
Subsidence of symptoms
Inflammatory process begins to resolve.
Untreated cases can lead to intracranial & extra cranial complication by- 1) Erosion of bone, 2) Hyperaemic decalcification or thrombo-embolic phenomena.
Earache- Mild to moderate.
1. STAGE 1:
2. STAGE 2:
3. STAGE 3:
4. STAGE 4:
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