Diagnosis | Definition | Severity scale for worse ear. |
---|---|---|
Normal | Absence of middle ear inflammation or infection, normal mobility on pneumatic otoscopy, and type A, C1 or C2 tympanogram. | 0 |
Otitis media with effusion (OME) | Fluid behind an intact tympanic membrane (TM), reduced mobility on pneumatic otoscopy or type B tympanogram, with or without mild bulging, and in the absence of signs or symptoms of acute infection. | 1 |
Acute Otitis Media without perforation (AOMwoP) | Fluid behind an intact TM, reduced mobility on pneumatic otoscopy or type B tympanogram, with moderate or marked bulging, with or without symptoms of acute infection and without signs of recent perforation. | 2 |
AOM with perforation (AOMwiP) | Discharge through a perforated TM for less than 6 weeks. | 3 |
Chronic suppurative otitis media (CSOM) | Discharge through a perforated TM for more than 6 weeks despite appropriate treatment for AOMwiP. | 4 |