30/45 degree otoendoscopy are useful in the assessment of CSOM. Its indications include to ascertain ossicular continuity, presence of adhesions, tympanosclerosis, and to look for potential residual focus of infection
prior to myringoplasty.
This image shows the the presence of mucopus from posterosuperior compartment of the middle ear and filling the round window niche. The discharge is very likely arising from the aditus after it exits mastoid reservoir.
Blob of mucopus occluding eustachan tube opening (circle).
1- handle or malleus tip, 2- round window niche.
30 degree otoendoscopy showing anterior hypotympanum of the right middle
ear cavity focusing at eustachian tube opening (star). White dots indicates
remnant of tympanic annulus of the eardrum in near-total perforation.