<prompt> Unilateral conductive deafness after head injury is due to all EXCEPT:Dislocation of incudostapedial jointPerforation of tympanic membraneHemotympanumSecretory otitis media  <response>: Otitis media with effusion OME It is also called serous or secretory otitis media SOM or glue ear It is simply a collection of fluid that occurs within the middle ear space due to the negative pressure produced by altered Eustachian tube function. This can occur purely from a viral URI, with no pain or bacterial infection, or it can precede andor follow acute bacterial otitis media. Fluid in the middle ear sometimes causes conductive hearing impairment, but only when it interferes with the normal vibration of the eardrum by sound waves. Over weeks and months, middle ear fluid can become very thick and glue-like thus the name glue ear, which increases the likelihood of its causing conductive hearing impairment. 