I think it is likely that the patient is malingering. The most revealing
test is the unmasked bone conduction in the questionable ear. It should
not have been near the bone line. You did not mention what results you
obtained for tympanometry and acoustic reflex responses.
If this were a longitudinal fracture, one would expect conductive loss
with possible hemotympanum. If transverse, then the SNHL would probably be
far more extreme with strong possibility of dizziness.
I think your supervisor is incorrect. An OAE would be very helpful and
would clear this up in a brief amount of time, given normal tympanograms.
Howard Gutnick, Ph.D.
Atlantic Coast Ear Specialists
Virginia Beach, VA