<prompt> Galles test is used for -OtosclerosisJuvenileangiofibromaNasal polypNone  <response>: Ans. is a i.e., Otosclerosiso See the above explanation.Gelles testo It is a bone conduction test and examines the effect of increased air pressure in ear canal on hearing.o Increased air pressure in the ear canal by Siegles speculum pushes the tympanic membrane and ossicles inwards which raises the intralabyrinthine pressure and causes immobility of basilar membrane and decreased hearing,o However, if ear ossicles are already fixed or disconnected, the pressure cannot be transferred to the inner ear - No change in hearing in this situation.o The base of the vibrating tuning fork is placed on the mastoid process and air pressure in ear canal increased by Siegles speculum.o Interpretation is : -Positive Gelles decreased hearing on increased pressure -Normal or sensorineural hearing loss.Negative Gelles No effect of pressure change in hearing- Disconnected or fixed ossicular chain. 