The Rinne test is not reliable in distinguishing sensorineural and conductive loss cases of severe unilateral or total sensorineural loss. Recently, its value as a screening test has been questioned. This test and its complement, the Weber test, are quick screening tests and are not a replacement for formal audiometry. For example: "Rinne's test was abnormal in the right ear, with bone conduction greater than air conduction".Ĭombined loss = conductive and sensorineural loss Therefore, some prefer to avoid using the terms "positive" or "negative", and simply state if the test was normal or abnormal. Thus, a "positive" result indicates the healthy state, in contrast to many other medical tests. In this case, that parameter is whether air conduction (AC) is better than bone conduction (BC). Positive or negative in this case means that a certain parameter that was evaluated was present or not. Note that the words positive and negative are used in a somewhat confusing fashion here, as compared to their typical use in medical tests. In an ear with conductive hearing loss, bone conduction (BC) is better than air conduction (AC) In an ear with normal hearing and an ear with sensorineural hearing loss, air conduction (AC) is more than bone conduction (BC) bone conductive hearing loss Īir conduction uses the apparatus of the middle ear ( pinna, eardrum and ossicles) to amplify and direct the sound to the cochlea, whereas bone conduction bypasses some or all of these and allows the sound to be transmitted directly to the inner ear albeit at a reduced volume, or via the bones of the skull to the opposite ear. It is caused by the fact that even though one ear is unable to respond to the test, the other ear can still be stimulated by the bone conduction test (via conducting sound through skull bones to the opposite ear), causing the patient to respond to the tuning fork on mastoid but not when it's placed near the affected ear's air canal.
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