Aim of our study an attempt is made to find the utility of three different tuning forks (256,512,1024 Hz) for quantification of conductive hearing loss and their accuracy. Rinne tuning fork tests can be used to diagnose conductive hearing loss. Ideally, 3 tuning forks are used 256, 5 Hz. It is used to assess the person’s hearing acuity. Rinne test, Tuning forks, Conductive hearing loss, Utility Abstractīackground: The Rinne tuning fork test is used routinely in clinical ENT examination. BC at 250 Hz causes more vibration than sound, so test 0.Department of Otorhinolaryngology, Vinayaka Missions Kirupananda Variyar Medical College and Hospitals, Salem, Tamil Nadu, India.Testing involves ascending in 5-dB increments until patient gets 50% responses correct, then descending 10 dB and ascending in 5 dB again.Test to within 5 dB (to account for test–retest variability).Subjectively better-hearing ear tested first.Test order of frequencies 1, 2, 4, 8 kHz then 500 and 250 Hz repeat 1 kHz again to check within 5 dB of first result.Soundproofed facilities needed for definitive/diagnostic testing.A vibrating tuning fork is placed on the midline of the skull.Ī Equal loudness perceived in both ears means symmetrical hearing.ī Lateralization of sound to the affected ear (right) is present in the case of conductive hearing loss.Ĭ In cases of sensorineural hearing loss, the sound is lateralized to the better ear (left).ĭ Correct orientation of the tuning fork. Test performed according to standard protocols (British Society of Audiology)įig.A subjective test of a patient’s hearing compared with an established “normal”.Present two tuning forks, but one to “deaf” ear closer if genuine will hear fork in good ear, if “fake” will only be aware of sound in “deaf” ear so will deny hearing anythingĮquivalent test can be performed with audiometer Relies on fact that if pure tones of same frequency but different intensities are presented simultaneously to each ear, patient will only be aware of the louder stimulus Test less sensitive than Weber for ABG 20 dB, sensitivity 50 to 70%, specificity ~95% for ABG 40 dB, sensitivity and specificity ~95%Ĭan help detect patient with a nonorganic unilateral HL In dead ear get false negative due to transcranial stimulation of nontest ear hence need to mask (e.g., with Barany box) Negative when BC > AC (conductive loss in test ear) Positive when air conduction (AC) > bone conduction (BC) i.e., normal ears or SNHL in test ear Hold tuning fork next to ear, then onto mastoid process-which sound is heard loudest? (Originally described as fork held next to ear until no longer heard, then see if heard via bone) With unilateral or asymmetric HL if conductive localizes to affected ear, if sensorineural localizes to nonaffected earĬan detect as little as a 5 dB loss, but error rate up to 25%
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