Investigation of the Vestibular Aqueduct and the Cochlear Aqueduct by Temboral Bone CT Scan

概要

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The visualization of the vestibular aqueduct and the cochlear aqueduct was investigated by temporal bone CT scan.The vestibular aqueduct was visualized in horizontal CT sections of 70.0% of normal ears, 61.5% of ears with chronic otitis media, 58.3% of ears with combined hearing impairment, 66.7% of ears in cases of sudden deafness, 70.8% of ears of patients with sensorineural hearing impairment without sudden deafness, 71.4% of cases of vertigo without hearing impairment and 12.5% of both diseased and contralateral ears of patients with Menière's disease. Only in Menière's disease was the vestibular aqueduct less visible in the diseased than in the normal ear (P<0.01).The cochlear aqueduct was visible in coronal sections of 50.0% of normal ears, 76.9% of those with chronic otitis media, 58.3% of those with combined hearing impairment, 66.7% of those with sudden deafness 41.7% of those with sensorineural hearing impairment without sudden deafness, 50.0% of the diseased ears of patients with Menière's disease, 37.5% of the contralateral ears of those with Menière's disease and 64.3% of those with vertigo without hearing impairment. Although the cochlear aqueduct was thus highly demonstrable in patients with chronic otitis media or sudden deafness, the difference between the percentage of visualization in these diseased and in normal ears was not statistically significant.
耳鼻咽喉科臨床学会の論文