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Vestibular evoked myogenic potentials in patients with superior semicircular canal dehiscence.
The exact anatomical location of the disease process, erosion of the bony boundaries of the middle ear, the status of the ossicular chain, tegmen tympani, sigmoid sinus plate and lateral semicircular canals can be well visualized.
8, 10) Final confirmation of the diagnosis is obtained by high-resolution CT with parasagittal reconstruction of the circumference of the superior semicircular canal.
5) Abnormalities in cochlear height, horizontal semicircular canal bony island width, and vestibular aqueduct width have correlated well with the presence of hearing loss.
The semicircular canal system of the organs of equilibrium.
Posterior semicircular canal dehiscence: Value of VEMP and multidetector CT.
Superior semicircular canal dehiscence (SCD) syndrome is a recently recognized condition that is characterized by varying degrees of sound- or pressure-induced vestibular or auditory symptoms.
The cochlea, semicircular canals, and internal auditory canal were normal.
If the hearing has not improved, you are dealing with cochlear otosclerosis or a semicircular canal dehiscence, and the procedure should be terminated.
Schuknecht proposed that BPPV occurs when otoconia irritate the ampulla of the posterior semicircular canal (the cupulolithiasis theory), but other theories exist, as well.
If a patient has a conductive hearing loss and reflexes are present, obtain computed tomography of the temporal bones to rule out superior semicircular canal dehiscence.