Radiologic Analysis of High Jugular Bulb by Computed Tomography

• DOI: 10.1097/mao.0b013e318259b6e7
• Publication Date: 2012-06-19T18:17:45Z
• Authors: Chang-Ki Woo; Chan-Eun Wie; Sung-Hwan Park; Soo-Keun Kong; Il-Woo Lee; Eui-Kyung Goh
• Keywords: Adult; Aged, 80 and over; Male; Adolescent; Ear, Middle; Temporal Bone; Middle Aged; Semicircular Canals; Cochlea; 3. Good health; Radiography; 03 medical and health sciences; 0302 clinical medicine; Humans; Female; Child; Aged

Many previous studies of high jugular bulb (HJB) have limitations, such as focusing simply on the incidence or having a relatively small number subjects. The objective this article was to investigate overall HJB and bony dehiscence in large scale using high-resolution temporal bone computed tomography. other purpose measure horizontal distance from tympanic annulus height above annulus. next step classify HJBs according relative levels compared with surrounding structures.Temporal tomographic images January 2005 April 2010 at Pusan National University Hospital, tertiary care center, were reviewed retrospectively. Exclusion criteria patients younger than 10 years, previously operated ear, cholesteatoma destruction, adhesive otitis media unclear position membrane, congenital anomalies ear. We investigated HJB, distance, vertical classified relation neighboring structures. used cochlear basal turn lateral semicircular canal for classification because they readily seen most cases: group A, inferior membrane below turn; B, canal; C, canal.Total 2,299 cases (4,598 ears) finally examined. study consisted 1025 male 1,274 female patients, aged 11 90 years (mean, 48.0 yr). Of 298 (13.0%) had HJB. observed 435 (9.5%) 4598 ears. more prominent right (right:left = 1.88:1; p < 0.01). cases, 121 (27.8%) dehiscence. also 2.03:1; average between 2.2 ± 1.8 mm. contact 47 ears (47/435, 10.8%). 59.1 27.4 In classification, B common (62.1%).A meaningful proportion membrane. planning ear surgery interventions, physicians should keep mind possibility its dehiscence, which can lead inadvertent injuries.