Journal
JOURNAL OF CLINICAL NEUROSCIENCE
Volume 17, Issue 4, Pages 473-478Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jocn.2009.07.121
Keywords
Internal auditory canal; Jugular bulb; Skull base surgery; Temporal bone; Transtemporal approaches
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Although many reports mention a high jugular bulb (HJB), it is often not clearly defined. We examined the relationship between the jugular bulb (JB) and the internal auditory canal (IAC) in 200 temporal bones on high resolution CT scans and alcohol-fixed skull bases of adults. The average distance ( standard deviation) between the IAC and the JB was 7.5 +/- 2.3 mm (range, 1-16 mm). The JB was higher on the right side than its companion in 53.3% of patients (left side only in 22%; no side dominance in 23.7% of bases). When the JB reached or exceeded the floor of the IAC (16.5%), it was defined as a Hp; 61% of HJB were found in females. Bilateral HJB was found in 0.5% of patients. The NIB was not associated with a contralateral fiat JB. Preoperative multiplanar high resolution CT reconstructions make the most detailed assessment of structural topography. (C) 2009 Elsevier Ltd. All rights reserved.
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