Computed Tomographic Measurements of the External Auditory Canal and the Temporal Bone.
- Author:
Gyo Jun KOO
1
;
Eui Kyung GOH
;
Jun Ho YUN
;
Chang Hun LEE
;
Soo Kweon KOO
;
Sang Hwa LEE
;
Kyung Myung CHON
Author Information
1. Department of Otolaryngology, St. Benedict Hospital, Pusan, Korea. 721yun@hanmail.net
- Publication Type:Original Article
- Keywords:
Computed tomography;
Temporal bone;
External auditory canal
- MeSH:
Cartilage;
Colon, Sigmoid;
Ear;
Ear Canal*;
Ear, External;
Ear, Inner;
Ear, Middle;
Female;
Humans;
Male;
Temporal Bone*
- From:Korean Journal of Otolaryngology - Head and Neck Surgery
2002;45(3):238-244
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND AND OBJECTIVES: High-resolution computed tomography provides an excellent method for examination of the middle ear, inner ear anatomy and pathologic changes in the temporal bones. The purpose of this study was to get various measurements of the external auditory canal and temporal bones, and to compare the changes with age and sex. MATERIALS AND METHOD: The various measurements by CT of the external ear canal of normal 50 ears were done. RESULTS: The obtained results were as follows: 1) In both male and female group, the distance from the medial end of EAC to bony-cartilage junction, the distance from medial end of EAC to the lateral end of cartilage, the distance from the superior wall to the inferior wall (coronal EAC isthmus) and the distance from anterior wall to the posterior wall (axial EAC isthmus) increased significantly with age (p<0.05). 2) Compared with the female group, the male group had longer distance from the posterior tympanic plate to the sinus tympani with age (p<0.05). 3) Compared with male group, the female group had longer distance from the posterior EAC wall to the Sigmoid sinus and from the EAC superior wall to the tegmen tympani with age (p<0.05). 4) In both male and female groups, the anterior and inferior angles increased and the posterior and superior angles decreased with age (p<0.05). CONCLUSION: Computed tomographic evaluation can give us to information to operate external ear, middle ear, and inner ear surgery.
