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Anatomical background for bony opening in dacryocystorhinostomy Yasuhiro Hamatsu 1 , Yasutaka Gotoh 1 , Marie Sano 1 , Yutaka Tazawa 1 1Dept of Ophthalmol, Iwate Med Univ Sch of Med pp.259-263
Published Date 2002/3/15
DOI https://doi.org/10.11477/mf.1410907625
  • Abstract
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We evaluated the anatomical relationship between the lacrimal fossa and the ethmoidal sinus in order to determine the optimum site of bony opening in dacryocystorhinostomy (DCR). Orbital computed tomography (CT) was performed parallel to the eye-ear plane in 100 patiens prior to DCR. The series comprised 28 males and 72 fe-males. Their age ranged from 45 to 83 years, average 70.6 years. On CT sections, the anteroposterior diameter of the lacrimal fossa at the height of the medial canthus averaged 7.9±1.0 mm. The distance from the anterior lacrimal crest to the anterior extremity of the ethmoidal sinus averaged 3.3±1.7 mm. At the height 5 mm below the medial canthus, these values averaged 8.3±1.1 mm and 5.4±2.6 mm respectively. The findings show that the anterior proximity of the ethmoidal sinus is nearer to the posterior lacrimal crest when the DCR bony opening is located more inferiorly, al-lowing room for backward expansion of the bony opening in DCR surgery.


Copyright © 2002, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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