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Type: Journal article
Title: The orientation of the lacrimal fossa to the bony nasolacrimal canal: an anatomical study
Author: Park, J.
Takahashi, Y.
Nakano, T.
Asamoto, K.
Iwaki, M.
Selva-Nayagam, D.
Leibovitch, I.
Yang, S.
Kakizaki, H.
Citation: Ophthalmic Plastic and Reconstructive Surgery, 2012; 28(6):463-466
Publisher: Lippincott Williams & Wilkins
Issue Date: 2012
ISSN: 0740-9303
Statement of
Juwan Park, Yasuhiro Takahashi, Takashi Nakano, Ken Asamoto, Masayoshi Iwaki, Dinesh Selva, Igal Leibovitch, Suk-Woo Yang, and Hirohiko Kakizaki
Abstract: PURPOSE: To examine the relative positions of the lacrimal fossa (LF) and the bony nasolacrimal canal (BNLC) in relation to each other and a reference plane. METHODS: Forty-two orbits and BNLCs from 21 Asian cadavers (9 men and 12 women; average age at death, 84.4 years; range, 70–99 years) had been fixed in 10% buffered formalin before use. After exposing the LF and the medial half of the BNLC, the authors measured the angles of the longitudinal axis of the LF and the BNLC relative to the aesthetic horizontal plane respectively. Based on these values, the relative orientation of the LF and the BNLC was determined and defined in terms of [DELTA] BNLC-LF. A positive [DELTA] BNLC-LF represents a nasolacrimal canal that descends posteriorly relative to the LF. RESULTS: The mean LF, BNLC, and [DELTA] BNLC-LF were 9.5°, 19.8°, and 10.3°, respectively. In 39 passages (92.9%), the [DELTA] BNLC-LF was positive, representing a nasolacrimal canal that is more posteriorly oriented than the LF. In 3 passages (7.1%), the [DELTA] BNLC-LF was equal to or less than 0°; 2 of them (4.8%) had a straight course and 1 passage (2.4%) had a negative value. CONCLUSIONS: In most patients, the BNLC is directed more posteriorly than the LF. This finding may help in preventing an inadvertent false passage during probing and intubation in patients with epiphora.
Keywords: Orbit
Lacrimal Apparatus
Nasolacrimal Duct
Aged, 80 and over
Rights: © 2012 The American Society of Ophthalmic Plastic and Reconstructive Surgery, Inc.
DOI: 10.1097/IOP.0b013e31826463d9
Appears in Collections:Aurora harvest
Opthalmology & Visual Sciences publications

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