Document Detail

The orientation of the lacrimal fossa to the bony nasolacrimal canal: an anatomical study.
MedLine Citation:
PMID:  23034686     Owner:  NLM     Status:  MEDLINE    
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 Δ BNLC-LF. A positive Δ BNLC-LF represents a nasolacrimal canal that descends posteriorly relative to the LF.
RESULTS: The mean LF, BNLC, and Δ BNLC-LF were 9.5°, 19.8°, and 10.3°, respectively. In 39 passages (92.9%), the Δ BNLC-LF was positive, representing a nasolacrimal canal that is more posteriorly oriented than the LF. In 3 passages (7.1%), the Δ 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.
Juwan Park; Yasuhiro Takahashi; Takashi Nakano; Ken Asamoto; Masayoshi Iwaki; Dinesh Selva; Igal Leibovitch; Suk-Woo Yang; Hirohiko Kakizaki
Related Documents :
23842846 - Long-term results of a randomized trial comparing three different devices for percutane...
6349676 - On-lay lamellar keratoplasty for the treatment of keratoconus.
19727566 - Association of systemic steroids and mycophenolate mofetil as rescue therapy for uveiti...
14609826 - Presbyopic phacovitrectomy.
19139846 - Predicting range of movement after knee replacement: the importance of posterior condyl...
2205306 - A phase i/ii trial of recombinant granulocyte-macrophage colony-stimulating factor for ...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ophthalmic plastic and reconstructive surgery     Volume:  28     ISSN:  1537-2677     ISO Abbreviation:  Ophthal Plast Reconstr Surg     Publication Date:    2012 Nov-Dec
Date Detail:
Created Date:  2012-11-09     Completed Date:  2013-03-08     Revised Date:  2013-05-08    
Medline Journal Info:
Nlm Unique ID:  8508431     Medline TA:  Ophthal Plast Reconstr Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  463-6     Citation Subset:  IM    
Department of Ophthalmology and Visual Science, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Aged, 80 and over
Asian Continental Ancestry Group
Lacrimal Apparatus / anatomy & histology*
Nasolacrimal Duct / anatomy & histology*
Orbit / anatomy & histology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Primary adenoid cystic carcinoma of the orbital apex.
Next Document:  Primary Subconjunctival Ganglioneuroma.