ArticleClinical ophthalmology (Auckland, N.Z.)2022
Analysis of Lacrimal Duct Morphology from Cone-Beam Computed Tomography Dacryocystography in a Japanese Population.
Article in Clinical ophthalmology (Auckland, N.Z.), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed, 16 citations in OpenAlex.
- Developmental anatomy of the lacrimal sac fossa and nasolacrimal canal: a CT study of paediatric patients.Eye (London, England) · 2026Observational
- Dacryoendoscopy as a frontier technology for lacrimal drainage disorders.Japanese journal of ophthalmology · 2025Review
- Automatic Segmentation of the Nasolacrimal Canal: Application of the nnU-Net v2 Model in CBCT Imaging.Journal of clinical medicine · 2025Article
- Bibliometric and visualized analysis of research hotpots and future prospects in lacrimal duct obstruction disease (1900 to 2024).International journal of ophthalmology · 2025Article
- Article
- Diversity in Lacrimal Pathway Morphology Among Patients with Congenital Nasolacrimal Duct Obstruction.Clinical ophthalmology (Auckland, N.Z.) · 2024Article
- Accuracy of the Lacrimal Syringing Test in Relation to Dacryocystography and Dacryoendoscopy.Clinical ophthalmology (Auckland, N.Z.) · 2023Article
- Dacryoendoscopy: Historical development, philosophical foundation, and clinical perspective.Taiwan journal of ophthalmologyReview
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5 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Purpose: The dacryoendoscope is a practical instrument for the examination and the treatment of lacrimal duct obstruction. Nevertheless, as it is a rigid fiberscope, manipulation of the endoscope is somewhat affected by the patient's lacrimal duct alignment and the skeletal structure of the face. The morphology and inclination of the lacrimal duct vary among individuals and ethnic groups. We aimed to evaluate the alignment of the lacrimal duct from the perspective of endoscopic maneuverability in a Japanese population. Methods: This retrospective study analyzed the cone-beam computed tomography dacryocystography (CBCT-DCG) images of 102 patients diagnosed with unilateral primary acquired nasolacrimal duct obstruction (PANDO) at Ehime University Hospital from December 2015 to May 2021. The following parameters of the lacrimal duct on the contralateral side of unilateral PANDO were investigated: (1) angle formed by the superior orbital rim-internal common punctum-nasolacrimal duct opening, (2) angle formed by the lacrimal sac and the nasolacrimal duct, (3) length of the lacrimal sac, and (4) length of the nasolacrimal duct. Results: Measurements of the above parameters were (1) 10.2° ± 7.8° (range, -11° to +27°), (2) -6.3° ± 14.1° (range, -43° to +40°), (3) 8.9 ± 2.3 mm (range, 4.3-17.1), and (4) 13.2 ± 2.7 mm (range, 5.7-20.7), respectively. The Shapiro-Wilk test demonstrated that the values of all parameters, except (3), followed a normal distribution ( Conclusion: This study reported anthropometric analysis data of the morphology of the lacrimal ducts using CBCT-DCG in a Japanese population. In our cohort, the line from the superior orbital rim through the internal common punctum to the nasolacrimal duct opening inclined anteriorly in 92% of the patients.
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