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T. Kitaoka, K. Mishima; Relationship Between CloquetâTMs Canal and Vitreous Pocket . Invest. Ophthalmol. Vis. Sci. 2005;46(13):4228.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose:Cloquet's canal is the remnant of the primary vitreous with the vessel system and attached anteriorly at the lens and posteriorly at the optic disc. Vitreous pocket is a space just in front of macula. Triamcinolone acetonide (TA) is white granules of steroid hormone and sometimes used for visualization of cortical vitreous. We employed TA to visualize the posterior surfaces of Cloquet's canal and vitreous pocket and to show the relationship between them. Methods:After core vitrectomy in 12 eyes of 12 cases of macular hole, we spread TA into vitreous cavity and visualized the surface of Cloquet's canal and vitreous pocket. The size of posterior surfaces of Cloquet's canal and vitreous pocket were measured. Results:The average size of posterior surface of Cloquet's canal was 1.8+/–0.6 disc diameter (DD). On the other hand, the average size of posterior surface of vitreous pocket was 4.2+/–1.1 DD. In 9 cases, There was a very thin vitreous cortex remnant between Cloquet's canal and vitreous pocket and the size of macular hole was 0.3+/–0.1 DD. In 3 cases, about one–DD vitreous cortex remnant existed between them and the size of macular hole was 0.2+/–0.1 DD. There was no statistical significance. Conclusions:To clarify the etiology of macular hole, it may be important to study the relationship between Cloquet's canal and vitreous pocket. Although there was no statistical significance between the size of macular hole and vitreous cortex remnant, the size of Cloquet's canal and vitreous pocket may influence the etiology of the macular hole.
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