J Korean Ophthalmol Soc.  2013 Aug;54(8):1248-1254.

Clinical Features According to the Occlusion Site in Patients with Branch Retinal Vein Occlusion

• Park KH
• Choi KS

Abstract

PURPOSE
To evaluate clinical patterns according to the occlusion site in patients with branch retinal vein occlusion.
METHODS
Ninety-one branch retinal vein occlusion patients were divided into 4 groups according to the occlusion site based on the description by Duke-Elder and Wybar: Papillary retinal vein occlusion group (group A), main retinal vein occlusion group (group B), minor retinal vein occlusion group (group C), and retinal venule occlusion group (group D). The following factors were analyzed retrospectively: baseline/final visual acuity, visual improvement, macular thickness, and macular circulatory states.
RESULTS
The macular thickness (microm) was 575.33 +/- 178.44 in group A, 511.92 +/- 218.02 in group B, 397.21 +/- 144.51 in group C, and 336.68 +/- 120.55 in group D. The retinal ischemic area (DD) was 22.00 +/- 13.28 in group A, 18.26 +/- 10.12 in group B, 12.52 +/- 10.52 in group C, and 12.36 +/- 11.92 in group D, which was found to be significantly greater in the group with the higher branch occlusion site (p < 0.05). However, visual acuity, macular circulatory states and other clinical characteristics were not significantly different.
CONCLUSIONS
Occlusion site is a relating factor for retinal ischemic area and macular thickness in patients with Branch retinal vein occlussion, but which is not a prognostic factor for final visual acuity.

Keyword

Branch retinal vein occlusion; Occlusion site

MeSH Terms

Humans
Retinal Vein
Retinal Vein Occlusion
Retinaldehyde
Venules
Visual Acuity
Retinaldehyde

Figure

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  Figure 1. Four sites of occlusion defined in this study based on the description by Duke-Elder and Wybar.13 (a) papillary vein; (b) major retinal vein; (c) minor retinal vein; (d) retinal venule.

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  Figure 2. Comparison of baseline visual acuity (A), final visual acuity (B), retinal ischemic area (C) and macular thickness (D) among the four groups which were divided by occlusion site in the branch retinal vein occlusion patients. DD = disc diameter; log MAR = logarithm of the minimal angle of resolution. * Statistical significance was found with ANOVA, Scheffe test (p < 0.05).

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