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Collateral vessels in branch retinal vein occlusion
Transactions of the Ophthalmological Societies of the United Kingdom
|April 1, 1982
Summary
Collateral vessel formation in retinal vein occlusions typically appears between 2-8 months. Increased collateralization correlates with failed vein recanalization and longer observation times.
Area of Science:
- Ophthalmology
- Vascular Biology
- Retinal Diseases
Background:
- Retinal vein occlusions (RVOs) can lead to the development of collateral vessels.
- Understanding the natural history and incidence of these collaterals is crucial for managing RVOs.
Purpose of the Study:
- To prospectively document the development and natural history of collateral vessels in patients with RVOs.
- To survey the incidence and associations of collateral formation in a cohort of RVO patients.
Main Methods:
- Prospective follow-up of 18 patients to observe collateral vessel development.
- Cross-sectional examination of 42 patients to assess collateral incidence and associations.
- Data collection included time of appearance, location, and factors influencing collateral formation.
Main Results:
- Collateral vessels appeared between 2 and 8 months post-occlusion.
- Macular vein occlusions showed the highest incidence of collaterals.
- Increased collateral formation was associated with failed recanalization of the occluded vein and longer follow-up time.
Conclusions:
- Collateral vessel formation is a dynamic process in RVOs, appearing within months.
- Factors like macular involvement, failed recanalization, and observation duration influence collateralization.
- Age, obstruction site, and hypertension were not significantly associated with collateral incidence.