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A randomised prospective study of outpatient haemodilution for central retinal vein obstruction
A P Luckie1, J J Wroblewski, P Hamilton
1Moorfields Eye Hospital, London.
Insights
Haemodilution (HD) for central retinal vein obstruction (CRVO) did not improve visual acuity and increased deterioration risk. This study contradicts previous findings on HD efficacy for CRVO patients.
Area of Science:
- Ophthalmology
- Vascular Medicine
Background:
- Central retinal vein obstruction (CRVO) is a leading cause of vision loss.
- Current treatments for CRVO have varying efficacy and potential side effects.
Purpose of the Study:
- To prospectively evaluate the effectiveness of an outpatient haemodilution (HD) regimen for patients with CRVO.
- To assess the impact of HD on visual acuity and the incidence of rubeosis iridis in CRVO.
Main Methods:
- A prospective study involving 59 patients with CRVO diagnosed within three months and visual acuity (VA) worse than or equal to 6/9.5.
- Thirty patients received HD (target packed cell volume <0.35) for 12 weeks, while 29 served as controls.
- Follow-up was conducted for six months to monitor VA and ocular complications.
Main Results:
- No significant difference in the incidence of VA improvement (P = 0.708) or rubeosis iridis (P = 0.619) was observed between the HD and control groups.
- The incidence of VA deterioration was 5.315 times higher in the HD group compared to controls (P = 0.035).
Conclusions:
- The findings do not support previous studies suggesting haemodilution is beneficial for CRVO.
- Outpatient haemodilution may increase the risk of visual acuity deterioration in CRVO patients.
Purpose:
Central retinal vein obstruction (CRVO) has significant visual morbidity. We prospectively evaluated an outpatient haemodilution (HD) regimen for CRVO.
Methods:
We recruited 59 patients with CRVO of less than three months' duration and visual acuity (VA) worse than or equal to 6/9.5. Thirty patients underwent HD (packed cell volume of <0.35, 12 weeks); there were 29 controls and follow-up was for six months.
Results:
Incidence rates for VA improvement (P = 0.708) and rubeosis iridis (P = 0.619) between the two groups were not different. The incidence rate of VA deterioration was 5.315 times higher with HD (P = 0.035, Cox Proportional analysis).
Conclusion:
This data does not support the previous studies on haemodilution.