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Pulsatile ocular blood flow: changes associated with scleral buckling procedures.
Harumasa Yokota1, Fumihiko Mori, Taiji Nagaoka
1Department of Ophthalmology, Asahikawa Medical College, Asahikawa, Japan.
Japanese Journal of Ophthalmology
|April 20, 2005
Summary
Scleral buckling surgery temporarily reduces ocular blood flow and pulse amplitude. However, these measurements return to normal levels within six months after the procedure.
Area of Science:
- Ophthalmology
- Vascular Physiology
- Retinal Surgery
Background:
- Scleral buckling (SB) is a surgical procedure to repair retinal detachment.
- The impact of SB on ocular hemodynamics, specifically pulse amplitude (PA) and pulsatile ocular blood flow (POBF), requires further investigation.
Purpose of the Study:
- To evaluate changes in PA and POBF following SB surgery.
- To compare ocular blood flow parameters in eyes that underwent SB with control fellow eyes.
Main Methods:
- Retrospective study of 24 patients (average age 52) who had SB for retinal detachment.
- Patients were grouped based on time since surgery: <6 months (n=10) and >6 months (n=14).
- PA and POBF were measured using computerized tonometry and compared between operated and control eyes.
Main Results:
- Within 6 months post-SB, mean PA and POBF were significantly lower in operated eyes compared to controls (P < 0.05).
- After more than 6 months, no significant differences in PA or POBF were observed between SB eyes and control eyes.
- This suggests a transient decrease in choroidal blood flow post-surgery.
Conclusions:
- Scleral buckling leads to a temporary decrease in choroidal blood flow.
- Ocular blood flow parameters, PA and POBF, normalize approximately 6 months after SB surgery.
- The findings support the transient nature of hemodynamic changes after SB.