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Ocular circulatory changes following scleral buckling procedures.
A Yoshida1, H Hirokawa, S Ishiko
1Department of Ophthalmology, Asahikawa Medical College, Japan.
The British Journal of Ophthalmology
|September 1, 1992
Summary
Segmental scleral buckling (SB) can reduce ocular blood flow by decreasing ophthalmic artery pressure. The extent of SB treatment correlates with the degree of this reduction, impacting ocular circulation.
Area of Science:
- Ophthalmology
- Ocular Circulation
- Retinal Detachment Surgery
Background:
- Scleral buckling (SB) is a common surgical procedure for rhegmatogenous retinal detachment.
- The impact of SB on ocular hemodynamics, particularly ocular circulation, requires further elucidation.
Purpose of the Study:
- To evaluate the effect of segmental scleral buckling (SB) on ocular circulation.
- To assess the relationship between the extent of SB and changes in ocular hemodynamic parameters.
Main Methods:
- Measurements of ocular pulse amplitude (PA) and ophthalmic artery pressure (OAP) were performed in 24 patients undergoing SB for retinal detachment.
- OAP was defined as the intraocular pressure (IOP) at which PA disappeared during IOP elevation.
- Unoperated fellow eyes served as controls.
Main Results:
- Both OAP and ophthalmic perfusion pressure (OAP minus IOP) significantly decreased with increasing SB treatment area (p < 0.01).
- Postoperative OAP was lower up to 3 months, then stabilized.
- A larger SB area was associated with a greater potential for decreased ocular blood flow.
Conclusions:
- Segmental scleral buckling affects ocular pulse measurements and can reduce ocular blood flow.
- Decreased ophthalmic perfusion pressure, likely due to increased choroidal vascular resistance, is a probable mechanism.
- The extent of SB surgery is a key factor influencing the degree of ocular blood flow reduction.