AIMS To study the effects of segmental scleral buckling and encircling procedures on tissue circulation in the human optic nerve head (ONH) and choroid and retina.
METHODS Using the laser speckle method, the normalised blur (NB) value, a quantitative index of tissue blood velocity, was measured every 0.125 seconds and averaged over three pulses in the optic nerve head (NBONH) and choroid and retina (NBch-ret) in 10 patients with unilateral rhegmatogenous retinal detachment (mean age 52 (SD 17)). NBONH, NBch-ret, and intraocular pressure (IOP) in both eyes, and blood pressure (BP) were measured before, and 1, 4, and 12 weeks after the scleral buckling and encircling procedure.
RESULTS NBch-reton the buckled side was significantly reduced after surgery and smaller than that in the unoperated contralateral eye throughout the study period (ANOVA, p<0.0001). NBch-ret on the unbuckled side, in the foveal area, NBONH, IOP, and BP showed no significant change.
CONCLUSIONS It was indicated that the segmental scleral buckling procedure with encircling elements decreased tissue blood velocity in the choroid and retina on the buckled side but caused no significant change on tissue circulation in other areas of the fundus or ONH.
- scleral buckling
- encircling procedures
- optic nerve head circulation
- retinochoroidal circulation
- laser speckle method
Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.