Journal
LIFE-BASEL
Volume 13, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/life13020424
Keywords
chronic kidney disease; laser speckle flowgraphy; diabetic retinopathy; blood flow; diabetic nephropathy
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This study investigated the effect of renal dysfunction categorized by CKD stage on retinal microcirculation and artery caliber in diabetic patients. The results showed that diabetic patients with stage 3 CKD had significantly lower MBR and TRFI compared to those without CKD. Multiple regression analysis also demonstrated an independent association between CKD stage and MBR/TRFI. However, there were no significant differences in arterial diameter among the groups.
This study investigated the effect of renal dysfunction categorized by the stage of chronic kidney disease (CKD) on the retinal microcirculation assessed by laser speckle flowgraphy (LSFG) and retinal artery caliber measured by adaptive optics imaging in diabetic patients particularly the early stage of retinopathy and nephropathy. We divided the patients with diabetes into three groups based on the CKD stage (non-CKD (n = 54); CKD stage 1 + 2 (n = 20); CKD stage 3 (n = 41)). The mean blur rate (MBR) of the stage 3 CKD group was significantly lower than that of the no-CKD group (p < 0.015). The total retinal flow index (TRFI) in the stage 3 CKD group was significantly lower than that of the no-CKD group (p < 0.002). Multiple regression analysis demonstrated that CKD stage was independently associated with MBR (beta = -0.257, p = 0.031) and TRFI (beta = -0.316, p = 0.015). No significant differences were observed in external diameter, lumen diameter, wall thickness, and wall to lumen ratio among the groups. These results indicated that the ONH MBR and TRFI as assessed by LSFG decreases in diabetic patients with stage 3 CKD, but the arterial diameter measured by adaptive optics imaging does not change, suggesting that impaired renal function may be associated with decreased retinal blood flow in early-stage diabetic retinopathy.
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