Journal
JOURNAL OF CLINICAL MEDICINE
Volume 12, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/jcm12072687
Keywords
swept-source optical coherence tomography angiography; type 1 diabetes; FreeStyle Libre; retinal vascular densities; superficial capillary plexus; deep capillary plexus
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This study analyzed retinal vascular parameters in type 1 diabetes patients without diabetic retinopathy using OCT-A and found lower vascular density in the SCP. Additionally, there was a correlation between central vascular density in the DCP and total daily insulin intake, and the use of the FSL device was associated with higher vascular densities in both the SCP and DCP.
Type 1 diabetes is a chronic disease that can lead to vision loss when diabetic retinopathy develops. Retinal microvascular alterations occur before the appearance of clinical signs on a fundus examination. This study aimed to analyze retinal vascular parameters on optical coherence tomography angiography (OCT-A) in patients with type 1 diabetes without diabetic retinopathy in comparison with non-diabetic volunteers. This cross-sectional study was conducted at Dijon University Hospital from 2018 to 2020. Vascular densities were measured using macular OCT-A. In total, 98 diabetes patients and 71 non-diabetic volunteers were enrolled. A statistically significant lower vascular density of the inner circle was found in the superficial capillary plexus (SCP) in the diabetes group (p < 0.01). There was a statistically significant correlation between central vascular density in the deep capillary plexus (DCP) and total daily insulin intake (p = 0.042); furthermore, use of the FreeStyle Libre (FSL) device was associated with higher vascular densities in both the SCP (p = 0.034 for outer circle density) and DCP (p < 0.01 for inner circle density and p = 0.023 for outer circle density). Retinal microvascularization was early-altered in type 1 diabetes, and using the FSL device seemed to preserve retinal microvascularization.
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