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KMID : 0360220210620040507
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Journal of the Korean Ophthalmological Society
2021 Volume.62 No. 4 p.507 ~ p.515
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Changes in Retinal Circulation Time after Panretinal Photocoagulation in Patients with Nonproliferative and Proliferative Diabetic Retinopathy
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Sim Ha-Eun
Lee Jeong-Hyun
Park Jae-Yong
Choi Jin
Kang Min-Ji
Hwang Je-Hyung
Kim Jae-Suk
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Abstract
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Purpose: To explore whether panretinal photocoagulation (PRP) improved retinal blood circulation in patients with diabetic retinopathyof various levels of severity based on changes in the retinal circulation time as measured by video fluorescein fundusangiography.
Methods: We recruited patients with severe diabetic retinopathy indicated for PRP; we performed video fluorescein fundus angiographybefore and after PRP. We measured changes in the arterial circulation time (ACT), arteriovenous passage time (APT),and venous filling time (VFT) in patients with diabetic retinopathy of varying severity, and compared the findings. We recordedHbA1c levels and hypertension status.
Results: We enrolled 33 patients, 17 with severe nonproliferative diabetic retinopathy (NPDR) and 16 with early proliferative diabeticretinopathy (PDR). After PRP, neither the ACT nor the APT changed significantly in patients with severe NPDR (p = 0.927,p = 0.138) or early PDR (p = 0.137, p = 0.268). After PRP, the VFT was significantly reduced in patients with both severe NPDR(p = 0.000) and early PDR (p = 0.022). The VFT reductions were similar in both groups (p = 0.217).
Conclusions: In patients with severe NPDR and early PDR, improvements in retinal blood circulation after PRP are reflected byreductions in the VFT evident on video fluorescein fundus angiography. We speculate that the improvements are similar in patientswith severe NPDR and early PDR.
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KEYWORD
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Arteriovenous passage time, Diabetic retinopathy, Fluorescein angiography, Panretinal photocoagulation, Venous filling time
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