Severe Proliferative Diabetic Retinopathy

2014-07-23 21:09:21 | BioPortfolio


The purpose of this study is to examine and compare, prospectively, best corrected visual acuity (BCVA) outcomes and complications of a cohort of patients with Proliferative Diabetic Retinopathy and Tractional Retinal Detachment not involving macula undergoing pars plana vitrectomy (PPV) or conventional management (panretinal photocoagulation).


The utility and practice of Panretinalphotocoagualtion (PRP) in patients with high-risk Proliferative Diabetic Retinopathy (PDR) have not changed since the ETDRS reported guidelines in 1987. A meta-analysis of the DRS and ETDRS two large U.S. RCT of laser therapy for PDR confirmed the effectiveness of PRP (Level I evidence). Both trials had large sample sizes, excellent compliance and adequate follow-up. These studies established that PRP reduces the risk of severe visual loss in patients with high-risk PDR by 50% to 60%20.

With the arrival of the vitrectomy, this surgery was often used to treat eyes with severe complications from PDR. The most common indications for vitrectomy were nonclearing vitreous hemorrhage, Tractional Retinal Detachment(TRD) with macular involvement, and combined traction and rhegmatogenous retinal detachment. With the addition of new indications to the known indications vitrectomy has been performed in earlier stages(severe PDR). A large number of case series reports have assessed the effect of pars plana vitrectomy on diabetic TRD with or without macular detachment but the level of evidence was low and they included patients not homogeneous. These studies have generally shown benefit, with improved vision seen in many patients (ranging from 22% to 65%) but they have also indicated a high rate of operative and postoperative complications. These numerous intra and post-operative complications could lead to satisfying anatomical results but poor vision.The purpose of this study is to examine and compare, prospectively, best corrected visual acuity (BCVA) outcomes and complications of a cohort of patients with Proliferative Diabetic Retinopathy and Tractional Retinal Detachment not involving macula undergoing pars plana vitrectomy (PPV) or conventional management (panretinal photocoagulation)

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment


Diabetic Retinopathy


vitrectomy, panretinalphotocoagulation


1Department of Medicine and Surgery, Section of Ophthalmology, Santa Marta Hospital, University of Catania, Italy




Universita degli Studi di Catania

Results (where available)

View Results


Published on BioPortfolio: 2014-07-23T21:09:21-0400

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Comparison of Interval Variation and Dosage in Preoperative Bevacizumab Administration in Proliferative Diabetic Retinopathy Patients Undergoing Vitrectomy

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Safety and Efficacy of Intravitreal Ranibizumab as a Preoperative Adjunct Treatment Before Vitrectomy Surgery in Proliferative Diabetic Retinopathy (PDR) Compared to Standard Vitrectomy Alone

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PubMed Articles [1695 Associated PubMed Articles listed on BioPortfolio]

Postoperative Complications of Pars Plana Vitrectomy for Diabetic Retinal Disease.

Despite recent advances in the medical management of diabetic retinal disease, there remain established indications for vitreoretinal surgery in the treatment of severe proliferative diabetic retinopa...

Analysis of the Cochrane Review: Anti-vascular Endothelial Growth Factor for Prevention of Postoperative Vitreous Cavity Hemorrhage after Vitrectomy for Proliferative Diabetic Retinopathy. Cochrane Database Syst Rev. 2015;8:CD008214.

Postoperative vitreous hemorrhage is a complication following vitrectomy for proliferative diabetic retinopathy, delaying visual recovery and making fundus examination and disease follow-up more diffi...

Vitreous Fibronectin and Fibrinogen Expression Increased in Eyes With Proliferative Diabetic Retinopathy After Intravitreal Anti-VEGF Therapy.

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To explore the risk factors of diabetic retinopathy (DR) and sight-threatening diabetic retinopathy (STDR) among Chinese patients with diabetes.

Vitrectomy technique in aggressive posterior retinopathy of prematurity.

to develop the methodology of early primary vitrectomy for aggressive posterior retinopathy of prematurity.

Medical and Biotech [MESH] Definitions

Removal of the whole or part of the vitreous body in treating endophthalmitis, diabetic retinopathy, retinal detachment, intraocular foreign bodies, and some types of glaucoma.

A drug used to reduce hemorrhage in diabetic retinopathy.

Disease of the RETINA as a complication of DIABETES MELLITUS. It is characterized by the progressive microvascular complications, such as ANEURYSM, interretinal EDEMA, and intraocular PATHOLOGIC NEOVASCULARIZATION.

Aneurysm of the MICROVASCULATURE. Charcot–Bouchard aneurysms are aneurysms of the brain vasculature which is a common cause of CEREBRAL HEMORRHAGE. Retinal microaneurysm is an early diagnostic sign of DIABETIC RETINOPATHY.

Vision considered to be inferior to normal vision as represented by accepted standards of acuity, field of vision, or motility. Low vision generally refers to visual disorders that are caused by diseases that cannot be corrected by refraction (e.g., MACULAR DEGENERATION; RETINITIS PIGMENTOSA; DIABETIC RETINOPATHY, etc.).

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Diabetes is a lifelong condition that causes a person's blood sugar level to become too high. The two main types of diabetes are: type 1 diabetes type 2 diabetes In the UK, diabetes affects approximately 2.9 million people. There are a...

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