Clinical Trials Logo

Clinical Trial Summary

Proliferative diabetic retinopathy (PDR) is the most common causes of irreversible blindness in diabetic retinopathy (DR).Although pars plana vitrectomy (PPV) is the cornerstone for treatment of advanced PDR, related postoperative complications such as recurrent VH, NVG, and postoperative fibrovascular proliferation progression may still cause serious visual impairment. Preoperative intravitreal injections of anti-VEGF drugs may represent a new strategy for making vitrectomy safer and more effective for severe PDR.


Clinical Trial Description

Proliferative diabetic retinopathy (PDR) is the most common causes of irreversible blindness in diabetic retinopathy (DR).It is characterized by progressive loss of vision, retinal edema, vitreous hemorrhage (VH), retinal neovascularization, fibrovascular proliferation, tractional retinal detachment (TRD) and neovascular glaucoma (NVG).Although pars plana vitrectomy (PPV) is the cornerstone for treatment of advanced PDR, related postoperative complications such as recurrent VH, NVG, and postoperative fibrovascular proliferation progression may still cause serious visual impairment. It is well known that vascular endothelial growth factor (VEGF) is a leading role of the neovascularization, vascular permeability, and diabetic macular edema.preoperative intravitreal injections of anti-VEGF drugs may represent a new strategy for making vitrectomy safer and more effective for severe PDR.Until now, there are two kinds of anti-VEGF drugs in China, including monoclonal antibodies, like imported drug Ranibizumab, militating by block VEGF-A, and fusion proteins, like domectic drug Conbercept, competitively inhibiting the binding of VEGF with its receptor by blocking multiple targets, VEGF-A, VEGF-B, and placental insulin-like growth factor (PlGF). Studies focusing on the comparison of efficacy between preoperative intravitreal injections of the two drugs for patients with severe PDR undergoing vitrectomy is still limited. Thus, in this study, we aim to carry out a more comprehensive comparison in intraoperative and postoperative aspects on the efficacy and safety between intravitreal ranibizumab injection (IVR) and intravitreal conbercept injection (IVC) before vitrectomy of PDR. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05414149
Study type Interventional
Source Peking University People's Hospital
Contact
Status Completed
Phase N/A
Start date September 1, 2021
Completion date May 31, 2022

See also
  Status Clinical Trial Phase
Recruiting NCT01921192 - Effect of Folic Acid, Vitamin B6 and Vitamin B12 in Diabetic Retinopathy Phase 4
Recruiting NCT01044875 - Trial of Yellow 577 nm Laser Versus Green 532 nm Laser for Proliferative Diabetic Retinopathy N/A
Active, not recruiting NCT00993525 - Intravitreal Ranibizumab For Persistent New Vessels In Diabetic Retinopathy(Inipe Study) Phase 1/Phase 2
Completed NCT01307072 - Compliance to Ophthalmic Follow-up Examinations and Surgical Outcome for Proliferative Diabetic Retinopathy N/A
Completed NCT01758757 - Comparison of Small-gauge Vitrectomy and Conventional Vitrectomy for Proliferative Diabetic Retinopathy N/A
Withdrawn NCT00600236 - HLA and it Relation With the Development of Proliferative Diabetic Retinopathy in Mexican Population Phase 3
Completed NCT05408416 - Comparison of Surgery Outcome Between Preoperative IVR and Intraoperative IVR in PPV for PDR N/A
Not yet recruiting NCT04464694 - Pre-vitrectomy Intravitreal Ranibizumab for Patients With Proliferative Diabetic Retinopathy Combined With Diabetic Macular Edema Phase 4
Not yet recruiting NCT03633266 - Anti-VEGF Instead of Intraoperative PRP in Proliferative Diabetic Retinopathy N/A
Completed NCT03490318 - Effectiveness of Multimodal Imaging for the Evaluation of Retinal Oedema And New vesseLs in Diabetic Retinopathy
Completed NCT01627977 - Association of Lutein, Zeaxanthin and Brilliant Blue in Chromovitrectomy Phase 3
Completed NCT00776763 - Ocular Growth Factors Profile in Proliferative Retinopathies Before and After Intravitreal Bevacizumab Phase 2
Terminated NCT00563043 - Changes in Electroretinogram and Contrast Sensitivity After PASCAL Treatment Phase 4
Completed NCT00682240 - Morphological and Functional Retinal Changes Following Retinal Photocoagulation Phase 4
Terminated NCT00563628 - Changes in Macular Thickness After Patterns Scan Laser Phase 4
Completed NCT00446381 - Effect of Macugen(Pegaptanib)on Surgical Outcomes and VEGF Levels in Diabetic Patients With PDR (Diabetic Retinopathy or CSDME (Macular Edema) N/A
Completed NCT02879422 - Genetic Markers and Proliferative Diabetic Retinopathy N/A
Enrolling by invitation NCT02911311 - Conbercept vs Panretinal Photocoagulation for the Management of Proliferative Diabetic Retinopathy N/A
Recruiting NCT05514925 - Cryoapplication Versus Anti-VEGF Before Diabetic Vitrectomy Phase 4
Completed NCT02858076 - Anti-VEGF vs. Prompt Vitrectomy for VH From PDR Phase 2/Phase 3