Comparison of Surgery Outcome Between Preoperative IVR and Intraoperative IVR in PPV for PDR

Proliferative Diabetic Retinopathy Clinical Trial

Official title:

Comparison of Surgery Outcome Between Preoperative and Intraoperative Intravitreal Injection of Ranibizumab for Vitrectomy in Proliferative Diabetic Retinopathy Patients

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT05408416
• Other study ID #: PekingUPHJinfeng Qu
• Status: Completed
• Phase: N/A
• Start date: September 1, 2021
• Est. completion date: May 29, 2022

Study information

• Verified date: June 2022
• Source: Peking University People's Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Proliferative diabetic retinopathy (PDR) is the most common causes of irreversible blindness in diabetic retinopathy (DR).Intravitreal injection of anti-VEGF drugs is a good adjunct to vitreous surgery for severe PDR. Some studies have confirmed that the application of anti-VEGF drugs before vitrectomy for PDR patients can reduce the difficulty of surgery and improve postoperative best corrected visual acuity (BCVA), but very few researches focused on the injections of anti-VEGF during surgery.Therefore, investigators carry out this clinical trial to compare the effects of preoperative and intraoperative intravitreal injections of ranibizumab (IVR) on vitrectomy outcomes for PDR patients.One group receive ranibizumab injection (0.5mg/0.05ml) 3-5 days before vitrectomy. Another group receive ranibizumab injection (0.5mg/0.05ml) at the end of vitrectomy. Intraoperative and postoperative indices are collected for further comparison.Investigators enroll PDR patients whose baseline characteristics including age, sex, BMI, type of diabetes, HbA1c level, duration of DM, hypertension, previous history of laser photocoagulation, status of lens, indication for surgery, baseline BCVA, IOP, baseline CRT and extent of VAG are comparable.The enrolled eyes are randomly assigned according to the Central Randomization System with a ratio of 1:1 to preoperative IVR group and intraoperative IVR group. Intraoperative including surgery time, intraoperative bleeding, intraocular electrocoagulation use, iatrogenic retinal breaks, relaxing retinotomy and silicone oil tamponade, and postoperative indices including postoperative best-corrected visual acuity (BCVA), central retinal thickness (CRT), postoperative vitreous hemorrhage (VH), neovascular glaucoma (NVG), recurrent retinal detachment, postoperative fibrovascular proliferation progression and reoperationare collected for further comparison.

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 progressive fibrovascular proliferation 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.Intravitreal injection of anti-VEGF drugs before or during PPV maybe a good adjunct to vitreous surgery for severe PDR. Some studies have confirmed that the application of anti-VEGF drugs before vitrectomy for PDR patients can reduce the difficulty of surgery and improve postoperative best corrected visual acuity (BCVA),but very few researches focused on the injections of anti-VEGF during surgery.Therefore, investigators carried out this study to compare the effects of preoperative and intraoperative intravitreal injections of ranibizumab (IVR) on vitrectomy outcomes for PDR patients.Investigators enroll PDR patients whose baseline characteristics including age, sex, BMI, type of diabetes, HbA1c level, duration of DM, hypertension, previous history of laser photocoagulation, status of lens, indication for surgery, baseline BCVA, IOP, baseline CRT and extent of VAG are comparable.The enrolled eyes are randomly assigned according to the Central Randomization System with a ratio of 1:1 to preoperative IVR group and intraoperative IVR group. Intraoperative and postoperative indices are collected for further comparison. Intraoperative indices including surgery time, intraoperative bleeding, intraocular electrocoagulation use, iatrogenic retinal breaks, relaxing retinotomy and silicone oil tamponade. Investigators compare whether there are statistical differences in the above indicators between the two groups. Meanwhile, postoperative indices are collected during 1week, 1 month, 3 month follow-up, including best-corrected visual acuity (BCVA), central retinal thickness (CRT), postoperative vitreous hemorrhage (VH), neovascular glaucoma (NVG), recurrent retinal detachment, postoperative fibrovascular proliferation progression and reoperation. Investigators compare whether there are statistical differences in the above indicators between the two groups at different visit time.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 102
• Est. completion date: May 29, 2022
• Est. primary completion date: May 29, 2022
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• patients aged 18 years or more with type 1 or 2 diabetes who were clinically diagnosed with PDR;
• persistent VH for more than 1 month or recurrent VH with or without panretinal photocoagulation (PRP);
• TRD detected by indirect ophthalmoscope or B-scan ultrasonography.

Exclusion Criteria:

• previous vitrectomy or intravitreal injection in the study eyes;
• eyes with any ocular disease that may hinder visual improvement other than PDR, such as optic atrophy or macular hole;
• poor control of diabetes mellitus (DM) with hemoglobin A1c (HbA1c) > 12%;
• history of thromboembolic events (including cerebral vascular infarctions or myocardial infarctions) or coagulation system disorders or receiving anticoagulant or antiplatelet therapy;
• eyes given gas tamponade or additional treatment during follow-up periods.

Related Conditions & MeSH terms

• Diabetic Retinopathy
• Proliferative Diabetic Retinopathy
• Retinal Diseases

Intervention

Procedure:
• preoperative group and intraoperative group
ranibizumab injection (0.5mg/0.05ml) 3-5 days before vitrectomy or ranibizumab injection (0.5mg/0.05ml) at the end of vitrectomy

Locations

Country	Name	City	State
China	People's Hospital of Peking University	Beijing	Beijing

Sponsors (1)

Lead Sponsor	Collaborator
Peking University People's Hospital

Country where clinical trial is conducted

China, 

References & Publications (10)

Bressler SB, Qin H, Melia M, Bressler NM, Beck RW, Chan CK, Grover S, Miller DG; Diabetic Retinopathy Clinical Research Network. Exploratory analysis of the effect of intravitreal ranibizumab or triamcinolone on worsening of diabetic retinopathy in a randomized clinical trial. JAMA Ophthalmol. 2013 Aug;131(8):1033-40. doi: 10.1001/jamaophthalmol.2013.4154. — View Citation

Comyn O, Wickham L, Charteris DG, Sullivan PM, Ezra E, Gregor Z, Aylward GW, da Cruz L, Fabinyi D, Peto T, Restori M, Xing W, Bunce C, Hykin PG, Bainbridge JW. Ranibizumab pretreatment in diabetic vitrectomy: a pilot randomised controlled trial (the RaDiVit study). Eye (Lond). 2017 Sep;31(9):1253-1258. doi: 10.1038/eye.2017.75. Epub 2017 May 12. — View Citation

di Lauro R, De Ruggiero P, di Lauro R, di Lauro MT, Romano MR. Intravitreal bevacizumab for surgical treatment of severe proliferative diabetic retinopathy. Graefes Arch Clin Exp Ophthalmol. 2010 Jun;248(6):785-91. doi: 10.1007/s00417-010-1303-3. Epub 2010 Feb 5. — View Citation

Ehrlich R, Harris A, Ciulla TA, Kheradiya N, Winston DM, Wirostko B. Diabetic macular oedema: physical, physiological and molecular factors contribute to this pathological process. Acta Ophthalmol. 2010 May;88(3):279-91. doi: 10.1111/j.1755-3768.2008.01501.x. Epub 2010 Mar 11. Review. — View Citation

Ferenchak K, Duval R, Cohen JA, MacCumber MW. Intravitreal bevacizumab for postoperative recurrent vitreous hemorrhage after vitrectomy for proliferative diabetic retinopathy. Retina. 2014 Jun;34(6):1177-81. doi: 10.1097/IAE.0000000000000058. — View Citation

He YN, Zhao WH, Bai GY, Fang YH, Zhang J, Yang XG, Ding GG. [Relationship between meat consumption and metabolic syndrome in adults in China]. Zhonghua Liu Xing Bing Xue Za Zhi. 2018 Jul 10;39(7):892-897. doi: 10.3760/cma.j.issn.0254-6450.2018.07.006. Chinese. — View Citation

Ren X, Bu S, Zhang X, Jiang Y, Tan L, Zhang H, Li X. Safety and efficacy of intravitreal conbercept injection after vitrectomy for the treatment of proliferative diabetic retinopathy. Eye (Lond). 2019 Jul;33(7):1177-1183. doi: 10.1038/s41433-019-0396-0. Epub 2019 Mar 14. — View Citation

Simunovic MP, Maberley DA. ANTI-VASCULAR ENDOTHELIAL GROWTH FACTOR THERAPY FOR PROLIFERATIVE DIABETIC RETINOPATHY: A Systematic Review and Meta-Analysis. Retina. 2015 Oct;35(10):1931-42. doi: 10.1097/IAE.0000000000000723. Review. — View Citation

Tseng VL, Greenberg PB, Scott IU, Anderson KL. Compliance with the American Academy of Ophthalmology Preferred Practice Pattern for Diabetic Retinopathy in a resident ophthalmology clinic. Retina. 2010 May;30(5):787-94. doi: 10.1097/IAE.0b013e3181cd47a2. — View Citation

Wang X, Wang G, Wang Y. Intravitreous vascular endothelial growth factor and hypoxia-inducible factor 1a in patients with proliferative diabetic retinopathy. Am J Ophthalmol. 2009 Dec;148(6):883-9. doi: 10.1016/j.ajo.2009.07.007. Epub 2009 Oct 17. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	best-corrected visual acuity (BCVA)	every visit time	from preoperation to 3 months follow-up
Primary	central retinal thickness	every visit time	from preoperation to 3 months follow-up
Secondary	surgery time	intraoperative index	during surgery
Secondary	intraoperative bleeding	intraoperative index	during surgery
Secondary	intraocular electrocoagulation use	intraoperative index	during surgery
Secondary	iatrogenic retinal breaks	intraoperative index	during surgery
Secondary	relaxing retinotomy	intraoperative index	during surgery
Secondary	silicone oil tamponade	intraoperative index	during surgery
Secondary	postoperative vitreous hemorrhage	postoperative index	during 3 months follow-up
Secondary	neovascular glaucoma	postoperative index	during 3 months follow-up
Secondary	recurrent retinal detachment	postoperative index	during 3 months follow-up
Secondary	postoperative fibrovascular proliferation progression	postoperative index	during 3 months follow-up
Secondary	reoperation	postoperative index	during 3 months follow-up