Pars Plana Vitrectomy Combined With Phacoemulsification Cataract Surgery in Phakic Diabetes Retinopathy Patients
NCT ID: NCT04729023
Last Updated: 2022-09-09
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
129 participants
INTERVENTIONAL
2021-02-01
2022-09-05
Brief Summary
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However, as a predictable consequence of PPV surgery, postoperative cataract is observed in 79%-95% of phakic diabetes retinopathy patients after PPV in 6-24 months and a subsequent cataract surgery is usually required. While, the subsequent cataract surgeries not only bring additional economy and workload burden, but also increase the surgical risks. Since the two-step surgical approach has its defects, the combination of PPV and phacoemulsification is an ideal surgical option.
This study is a multi-center prospective study, aimed to evaluate the effect of PPV combined with phacoemulsification cataract surgery in phakic diabetes retinopathy patients, and make a comparation between the combined surgery and the two-step surgery in patients without severe lens opacities.
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Detailed Description
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However, as a predictable consequence of PPV surgery, postoperative cataract is observed in 79%-95% of phakic diabetes retinopathy patients after PPV in 6-24 months.Generally, subsequent cataract surgeries are required for the phakic patients within 6-16 months after the PPV surgery to improve visualization. While, the subsequent cataract surgeries not only bring additional economy and workload burden, but also increase the surgical risks because of the deep anterior chamber, zonular dehiscence, and inflammation. Since the two-step surgical approach has its defects, the combination of PPV and phacoemulsification is an ideal surgical option, which is only suggested in patients with severe lens opacities before the PPV surgery so far. For those with mild-moderate lens opacities, the benefits of combined surgery is unknown.
This study is a multi-center prospective study, aimed to evaluate the effect of PPV combined with phacoemulsification cataract surgery in phakic diabetes retinopathy patients, and make a comparation between the combined surgery and the two-step surgery in patients without severe lens opacities.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Combined surgery group
In this group, all eligible patients will receive pars plana vitrectomy combined with phacoemulsification cataract surgery.
Pars plana vitrectomy combined with cataract surgery.
In the combined surgery group, phakic diabetes retinopathy patients over 45 years old without severe lens opacity will receive pars plana vitrectomy combined with phacoemulsification and intraocular lens (IOL) implantation at the same time.
Subsequent surgery group
In this group, all eligible patients will receive pars plana vitrectomy first. And a subsequent phacoemulsification will be systematically performed 6 months after the PPV surgery.
Pars plana vitrectomy with subsequent cataract surgery.
In the control group, phakic diabetes retinopathy patients over 45 years old without severe lens opacity will first receive pars plana vitrectomy and a subsequent phacoemulsification with IOL implantation will be performed at least 6 month after the PPV.
Interventions
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Pars plana vitrectomy combined with cataract surgery.
In the combined surgery group, phakic diabetes retinopathy patients over 45 years old without severe lens opacity will receive pars plana vitrectomy combined with phacoemulsification and intraocular lens (IOL) implantation at the same time.
Pars plana vitrectomy with subsequent cataract surgery.
In the control group, phakic diabetes retinopathy patients over 45 years old without severe lens opacity will first receive pars plana vitrectomy and a subsequent phacoemulsification with IOL implantation will be performed at least 6 month after the PPV.
Eligibility Criteria
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Inclusion Criteria
2. Age over 45 years old;
3. mild-moderate lens opacities(LOCSâ…˘ : C3N3P3 or below);
4. recognition of at least one alphabet in ETDRS chart.
Exclusion Criteria
2. Low Vision or blind on the other eye;
3. Macular degeneration, including age-related macular degeneration and Polypoidal choroidal vasculopathy;
4. Ocular trauma;
5. Glaucoma;
6. Hereditary retinopathy;
7. Severe lens opacities before the surgery (LOCSâ…˘ : C4N4P4 or above).
45 Years
ALL
No
Sponsors
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Zhongshan Ophthalmic Center, Sun Yat-sen University
OTHER
Responsible Party
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Locations
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Zhongshan Ophthalmic center, Sun Yat-sen University
Guangzhou, Guangdong, China
Countries
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References
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Novak MA, Rice TA, Michels RG, Auer C. The crystalline lens after vitrectomy for diabetic retinopathy. Ophthalmology. 1984 Dec;91(12):1480-4. doi: 10.1016/s0161-6420(84)34100-8.
Hsuan JD, Brown NA, Bron AJ, Patel CK, Rosen PH. Posterior subcapsular and nuclear cataract after vitrectomy. J Cataract Refract Surg. 2001 Mar;27(3):437-44. doi: 10.1016/s0886-3350(00)00585-x.
Melberg NS, Thomas MA. Nuclear sclerotic cataract after vitrectomy in patients younger than 50 years of age. Ophthalmology. 1995 Oct;102(10):1466-71. doi: 10.1016/s0161-6420(95)30844-5.
Blodi BA, Paluska SA. Cataract after vitrectomy in young patients. Ophthalmology. 1997 Jul;104(7):1092-5. doi: 10.1016/s0161-6420(97)30180-8.
Westesson PL, Lundh H. Temporomandibular joint disk displacement: arthrographic and tomographic follow-up after 6 months' treatment with disk-repositioning onlays. Oral Surg Oral Med Oral Pathol. 1988 Sep;66(3):271-8. doi: 10.1016/0030-4220(88)90230-7.
Soto-Hernandez JL, Nunley D, Gutierrez CC, Berk SL. Listeria monocytogenes peritonitis. Am J Gastroenterol. 1988 Feb;83(2):180-2.
Peyman GA, Huamonte F, Goldberg MF. Management of cataract in patients undergoing vitrectomy. Am J Ophthalmol. 1975 Jul;80(1):30-6. doi: 10.1016/0002-9394(75)90864-8.
Treumer F, Bunse A, Rudolf M, Roider J. Pars plana vitrectomy, phacoemulsification and intraocular lens implantation. Comparison of clinical complications in a combined versus two-step surgical approach. Graefes Arch Clin Exp Ophthalmol. 2006 Jul;244(7):808-15. doi: 10.1007/s00417-005-0146-9. Epub 2005 Dec 3.
Biro Z, Kovacs B. Results of cataract surgery in previously vitrectomized eyes. J Cataract Refract Surg. 2002 Jun;28(6):1003-6. doi: 10.1016/s0886-3350(02)01237-3.
Meyers SM, Klein R, Chandra S, Myers FL. Unplanned extracapsular cataract extraction in postvitrectomy eyes. Am J Ophthalmol. 1978 Nov;86(5):624-6. doi: 10.1016/0002-9394(78)90179-4.
Smiddy WE, Stark WJ, Michels RG, Maumenee AE, Terry AC, Glaser BM. Cataract extraction after vitrectomy. Ophthalmology. 1987 May;94(5):483-7. doi: 10.1016/s0161-6420(87)33420-7.
Senn P, Schipper I, Perren B. Combined pars plana vitrectomy, phacoemulsification, and intraocular lens implantation in the capsular bag: a comparison to vitrectomy and subsequent cataract surgery as a two-step procedure. Ophthalmic Surg Lasers. 1995 Sep-Oct;26(5):420-8.
Silva PS, Diala PA, Hamam RN, Arrigg PG, Shah ST, Murtha TL, Schlossman DK, Cavallerano JD, Sun JK, Aiello LP. Visual outcomes from pars plana vitrectomy versus combined pars plana vitrectomy, phacoemulsification, and intraocular lens implantation in patients with diabetes. Retina. 2014 Oct;34(10):1960-8. doi: 10.1097/IAE.0000000000000171.
Other Identifiers
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2020KYPJ167
Identifier Type: -
Identifier Source: org_study_id
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