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NCT04503551CompletedPhase 3

A Multicenter, Randomized Study in Participants With Diabetic Retinopathy Without Center-involved Diabetic Macular Edema To Evaluate the Efficacy, Safety, and Pharmacokinetics of Ranibizumab Delivered Via the Port Delivery System Relative to the Comparator Arm

A Phase III, Multicenter, Randomized Study of the Efficacy, Safety, and Pharmacokinetics of the Port Delivery System With Ranibizumab in Patients With Diabetic Retinopathy

Source: ClinicalTrials.gov · Last updated 2 Apr 2026

Brief summary (registry, in English)

Study GR41675 is a Multicenter, Randomized Study in Participants with Diabetic Retinopathy (DR) Without Center-Involved Diabetic Macular Edema (CI-DME) to Evaluate the Efficacy, Safety of the Port Delivery System with Ranibizumab (PDS) Relative to the Comparator Arm

Status (registry)
Completed
Phase (registry)
Phase 3
Study type
Interventional
Enrollment
174 (actual)
First submitted
5 Aug 2020
Start date
Aug 2020
Primary completion date
Oct 2022
Lead sponsor
Hoffmann-La Roche
NCT number
NCT04503551

What you commit to

  • Study type: Interventional · Phase 3
  • Participants enrolled: 174
  • From Aug 2020 to the primary completion date, Oct 2022
  • 65 sites in 2 countries
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Prior treatment

  • Cerebrovascular accident or myocardial infarction within 6 months prior to randomization
  • Atrial fibrillation diagnosis or worsening within 6 months prior to randomization
  • Any intravitreal anti-VEGF treatment at any time prior to randomization
  • Any use of medicated intraocular implants, including Ozurdex® or Iluvien® implants at any time prior to randomization
  • Any intravitreal corticosteroid treatment at any time prior to randomization
  • Any periocular (e.g., subtenon) corticosteroid treatment at any time prior to randomization
  • Any PRP at any time prior to randomization
  • Any macular laser photocoagulation (such as micropulse and focal or grid laser) at any time prior to randomization
  • Any concurrent ocular condition (e.g., cataract, epiretinal membrane) that would require surgical intervention during the study to prevent or treat visual loss that might result from that condition
  • Any concurrent ocular condition (e.g., amblyopia, strabismus) that may affect interpretation of study results

Other illness

  • Current systemic treatment for a confirmed active systemic infection
  • Renal failure requiring renal transplant, hemodialysis, or peritoneal dialysis, or anticipated to require hemodialysis or peritoneal dialysis at any time during the study
  • Uncontrolled ocular hypertension or glaucoma and any such condition the investigator determines may require a glaucoma-filtering surgery during a participant's participation in the study
  • History of glaucoma-filtering surgery, tube shunts, or microinvasive glaucoma surgery
  • History of other ocular diseases that gives reasonable suspicion of a disease or condition that contraindicates the use of ranibizumab, that might affect interpretation of study results, or that renders the participant at high risk for treatment complications
    • Ocular Exclusion Criteria for Either Eye
  • Suspected or active ocular or periocular infection of either eye
  • Any history uveitis including idiopathic, drug-associated or autoimmune-associated uveitis

Lab values

  • History of other disease, other non-diabetic metabolic dysfunction, physical examination finding, or clinical laboratory finding giving reasonable suspicion of a condition that contraindicates the use of ranibizumab or surgical placement of the PDS implant; that might affect interpretation of the results of the study; or that renders the patient at high risk for treatment complications in the opinion of the investigator or Sponsor
    • Ocular Exclusion Criteria for Study Eye:

Other

  • Uncontrolled blood pressure
  • Presence of center-involved diabetic macular edema (defined as CST ≥325 µm)
  • Active intraocular inflammation (grade trace or above)
  • Clinically significant abnormalities of the vitreous-retinal interface involving the macular area or disrupting the macular architecture, such as vitreous-retinal traction or epiretinal membrane (assessed by the investigator and confirmed by the central reading center)

Who the study is looking for

  • Age ≥18 years at time of signing Informed Consent Form
  • Documented diagnosis of diabetes mellitus (Type 1 or Type 2)
  • HbA1c level of ≤12% within 2 months prior to screening or at screening
  • Moderately severe or severe NPDR (ETDRS-DRSS level 47 or 53)
  • BCVA score of ≥ 69 letters (20/40 approximate Snellen equivalent or better)

Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (65)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Emanuelli Research & Development Center
Coordinator of this site? Confirm its status
AreciboPuerto RicoUnknown status
Retina Research Institute of Texas
Coordinator of this site? Confirm its status
AbileneUnited StatesUnknown status
Retina Consultants of Hawaii at Pali Momi Medical Center
Coordinator of this site? Confirm its status
‘AieaUnited StatesUnknown status
Asheville Eye Associates Western Carolina Retinal Associates;Clinical Research
Coordinator of this site? Confirm its status
AshevilleUnited StatesUnknown status
Southeast Retina Center
Coordinator of this site? Confirm its status
AugustaUnited StatesUnknown status
Austin Retina Associates;Opthalmology
Coordinator of this site? Confirm its status
AustinUnited StatesUnknown status
California Retina Consultants
Coordinator of this site? Confirm its status
BakersfieldUnited StatesUnknown status
Johns Hopkins Hospital;Johns Hopkins Med;Wilmer Eye Inst
Coordinator of this site? Confirm its status
BaltimoreUnited StatesUnknown status
The Retina Care Center
Coordinator of this site? Confirm its status
BaltimoreUnited StatesUnknown status
Retina & Vitreous of Texas
Coordinator of this site? Confirm its status
BellaireUnited StatesUnknown status
Envision Ocular, LLC
Coordinator of this site? Confirm its status
BloomfieldUnited StatesUnknown status
Charlotte Eye Ear Nose and Throat Associates- SouthPark;Retina
Coordinator of this site? Confirm its status
CharlotteUnited StatesUnknown status
Pepose Vision Institute
Coordinator of this site? Confirm its status
ChesterfieldUnited StatesUnknown status
Northwestern Memorial Hospital
Coordinator of this site? Confirm its status
ChicagoUnited StatesUnknown status
Ohio State Havener Eye Institute;Ophthalmology Research
Coordinator of this site? Confirm its status
ColumbusUnited StatesUnknown status
Texas Retina Associates;Research
Coordinator of this site? Confirm its status
DallasUnited StatesUnknown status
Southwest Retina Research Center
Coordinator of this site? Confirm its status
DurangoUnited StatesUnknown status
Duke Eye Center
Coordinator of this site? Confirm its status
DurhamUnited StatesUnknown status
Retina Vitreous Center - Glen Eagles
Coordinator of this site? Confirm its status
EdmondUnited StatesUnknown status
The Retina Partners
Coordinator of this site? Confirm its status
EncinoUnited StatesUnknown status
Retina Consultants of Orange County;Clinical Research
Coordinator of this site? Confirm its status
FullertonUnited StatesUnknown status
Charles Retina Institution;Retina surgery
Coordinator of this site? Confirm its status
GermantownUnited StatesUnknown status
Retina Center of Texas
Coordinator of this site? Confirm its status
GrapevineUnited StatesUnknown status
Cumberland Valley Retina Consultants;Clinical Research
Coordinator of this site? Confirm its status
HagerstownUnited StatesUnknown status
Retina Consultants of Texas
Coordinator of this site? Confirm its status
HoustonUnited StatesUnknown status
Illinois Retina Associates
Coordinator of this site? Confirm its status
JolietUnited StatesUnknown status
Southeastern Retina Associates
Coordinator of this site? Confirm its status
KnoxvilleUnited StatesUnknown status
Charleston Neuroscience
Coordinator of this site? Confirm its status
LadsonUnited StatesUnknown status
Colorado Clinical Research
Coordinator of this site? Confirm its status
LakewoodUnited StatesUnknown status
University Retina
Coordinator of this site? Confirm its status
LemontUnited StatesUnknown status
Retina Associates
Coordinator of this site? Confirm its status
LenexaUnited StatesUnknown status
Retina-Vitreous Surgeons of Central New York
Coordinator of this site? Confirm its status
LiverpoolUnited StatesUnknown status
Jules Stein Eye Institute/ UCLA
Coordinator of this site? Confirm its status
Los AngelesUnited StatesUnknown status
Piedmont Eye Center
Coordinator of this site? Confirm its status
LynchburgUnited StatesUnknown status
Georgia Retina
Coordinator of this site? Confirm its status
MariettaUnited StatesUnknown status
Barnet Dulaney Perkins Eye Center
Coordinator of this site? Confirm its status
MesaUnited StatesUnknown status
VitreoRetinal Surgery PLLC;DBA Retina Consultants of Minnesota
Coordinator of this site? Confirm its status
MinneapolisUnited StatesUnknown status
Rocky Mountain Retina Consultants
Coordinator of this site? Confirm its status
MurrayUnited StatesUnknown status
Tennessee Retina
Coordinator of this site? Confirm its status
NashvilleUnited StatesUnknown status
New York University (NYU)
Coordinator of this site? Confirm its status
New YorkUnited StatesUnknown status
Wagner Kapoor Institute;Opthalmology
Coordinator of this site? Confirm its status
NorfolkUnited StatesUnknown status
California Eye Specialists Medical Group
Coordinator of this site? Confirm its status
PasadenaUnited StatesUnknown status
Retina Specialty Institute
Coordinator of this site? Confirm its status
PensacolaUnited StatesUnknown status
Mid Atlantic Retina;Retina Research
Coordinator of this site? Confirm its status
PhiladelphiaUnited StatesUnknown status
Associated Retina Consultants
Coordinator of this site? Confirm its status
PhoenixUnited StatesUnknown status
Retinal Consultants of Arizona;Opthalmology
Coordinator of this site? Confirm its status
PhoenixUnited StatesUnknown status
Fort Lauderdale Eye Institute
Coordinator of this site? Confirm its status
PlantationUnited StatesUnknown status
Retina Northwest;Research Department
Coordinator of this site? Confirm its status
PortlandUnited StatesUnknown status
Maine Eye Center
Coordinator of this site? Confirm its status
PortlandUnited StatesUnknown status
Sierra Eye Associates
Coordinator of this site? Confirm its status
RenoUnited StatesUnknown status
Retina Institute of Virginia
Coordinator of this site? Confirm its status
RichmondUnited StatesUnknown status
Kaiser Permanente;RESEARCH AND EVALUATION
Coordinator of this site? Confirm its status
RiversideUnited StatesUnknown status
Associated Retinal Consultants - Royal Oak
Coordinator of this site? Confirm its status
Royal OakUnited StatesUnknown status
Retina Consultants Medical Group
Coordinator of this site? Confirm its status
SacramentoUnited StatesUnknown status
Retina Associates of Utah, PLLC;Clinical Research
Coordinator of this site? Confirm its status
Salt Lake CityUnited StatesUnknown status
Medical Center Ophthalmology Associates
Coordinator of this site? Confirm its status
San AntonioUnited StatesUnknown status
Orange County Retina Medical Group
Coordinator of this site? Confirm its status
Santa AnaUnited StatesUnknown status
Pacific Northwest Retina
Coordinator of this site? Confirm its status
SilverdaleUnited StatesUnknown status
Spokane Eye Clinical Research;Spokane Eye Surgery Center
Coordinator of this site? Confirm its status
SpokaneUnited StatesUnknown status
Retina Associates of Florida;Retina Associates of Florida
Coordinator of this site? Confirm its status
TampaUnited StatesUnknown status
Retina Associates of New Jersey
Coordinator of this site? Confirm its status
TeaneckUnited StatesUnknown status
Retina Consultants of Texas
Coordinator of this site? Confirm its status
The WoodlandsUnited StatesUnknown status
Retina Group of New England
Coordinator of this site? Confirm its status
WaterfordUnited StatesUnknown status
Palmetto Retina Center
Coordinator of this site? Confirm its status
West ColumbiaUnited StatesUnknown status
Cape Fear Retinal Associates
Coordinator of this site? Confirm its status
WilmingtonUnited StatesUnknown status

This page is information, not medical advice. Discuss any trial with your doctor.