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
- Diseases
- Diabetic eye disease
- 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
Sites (65)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Emanuelli Research & Development Center Coordinator of this site? Confirm its status | Arecibo | Puerto Rico | Unknown status |
| Retina Research Institute of Texas Coordinator of this site? Confirm its status | Abilene | United States | Unknown status |
| Retina Consultants of Hawaii at Pali Momi Medical Center Coordinator of this site? Confirm its status | ‘Aiea | United States | Unknown status |
| Asheville Eye Associates Western Carolina Retinal Associates;Clinical Research Coordinator of this site? Confirm its status | Asheville | United States | Unknown status |
| Southeast Retina Center Coordinator of this site? Confirm its status | Augusta | United States | Unknown status |
| Austin Retina Associates;Opthalmology Coordinator of this site? Confirm its status | Austin | United States | Unknown status |
| California Retina Consultants Coordinator of this site? Confirm its status | Bakersfield | United States | Unknown status |
| Johns Hopkins Hospital;Johns Hopkins Med;Wilmer Eye Inst Coordinator of this site? Confirm its status | Baltimore | United States | Unknown status |
| The Retina Care Center Coordinator of this site? Confirm its status | Baltimore | United States | Unknown status |
| Retina & Vitreous of Texas Coordinator of this site? Confirm its status | Bellaire | United States | Unknown status |
| Envision Ocular, LLC Coordinator of this site? Confirm its status | Bloomfield | United States | Unknown status |
| Charlotte Eye Ear Nose and Throat Associates- SouthPark;Retina Coordinator of this site? Confirm its status | Charlotte | United States | Unknown status |
| Pepose Vision Institute Coordinator of this site? Confirm its status | Chesterfield | United States | Unknown status |
| Northwestern Memorial Hospital Coordinator of this site? Confirm its status | Chicago | United States | Unknown status |
| Ohio State Havener Eye Institute;Ophthalmology Research Coordinator of this site? Confirm its status | Columbus | United States | Unknown status |
| Texas Retina Associates;Research Coordinator of this site? Confirm its status | Dallas | United States | Unknown status |
| Southwest Retina Research Center Coordinator of this site? Confirm its status | Durango | United States | Unknown status |
| Duke Eye Center Coordinator of this site? Confirm its status | Durham | United States | Unknown status |
| Retina Vitreous Center - Glen Eagles Coordinator of this site? Confirm its status | Edmond | United States | Unknown status |
| The Retina Partners Coordinator of this site? Confirm its status | Encino | United States | Unknown status |
| Retina Consultants of Orange County;Clinical Research Coordinator of this site? Confirm its status | Fullerton | United States | Unknown status |
| Charles Retina Institution;Retina surgery Coordinator of this site? Confirm its status | Germantown | United States | Unknown status |
| Retina Center of Texas Coordinator of this site? Confirm its status | Grapevine | United States | Unknown status |
| Cumberland Valley Retina Consultants;Clinical Research Coordinator of this site? Confirm its status | Hagerstown | United States | Unknown status |
| Retina Consultants of Texas Coordinator of this site? Confirm its status | Houston | United States | Unknown status |
| Illinois Retina Associates Coordinator of this site? Confirm its status | Joliet | United States | Unknown status |
| Southeastern Retina Associates Coordinator of this site? Confirm its status | Knoxville | United States | Unknown status |
| Charleston Neuroscience Coordinator of this site? Confirm its status | Ladson | United States | Unknown status |
| Colorado Clinical Research Coordinator of this site? Confirm its status | Lakewood | United States | Unknown status |
| University Retina Coordinator of this site? Confirm its status | Lemont | United States | Unknown status |
| Retina Associates Coordinator of this site? Confirm its status | Lenexa | United States | Unknown status |
| Retina-Vitreous Surgeons of Central New York Coordinator of this site? Confirm its status | Liverpool | United States | Unknown status |
| Jules Stein Eye Institute/ UCLA Coordinator of this site? Confirm its status | Los Angeles | United States | Unknown status |
| Piedmont Eye Center Coordinator of this site? Confirm its status | Lynchburg | United States | Unknown status |
| Georgia Retina Coordinator of this site? Confirm its status | Marietta | United States | Unknown status |
| Barnet Dulaney Perkins Eye Center Coordinator of this site? Confirm its status | Mesa | United States | Unknown status |
| VitreoRetinal Surgery PLLC;DBA Retina Consultants of Minnesota Coordinator of this site? Confirm its status | Minneapolis | United States | Unknown status |
| Rocky Mountain Retina Consultants Coordinator of this site? Confirm its status | Murray | United States | Unknown status |
| Tennessee Retina Coordinator of this site? Confirm its status | Nashville | United States | Unknown status |
| New York University (NYU) Coordinator of this site? Confirm its status | New York | United States | Unknown status |
| Wagner Kapoor Institute;Opthalmology Coordinator of this site? Confirm its status | Norfolk | United States | Unknown status |
| California Eye Specialists Medical Group Coordinator of this site? Confirm its status | Pasadena | United States | Unknown status |
| Retina Specialty Institute Coordinator of this site? Confirm its status | Pensacola | United States | Unknown status |
| Mid Atlantic Retina;Retina Research Coordinator of this site? Confirm its status | Philadelphia | United States | Unknown status |
| Associated Retina Consultants Coordinator of this site? Confirm its status | Phoenix | United States | Unknown status |
| Retinal Consultants of Arizona;Opthalmology Coordinator of this site? Confirm its status | Phoenix | United States | Unknown status |
| Fort Lauderdale Eye Institute Coordinator of this site? Confirm its status | Plantation | United States | Unknown status |
| Retina Northwest;Research Department Coordinator of this site? Confirm its status | Portland | United States | Unknown status |
| Maine Eye Center Coordinator of this site? Confirm its status | Portland | United States | Unknown status |
| Sierra Eye Associates Coordinator of this site? Confirm its status | Reno | United States | Unknown status |
| Retina Institute of Virginia Coordinator of this site? Confirm its status | Richmond | United States | Unknown status |
| Kaiser Permanente;RESEARCH AND EVALUATION Coordinator of this site? Confirm its status | Riverside | United States | Unknown status |
| Associated Retinal Consultants - Royal Oak Coordinator of this site? Confirm its status | Royal Oak | United States | Unknown status |
| Retina Consultants Medical Group Coordinator of this site? Confirm its status | Sacramento | United States | Unknown status |
| Retina Associates of Utah, PLLC;Clinical Research Coordinator of this site? Confirm its status | Salt Lake City | United States | Unknown status |
| Medical Center Ophthalmology Associates Coordinator of this site? Confirm its status | San Antonio | United States | Unknown status |
| Orange County Retina Medical Group Coordinator of this site? Confirm its status | Santa Ana | United States | Unknown status |
| Pacific Northwest Retina Coordinator of this site? Confirm its status | Silverdale | United States | Unknown status |
| Spokane Eye Clinical Research;Spokane Eye Surgery Center Coordinator of this site? Confirm its status | Spokane | United States | Unknown status |
| Retina Associates of Florida;Retina Associates of Florida Coordinator of this site? Confirm its status | Tampa | United States | Unknown status |
| Retina Associates of New Jersey Coordinator of this site? Confirm its status | Teaneck | United States | Unknown status |
| Retina Consultants of Texas Coordinator of this site? Confirm its status | The Woodlands | United States | Unknown status |
| Retina Group of New England Coordinator of this site? Confirm its status | Waterford | United States | Unknown status |
| Palmetto Retina Center Coordinator of this site? Confirm its status | West Columbia | United States | Unknown status |
| Cape Fear Retinal Associates Coordinator of this site? Confirm its status | Wilmington | United States | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.