Evaluation of a Treat and Extend Regimen of Intravitreal Aflibercept for Macular Edema Secondary to CRVO
Condition: Central Retinal Vein Occlusion
MeSH terms: Macular Edema; Retinal Vein Occlusion
Intervention: Aflibercept (Eylea, BAY86-5321)
Intervention description: The recommended dose for intravitreal aflibercept was 2 mg equivalent to 50 μL. Study treatment was administered at baseline and at monthly intervals until stabilization of disease. When stability was achieved, the treatment interval could be extended based on visual and anatomic outcomes as judged by the treating investigator.
Intervention MeSH terms: Aflibercept
Phase: Phase 4
Study type: Interventional
Primary purpose: Treatment
Intervention model: Single Group Assignment
Masking: None (Open Label)
Enrollment: 162.0
Sex: All
Minimum age: 18 Years
Healthy volunteers: No
Keywords: Bayer; Aflibercept; Eylea; Intravitreal

Summary:

      Central retinal vein occlusion (CRVO) occurs when the main blood vessel that transports blood
      away from the retina (the very back portion of the eye) becomes blocked, causing the leakage
      of fluid into the retina and thereby causing a swelling of the macula (the portion of the
      retina responsible for fine vision). This swelling is called macular edema. When the macula
      swells with fluid, central vision becomes blurry. The study drug aflibercept has been shown
      to reduce the amount of fluid and blood leaked into the retina. It can help to stabilize, and
      in many cases, improve the vision loss related to CRVO. Aflibercept has been approved for the
      treatment of macular edema secondary to CRVO in the United States (US), European Union (EU),
      Japan, and other countries.

      The study was considered research because, although the study drug was already on the market
      for macular edema secondary to CRVO, there were no studies available that addressed the
      questions of what were useful intervals for treating and assessing patients, how did they
      differ among patients, and how were criteria applied for retreatment. The purpose of this
      study was to evaluate the effectiveness, treatment interval, and safety of the treatment
      regimen (pattern for administering treatment) in subjects with macular edema secondary to
      CRVO. In addition, this study explored new imaging methods for assessing the affected eye.
    

Eligibility criteria:

        Inclusion Criteria:

          -  Center-involved macular edema secondary to CRVO for no longer than 3 months (at the
             screening visit it should be ensured that the subjects will comply with the criterion
             of ≤ 3 months since onset of macular edema at their scheduled baseline visit).

          -  Adult subjects diagnosed with macular edema secondary to CRVO who are scheduled to be
             treated with IVT aflibercept as per investigator's routine treatment practice with the
             intent to use a T&E regimen after initial dosing.

          -  Treatment-naïve subjects for macular edema secondary to CRVO.

          -  Men and women ≥ 18 years of age.

          -  Documented BCVA of ETDRS letter score of 73 to 24 letters (Snellen equivalent of 20/40
             to 20/320) in the study eye.

        Exclusion Criteria:

          -  Previous PRP or macular laser photocoagulation in the study eye.

          -  Any prior or concomitant ocular treatment (e.g. anti-VEGF therapy, corticosteroids) in
             the study eye for macular edema secondary to RVO, except dietary supplements or
             vitamins prior to inclusion in the study. Intraocular anti-VEGF treatment is permitted
             for the treatment of diseases of fellow eye except for those that are specifically
             excluded.

          -  Prior systemic anti-VEGF or corticosteroid therapy, investigational or approved,
             within the last 3 months before the first dose in the study.

          -  Previous use of intraocular corticosteroids in the study eye at any time or use of
             periocular corticosteroids in the study eye within 12 months prior to Day 1.

          -  Any active intraocular, extraocular, and periocular inflammation or infection in
             either eye within 4 weeks of screening.

          -  Any history of allergy to povidone iodine.

          -  Known serious allergy to the fluorescein sodium for injection in angiography.

          -  Presence of any contraindications indicated in the EU commission/locally approved
             label for IVT aflibercept: hypersensitivity to the active substance IVT aflibercept or
             to any of the excipients; active or suspected ocular or periocular infection; active
             severe intraocular inflammation.