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Radial Optic Neurotomy in Central Retinal Vein Occlusion : a Randomized Trial (OVCR)

This study has been terminated.
(lack of recruting)
Information provided by:
University Hospital, Bordeaux Identifier:
First received: September 20, 2006
Last updated: March 3, 2011
Last verified: August 2008
Natural evolution of severe central retinal vein occlusion with low visual acuity is very poor. A randomized clinical trial will compare troxerutin and platelet anti-aggregating agents (drug treatment) versus surgery and drug treatment. Surgery will include vitrectomy and radial optic neurotomy. The primary outcome will be vision measured 6 months after surgery.

Condition Intervention
Retinal Vein Occlusion Procedure: vitrectomy with radial optic neurotomy

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Multicenter Trial to Investigate the Safety and Efficacy of Vitrectomy With Radial Optic Neurotomy for the Preservation of Visual Function in Subjects With Central Retinal Vein Occlusion (CRVO)

Further study details as provided by University Hospital, Bordeaux:

Primary Outcome Measures:
  • Proportion of patients showing an improvement of visual acuity (at least 3 lines (15 letters) in ETDRS charts) [ Time Frame: between pre operative examination and 6 months after randomization ]

Secondary Outcome Measures:
  • Efficacy [ Time Frame: between pre operative examination and 6 months after randomization ]
  • Mean visual acuity [ Time Frame: between pre operative examination and 6 months ]
  • Macular thickness in Optical Coherence Tomography (OCT)
  • Persistence of hemorrhages in the fundus
  • Retinal ischemia indicating pan retinal photocoagulation [ Time Frame: 6 months after randomization ]
  • Safety : Serious complications after surgery (retinal detachment, retinal ischemia, neovascular glaucoma) or medical treatment during the 6 months following surgery. [ Time Frame: after surgery or medical treatment examination and 6 months after randomization ]

Enrollment: 7
Study Start Date: October 2006
Study Completion Date: September 2008
Primary Completion Date: September 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
No Intervention: 1
Standard treatment of central retinal vein occlusion : the rheologic correction
Experimental: 2
Standard treatment of central retinal vein occlusion : the rheologic correction and surgery associating pars plana vitrectomy and radial optic neurotomy
Procedure: vitrectomy with radial optic neurotomy

Detailed Description:
Central Retinal Vein Occlusion (CRVO) is the second most frequently retinal vascular disease causing loss of vision, after diabetic retinopathy. No treatment of CRVO has clearly demonstrated beneficial and long lasting visual results. Commonly used treatment options are platelet anti-aggregating agents, correcting rheologic factors with troxerutin and isovolumic hemodilution. Surgical treatment of CRVO has recently been proposed (2001) and has been studied in numerous non comparative pilot studies. Limited but encouraging results motivate our randomised controlled trial. We will evaluate at 6 months visual acuity after surgery associating pars plana vitrectomy and radial optic neurotomy, in patients with central vein occlusion and bad vision, associated with the correction of rheologic factors.

Ages Eligible for Study:   50 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Central Retinal Vein Occlusion oedematous or hemorrhagic (at fundus exam and at fluorescein angiography)
  • Visual Acuity (VA) ≤ 20/200 with ETDRS charts
  • Decreased VA since more than 1 month, less than 3 months
  • Common care recommendations for CRVO during the period before recruitment (Control ocular pressure if associated hypertension or glaucoma ; Hemodilution if hematocrit ≥ 38% ,if no cardio-vascular contra-indication, to maintain hematocrit under 38% during 6 weeks ; Troxerutin (3 /d) and aspirin (100 - 160 mg/d) ; Clinical and angiographic controls to look for retinal ischemia indicating laser PRP to prevent neovascular glaucoma.
  • Signed informed consent.

Exclusion Criteria:

  • Ischemic CRVO : 1- More than 30 disc diameters of ischemia at fluorescein angiography and/or •2- If Angiogram is uninterpretable because of hemorrhages, deficit of afferent pupillary reflex 0.9 with photographic filters (proposed by Hayreh) with indication to do laser PRP or laser PRP already done,
  • Rubeosis or neovascular glaucoma,
  • Bilateral diabetic retinopathy preproliferative or proliferative,
  • Uncharacterized coagulation disease, or anticoagulant treatment,
  • Untreated systemic disease (diabetes, severe high blood pressure, Cardiac failure) ou eye disease (glaucoma),
  • Contra-indication or documented allergy to troxerutin or platelet anti-aggregating agents,
  • Contra-indication to surgical procedure
  • incapacity to received an informed consent, incapacity to follow all the study schedule
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Please refer to this study by its identifier: NCT00379223

Service d'ophtalmologie, Hopital Pellegrin, place Amélie Raba Léon
Bordeaux, France, 33076
Sponsors and Collaborators
University Hospital, Bordeaux
Principal Investigator: Jean François KOROBELNIK, Pr University Hospital, Bordeaux
Study Chair: Geneviève CHENE, pR University Hospital, Bordeaux
  More Information

Responsible Party: Jean Pierre LEROY/Clinical Research and innovation Director, University Hospital Bordeaux Identifier: NCT00379223     History of Changes
Other Study ID Numbers: 9418-04
Study First Received: September 20, 2006
Last Updated: March 3, 2011

Keywords provided by University Hospital, Bordeaux:
retinal vein occlusion
retinal disorders
vascular diseases

Additional relevant MeSH terms:
Retinal Vein Occlusion
Retinal Diseases
Eye Diseases
Venous Thrombosis
Embolism and Thrombosis
Vascular Diseases
Cardiovascular Diseases processed this record on August 18, 2017