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Diabetic Retinopathy Vitrectomy Study (DRVS)

This study has been completed.
Information provided by:
National Eye Institute (NEI) Identifier:
First received: September 23, 1999
Last updated: June 23, 2005
Last verified: October 1999

To compare two therapies, early vitrectomy and conventional management, for recent severe vitreous hemorrhage secondary to diabetic retinopathy. Conventional management includes vitrectomy if hemorrhage fails to clear during a waiting period of 6 to 12 months or if retinal detachment involving the center of the macula develops at any time.

To compare early vitrectomy and conventional management in eyes that have good vision but a poor prognosis because they are threatened with hemorrhage or retinal detachment from very severe proliferative retinopathy.

To study the natural history of severe proliferative diabetic retinopathy.

Condition Intervention Phase
Diabetic Retinopathy
Retinal Detachment
Vitreous Hemorrhage
Procedure: Vitrectomy
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Primary Purpose: Treatment

Resource links provided by NLM:

Further study details as provided by National Eye Institute (NEI):

Study Start Date: October 1976
Detailed Description:

Vitrectomy may not only remove vitreous hemorrhage but also prevent or relieve traction on the retina from contraction of the fibrovascular membranes that characterize severe proliferative diabetic retinopathy. It is important to determine whether early intervention with vitrectomy has a better visual outcome or instead produces a rate of serious complications higher than the rate associated with conventional management.

Two randomized trials were carried out in the DRVS among patients ages 18 to 70 years who had either insulin-dependent or non-insulin-dependent diabetes. In the first trial, the 616 patients who were recruited had severe visual loss from recent severe vitreous hemorrhage in at least one eye. Eligible eyes were randomly assigned either to early vitrectomy or to conventional management. In the conventional management group, vitrectomy was carried out 1 year later if hemorrhage persisted; vitrectomy was carried out sooner if retinal detachment -involving the center of the macula occurred.

In the second trial, 381 patients were recruited, all of whom had severe fibrovascular proliferations and useful vision in at least one eye. Eligible eyes were assigned either to early vitrectomy or to conventional management. Conventional management included photocoagulation when indicated, with vitrectomy if a severe vitreous hemorrhage occurred and failed to clear spontaneously during a 6-month waiting period or if retinal detachment involving the center of the macula -occurred. After randomization and treatment, all patients were examined at 6-month intervals for 2 years and annually thereafter. Comparisons of visual acuity distributions between experimental and control groups were made.


Ages Eligible for Study:   18 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Men and women eligible for the vitreous hemorrhage group had at least one eye with recent severe vitreous hemorrhage (within 5 months) and visual acuity of 5/200 or less. Patients eligible for the "very severe proliferative retinopathy with useful vision" group had extensive active fibrovascular proliferations and visual acuity of 10/200 or better.
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  More Information

Publications: Identifier: NCT00000154     History of Changes
Other Study ID Numbers: NEI-56
Study First Received: September 23, 1999
Last Updated: June 23, 2005

Additional relevant MeSH terms:
Diabetic Retinopathy
Retinal Diseases
Retinal Detachment
Vitreous Hemorrhage
Pathologic Processes
Eye Diseases
Diabetic Angiopathies
Vascular Diseases
Cardiovascular Diseases
Diabetes Complications
Diabetes Mellitus
Endocrine System Diseases
Eye Hemorrhage processed this record on April 28, 2017