OCT-angiography in Diabetic Patients

April 21, 2017 updated by: Retina Clinic, Sao Paulo, Brazil

OCT-angiography in Diabetic Patients: Qualitative Changes of the Intermediate and Deep Capillary Plexuses After Resolution of Macular Edema by Intravitreal Pharmacotherapy

Around the world there is an increasing incidence of diabetes mellitus, with millions of people affected. In this population, diabetic macular edema (DME) is the most common cause of visual impairment. While the visual impairment caused by EMD is variable, its early treatment can improve visual acuity and quality of life. The objective of this project is to use the new OCT-angiography technology, which evaluates macular capillary network without the need of intravenous injection of contrast, to assess macular microcirculatory network in its response to intravitreal pharmacological treatment of EMD. The resulting qualitative evaluation can be helpful in understanding the pathophysiology of visual loss associated with DME and in determining prognosis.

Study Overview

Status

Unknown

Conditions

Detailed Description

Patients who participate in this study will be selected among adults treated at the Retina Clinic and Ocular Oftalmologia clinics and will be aware of all stages of the research, formalizing the approval of their participation by informed consent term. The tests will be performed after pupillary dilation with 2 eye drops of tropicamide 1% (Mydriacyl, Alcon Laboratories), in Cirrus 5000 HD-OCT devices (Carl Zeiss Meditec - Dublin USA). Image acquisition protocols Optic Disc Cube 200x200 and 512x128 Macular Cube will be used, with analysis by RNFL protocols and NGO Analysis Report and Macular Cube Analysis Report, respectively. Subjective analysis of the examinations will be performed by the three authors of this project independently and then compared between them.

Study Type

Observational

Enrollment (Anticipated)

20

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Patients with diabetic macular edema.

Description

Inclusion Criteria:

  • Previous diagnosis of diabetes mellitus type 1 or 2;
  • Age equal or greater than 18 years;
  • At least one eye with diabetic macular edema and central thickness greater than or equal to 290 microns (female patients) or 305 microns (males) measured by OCT and subjected to intravitreal pharmacotherapy.

Exclusion Criteria:

  • Aphakic patients;
  • History of major eye surgeries (vitrectomy, cataract surgery, scleral buckle, other intraocular surgery) in the last 4 months;
  • Tractional retinal detachment involving the macula, vitreomacular traction syndrome or other concurrent macular diseases;
  • Advanced or uncontrolled glaucoma (according to the investigator's judgment); Evidence of angle neovascularization;
  • Presence of an eye condition (besides diabetic retinopathy) which, in the opinion of the investigator, may alter the visual acuity during the study course (e.g. venous or arterial retinal occlusions, uveitis or other ocular inflammatory diseases, neovascular glaucoma, etc.);
  • Significative cataract which, in the opinion of the investigator, may be decreasing visual acuity in 3 lines or more;
  • History of YAG Laser capsulotomy in the last 2 months;
  • Severe renal disease, defined as chronic renal failure requiring dialysis or a kidney transplant;
  • Blood pressure higher than 180/110 mmHg, acute myocardial infarction, other acute cardiac events requiring hospitalisation, stroke, transient ischemic attack or treatment for congestive heart failure;
  • Systemic treatment with anti-VEGF or pro-VEGF in the last 4 months.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
OCT-angiography qualitative changes
Time Frame: 12 months
Assess the OCT-angiography qualitative changes observed in intermediate and deep capillary networks in diabetic patients after the resolution of macular edema with intravitreal drug treatment
12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Retina Clinic, Sao Paulo, Brazil

Investigators

  • Study Chair: André Maia, M.D., Retina Clinic CEO

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2016

Primary Completion (Anticipated)

November 1, 2017

Study Completion (Anticipated)

April 1, 2018

Study Registration Dates

First Submitted

August 14, 2016

First Submitted That Met QC Criteria

August 14, 2016

First Posted (Estimate)

August 17, 2016

Study Record Updates

Last Update Posted (Actual)

April 25, 2017

Last Update Submitted That Met QC Criteria

April 21, 2017

Last Verified

April 1, 2017

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Retina Clinic / OCT

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Subscribe