Optical Coherence Tomography Angiography and in Fluorescein Angiography in Diabetic Retinopathy

December 29, 2021 updated by: Esraa Reda Mohamed Mahmoud, Assiut University

Comparison Between Findings in Optical Coherence Tomography Angiography and in Fluorescein Angiography in Patients With Diapetic Retinopathy

Diabetic retinopathy (DR) is the leading cause of decreased vision in working age people. Patients with DR can develop macular edema and proliferative retinopathy which are major causes of visual impairment [1]. The potential of OCTA regarding diagnosis and follow up of DR has been shown in previous studies [2-4]. At present fluorescein angiography (FA) represents the gold standard in the diagnosis and staging of DR [5]. With FA vascular lesions like micro aneurysms (MAs), the size of areas of non-perfusion and of the foveal avascular zone (FAZ) and retinal neovascularisations can be reliably identified [6]. Al-though the capabilities of FA are well known, its use also contains some risks related to the intravenous injection of the dye, which can cause nausea, vomiting and allergic re actions and even anaphylactic shock [7]. Besides that, it also requires time and trained personnel [8]. Image acquisition by OCTA in contrast is not as time consuming and can be performed without taking any risks. Additionally, it provides a 3 dimensional cross sectional view of the retinal and choroidal layers with micro meter depth resolution, providing depth selective information of the retinal vasculature. This facilitates accurate diagnosis and follow up of retinal vascular diseases since significant insights into both morphology and perfusion status can be obtained simultaneously. Although various artifacts appear in OCTA images, a qualitative assessment is mostly possible [9].Early changes to be seen in OCTA in patients with non-proliferative DR are vascular remodelling bordering the FAZ, vascular tortuosity, narrowing of capillary lumen and capillary dilatation. These changes cannot be seen in the same manner in FA [10].In this study we investigated the size of the FAZ and the count of MAs in patients with DR.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

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Study Type

Study Type

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Observational

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
40

Contacts and Locations

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Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Wael Prof Mohamed Ahmed Soliman

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

45 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

N/A

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

All included patients are planned to have FFA and OCTA en face 3x3mm

Description

Inclusion Criteria:

  • All Pts with confirmed type 2 diabetes of at least 6 months. Best corrected visual Acuity of 6/60 or higher (using asnellen chart) in each eye

Exclusion Criteria:

  • Dense media opacities interfere with image FFA as dense cataract . Previous TTT mainly retinal laser photocoagulation or intra vitreal injection. History of ocular disease as glaucoma and retinal vascular occlusion . Previous ocular surgery.

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

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Compare findings in OCTA.Ffa in DR
Time Frame: Baseline
Number of microaneurysm.degree of ischemia.size of FAZ
Baseline

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Assiut University

Publications and helpful links

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General Publications

Study record dates

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Study Major Dates

Study Start (Anticipated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 1, 2022

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 1, 2023

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
February 1, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 29, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 29, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 13, 2022

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 13, 2022

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 29, 2021

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2021

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • FFDR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

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