Suprachoroidal Injection of Triamcinolone Acetonide for Management of Diabetic Macular Edema (SCI)

Comparative Study Between Intravitreal and Suprachoroidal Injection of Triamcinolone Acetonide for Management of Diabetic Macular Edema

Intravitreal triamcinolone acetonide is a well-known method of treatment of diabetic macular edema, however, it has many side effects, most commonly causing cataract and glaucoma. Suprachoroidal route is an emerging route of delivery of intraocular drugs.

This is to our knowledge the first prospective study to compare the effect of triamcinolone acetonide delivered via the intravitreal versus the suprachoroidal route in the treatment of diabetic macular edema as regards safety and efficacy.

Study Overview

• Status: Unknown
• Conditions: Efficacy; Safety
• Intervention / Treatment: Procedure: Intravitreal injection (4mg/0.1ml); Procedure: Superachoroidal injection (4 mg/0.1ml); Procedure: Suprachoroidal injection (2mg/0.1ml)

Detailed Description

The purposes of this study were:

1. To compare between intravitreal and suprachoroidalTA injection for treatment of DME in terms of improvement in both best corrected visual acuity (BCVA) and central macular thickness (CMT), and development of complications.

2. To identify which dose of TA will be efficient using the suprachoroidal route.

   • Type of Study: A prospective interventional randomized comparative study.
   • Study setting:Ophthalmology Department, Ain Shams University.
   • Study period:2 years.
   • Study population: Patients having DME.
   • Sample size: The study will be conducted on 45 eyes. This was done using PASS program, setting alpha error at 5% and power at 80%. Results from previous study (Koc et al., 2017) showed that the mean improvement in BCVA after 6 months of intravitreal injection of TA was 4.6 ± 8.8. While it is assumed to be 12.6 and 14.6 for the low dose and high dose suprachoroidal route.
   • Ethical considerations: Explanation of the procedure will be done for all patients and an informed written consent will be taken. Ethics committee approval will be obtained from the Institutional Review Board of the Faculty of Medicine, Ain Shams University.

All patients will undergo the following at initial presentation:

• Careful history taking.
• Full ophthalmological assessment including:

Baseline BCVA. Anterior segment examination using slit lamp biomicroscopy. IOP measurement using Goldmann applanation tonometer. Posterior segment examination using binocular indirect ophthalmoscopy and indirect slit lamp biomicroscopy (+90D Volk lens) for detailed evaluation of the macula and optic nerve head.

Fundus photography using VX-20 Kowa fundus camera, Japan. Ultrasound biomicroscopy (UBM) for measurement of scleral thickness in groups (II) and (III)using VuMax, Sonomed Escalon, theUnited States of America.

Spectral domain optical coherence tomography (SD-OCT) imaging using Retinascan RS 3000 advance, Nidek co.ltd, Gamgori, Japan.

Examination protocol: Macular map and 12 radial line scans to determine central macular thickness (1mm) and macular thickness in the inner 3 and 6 mm rings divided each into four quadrants.

Duration of follow up: 6 months.

Follow up schedule:

Follow up visits will be done at 1 day, 1 week, 1 month,3 months and 6 months.During the follow up, the following will be done:

• BCVA measurement.
• Full ophthalmological examination.
• Fundus photography after six months of injection.
• CMT measurement using SD-OCT at 1,3 and 6 months post-injection. In case of resistance to treatment (worsening of BCVA or CMT, or persistence of macular edema with central thickness less than 300µm), reinjection will be considered using the same drug and/or anti-VEGF agents.

• Study Type: Interventional
• Enrollment (Anticipated): 45
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Azza MA Said, MD; Phone Number: 2001006228992; Email: dr_azza_22@hotmail.com
• Study Contact Backup: Name: Yousra GZ Selim, Msc; Phone Number: 2001006799302

Study Locations

• Egypt
  • Cairo, Egypt
    • Recruiting
    • ain shams University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 38 years to 68 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Type-II Diabetes Mellitus patients.
• Centrally involving DME with central thickness<300µm with no vitreomacular traction.
• Recently diagnosed DME or received treatment for DME in more than six months.

Exclusion Criteria:

• Pre-existingretinal disease other than diabetic retinopathy.
• Diabetic macular ischemia.
• IOP ≥ 21 mmHg and/or asymmetrical cup disc ratio or glaucoma patients.
• Prior cataract extraction of less than six months.
• Opaque media, uncooperative patients or patients with poor fixation.
• Any uncontrolled systemic disease.
• Systemic or local medicationsthat might affect the macular thickness

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Study group I : Intravitreal injection; A single intravitreal injection of 0.1 ml triamcinolone acetonide in a concentration of 4 mg / 0.1 ml.	Procedure: Intravitreal injection (4mg/0.1ml); Injection will be performed in the operating room under complete sterile conditions Under topical anaesthesia. Intravitreal injection (4mg/0.1ml) of triamicinolone acetonide will be done using a 30-31 gauge needle at a distance of 3.5 mm from the limbus in aphakic or pseudophakic patients, and 4 mm in phakic patients. The needle will be then removed with application of cotton tipped applicator over the entry site. -IOP monitoring will be done at 15, 30 and 60 minutes following injection in all groups.
Active Comparator: Study group II: Suprachoroidal injection of full dose; A single suprachoroidal injection of 0.1 ml triamcinolone acetonide in a concentration of 4 mg / 0.1 ml.	Procedure: Superachoroidal injection (4 mg/0.1ml); Injection will be performed in the operating room under complete sterile conditions Under topical anaesthesia. Suprachoroidal injection (4mg/0.1ml) of triamcinolone acetonide will be done using a custom-made 30-31 gauge needle with a sleeve to prevent further penetration of the needle into the vitreous cavity. Injection will be done at approximately 4 mm from the limbus.; IOP monitoring will be done at 15, 30 and 60 minutes following injection in all groups.; UBM assessment will be done 24 hours following injection to confirm targeting of the suprachoroidal space.
Active Comparator: Study group III : Suprachoroidal injection of half dose; They will receive a single suprachoroidal injection of 0.1 ml triamcinolone acetonide in a concentration of 2 mg / 0.1 ml.	Procedure: Suprachoroidal injection (2mg/0.1ml); njection will be performed in the operating room under complete sterile conditions Under topical anaesthesia. Suprachoroidal injection (2mg/0.1ml) of triamcinolone acetonide will be done using a custom-made 30-31 gauge needle with a sleeve to prevent further penetration of the needle into the vitreous cavity. Injection will be done at approximately 4 mm from the limbus.; IOP monitoring will be done at 15, 30 and 60 minutes following injection in all groups.; UBM assessment will be done 24 hours following injection to confirm targeting of the suprachoroidal space.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Best Corrected Visual Acuity (BCVA)	Change in BCVA (Log.MAR) equal or more than 1 line	Six months after injection

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Central macular thickness (CMT)	Change in CMT (um) equal or more than 50 um	Six months after injection
Complications	e.g. change in intraocular pressure	During the six months after injection

Collaborators and Investigators

• Sponsor: Azza Mohamed Ahmed Said
• Collaborators: Ain Shams University
• Investigators: Principal Investigator: Abdelrahman G Salman, MD, ain shams University

Study record dates

Study Major Dates

• Study Start (Actual): March 13, 2019
• Primary Completion (Anticipated): August 7, 2020
• Study Completion (Anticipated): August 7, 2021

Study Registration Dates

• First Submitted: August 23, 2019
• First Submitted That Met QC Criteria: August 23, 2019
• First Posted (Actual): August 28, 2019

Study Record Updates

• Last Update Posted (Actual): September 3, 2019
• Last Update Submitted That Met QC Criteria: August 30, 2019
• Last Verified: August 1, 2019

More Information

Terms related to this study

• Keywords: Diabetic macular edema; Suprachoroidal injection; Tiamicinolone acetonide
• Additional Relevant MeSH Terms: Eye Diseases; Retinal Degeneration; Retinal Diseases; Macular Degeneration; Macular Edema
• Other Study ID Numbers: AinShamsU1

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No