Clinical Trials Logo

Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT01975103
Other study ID # EPM-001
Secondary ID
Status Recruiting
Phase Phase 2
First received
Last updated
Start date March 2013
Est. completion date April 2020

Study information

Verified date November 2018
Source Federal University of Rio Grande do Sul
Contact Daniel Lavinsky, MD, PhD
Phone +555133302444
Email daniellavinsky@gmail.com
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

This trial seeks to prove the safety and efficacy of photothermal stimulation treatment to diabetic macular edema, chronic central serous retinopathy, macular edema secondary to branch retinal vein occlusion and macular telangiectasia.


Description:

Sub-visible, non-damaging photothermal stimulation (532nm) exposures of 100 ms in duration resulted in enhanced expression of heat shock proteins in the retina. To test clinical efficacy of sub-visible retinal therapy using ms-range exposures of visible lasers one needs first to establish proper titration methods necessary to assure on one hand the lack of tissue damage, and on the other hand sufficient hyperthermia to elicit cellular response. We used an algorithm based on computational and experimental data to provide parameters that can cause photothermal stimulation to the retinal pigment epithelium without causing collateral damage to photoreceptors or choroid. This method will be used to treat macular diseases such as diabetic macular edema, branch retinal vein occlusion macular edema, chronic central serous retinopathy and macular telangiectasia.


Recruitment information / eligibility

Status Recruiting
Enrollment 20
Est. completion date April 2020
Est. primary completion date April 2020
Accepts healthy volunteers No
Gender All
Age group 18 Years to 100 Years
Eligibility Inclusion Criteria:

- The patient must have macular edema involving the center of the macula with a corresponding leakage on fluorescein angiography.

Thickening of the fovea of at least 300 microns (thickness of the central point in OCT) with a standard deviation of the center point <10% and signal strength of = 5 OCT ILM and borders (internal limiting membrane) and RPE (retinal pigment epithelium) properly identified. Also, the initial OCT must be confirmed by repeated measurements on the same day, with the thickness of the central point being within 10% between measurements. In cases where the OCT imaging program can not properly define the limits of ILM and RPE, if the investigator can obtain an estimate of the thickness of the manual by OCT central point of at least 300 microns, the patient will be considered eligible.

The distance visual acuity in the better eye corrected the study must have an index between 70 and 35 letters inclusive (Snellen equivalent of 20/40 to 20/200).

Clear media and eye pupil dilation adequate to allow fundus photography with good quality.

Intraocular pressure not exceeding 21 mmHg. The ophthalmologist should feel comfortable with the delay of the focal laser treatment (direct and grid, as needed) by at least 12 weeks in the study eye.

Patients with diabetes Type I or Type II as defined by WHO criteria of any gender and age = 18 years.

Ability to provide a written consent. Ability to return for all study visits.

Exclusion Criteria:

- Eyes with scatter photocoagulation (PRP) one month prior the enrollment, or eyes where scatter photocoagulation is required now, or it likely to be needed over the next 6months (for example, eyes with high risk PDR DRS not properly treated with photocoagulation).

Presence of any abnormality that is likely to confound the assessment of the improvement in visual acuity in eyes with macular edema to resolve or improve as an area of hard exudates involving the foveal avascular zone (FAZ - involving 2 or more quadrants centered around the foveal avascular zone), epiretinal membrane associated with signs of contraction and / or significant opacification (ie, striations within the diameter of a disc from the center of the fovea), or the presence of chorioretinal atrophy involving the center of the macula.

Vitreomacular traction determined clinically and / or OCT, which in the opinion of the investigator, contributes to macular edema (associated or cause a detachment of the fovea) and prevents the improvement with treatment.

Atrophy / scar / fibrosis involving the center of the macula, including evidence of atrophy treated with laser within 200 microns of the FAZ.

Patients who received panphotocoagulation, YAG laser, or peripheral retinal cryoablation (for retinal tears) or focal or grid photocoagulation within the last 12 weeks or more of treatment with focal or grid laser.

Significant opacities of the optical medium, including cataracts, which may interfere with visual acuity, assessment of toxicity or photography background. Patients will not be included if they have high probability of requiring cataract surgery within the next year.

Any intraocular surgery within 6 months prior to study entry. Prior peeling of epiretinal membrane or inner limiting membrane. Any major surgical procedure within one month of study entry Prior irradiation of the head region of the eye under study. Any previous pharmacological treatment for DME, BRVO, CSR or MacTel (including corticosteroid intravitreal, subconjunctival or subtenon) or at any time during the last 90 days for any other condition.

Important known allergies to sodium fluorescein dye used in angiography. Acute ocular or periocular infection.

Study Design


Intervention

Procedure:
Topcon Endpoint Management


Locations

Country Name City State
Brazil Instituto de Oftalmologia Lavinsky Porto Alegre RS

Sponsors (1)

Lead Sponsor Collaborator
Federal University of Rio Grande do Sul

Country where clinical trial is conducted

Brazil, 

References & Publications (1)

Lavinsky D, Sramek C, Wang J, Huie P, Dalal R, Mandel Y, Palanker D. Subvisible retinal laser therapy: titration algorithm and tissue response. Retina. 2014 Jan;34(1):87-97. doi: 10.1097/IAE.0b013e3182993edc. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Best corrected visual acuity 6 months
Secondary Central macular thickness on OCT 6 months
See also
  Status Clinical Trial Phase
Completed NCT03953807 - A Study to Evaluate the Effectiveness and Safety of OZURDEX® in Patients With Diabetic Macular Edema But Never Treated Phase 4
Completed NCT03622580 - A Study to Evaluate the Efficacy and Safety of Faricimab (RO6867461) in Participants With Diabetic Macular Edema (YOSEMITE) Phase 3
Recruiting NCT06262737 - Single-center Study Measuring OSDI Dry Eye Score in Patients Undergoing an Anti-VEGF Induction Protocol
Terminated NCT04611152 - A Trial to Evaluate the Efficacy, Durability, and Safety of KSI-301 Compared to Aflibercept in Participants With Diabetic Macular Edema (DME) Phase 3
Terminated NCT04603937 - A Study to Evaluate the Efficacy, Durability, and Safety of KSI-301 Compared to Aflibercept in Participants With Diabetic Macular Edema (DME) Phase 3
Active, not recruiting NCT04108156 - This Study Will Evaluate the Efficacy, Safety, and Pharmacokinetics of the Port Delivery System With Ranibizumab in Participants With Diabetic Macular Edema Compared With Intravitreal Ranibizumab Phase 3
Completed NCT02867735 - A Study to Assess the Safety, Tolerability, Pharmacokinetics and Pharmacodynamic Activity of Intravitreal LKA651 in Patients With Macular Edema Phase 1
Withdrawn NCT03629210 - Combination OZURDEX® & EyLea® vs. OZURDEX® Monotherapy in IncompLete-Responders wIth Diabetic Macular Edema Phase 2
Withdrawn NCT02842541 - Safety Study of Intravitreal EBI-031 Given as a Single or Repeat Injection to Subjects With Diabetic Macular Edema Phase 1
Completed NCT02221453 - Cytokine Levels in Patients With Persistent Diabetic Macular Edema Treated With Triamcinolone Acetonide Phase 2
Completed NCT02556723 - Intravitreal Injections of Ziv-aflibercept for Macular Diseases N/A
Completed NCT02979665 - Changes to the Retina Following Anti-VEGF Treatments for Diabetic Macular Edema
Completed NCT02000102 - Outcomes of Diabetic Macula Edema Patients Switched to Aflibercept From Bevacizumab and/or Ranibizumab N/A
Completed NCT02088229 - Relating Retinal Structural and Functional Parameters to Visual Acuity in Eyes Undergoing Treatment for Diabetic Macular Edema N/A
Terminated NCT00779142 - Utility of Intravitreal Methotrexate in Diabetic Macular Edema Resistant to Conventional Therapies N/A
Completed NCT01171976 - Efficacy and Safety of Ranibizumab in Two "Treat and Extend" Treatment Algorithms Versus Ranibizumab As Needed in Patients With Macular Edema and Visual Impairment Secondary to Diabetes Mellitus Phase 3
Completed NCT00989989 - Efficacy and Safety of Ranibizumab (Intravitreal Injections) in Patients With Visual Impairment Due to Diabetic Macular Edema Phase 3
Completed NCT00683176 - Effect of Choline Fenofibrate (SLV348) on Macular Edema Phase 2
Terminated NCT00768040 - Efficacy of Aliskiren in the Treatment of Diabetic Macular Edema Phase 2
Completed NCT01259609 - Changes in Ciliary Body Thickness in Patients With Diabetic Macular Edema After Vitrectomy N/A