- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00994955
Selective Retina Therapy (SRT) for Clinically Significant Diabetic Macular Edema
Selective Retina Therapy (SRT) for Clinically Significant Diabetic Macular
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Abstract:
OBJECTIVE: To evaluate effectivity and safety of Selective Retina Therapy (SRT) for diabetic macular edema (DME).
DESIGN: Prospective two-center interventional uncontrolled case series. PARTICIPANTS: 39 eyes of 39 patients with previously untreated non-ischemic DME.
INTERVENTION: Focal laser treatment with an SRT-Laser which selectively affects the retinal pigment epithelium while sparing the photoreceptor layer. The pulse energy was individually adjusted to achieve angiographically visible but funduscopically invisible effects. Optoacoustic measurements were performed to detect the individual threshold of RPE damage during laser treatment and correlated with funduscopy and fundus fluorescein angiography (FFA) or indocyanine green angiography. Follow-up at 3 and 6 months post treatment included best-corrected ETDRS visual acuity (BCVA), FFA, fundus photography, and retinal thickness measured by optical coherence tomography (OCT).
MAIN OUTCOME MEASURES: Change of BCVA, change of retinal thickness, presence of hard exudates and leakage in FFA, specificity and sensitivity of optoacoustic measurements.
RESULTS: Mean BCVA improved from 43.7 letters (standard deviation, SD=9.1) at baseline to 46.1 letters (SD=10.5) at 6 months follow-up (p=0.02). BCVA improved (> 5 letters) or remained stable (+/- 5 letters) in 84% of eyes. 13% of eyes improved by ≥ 10 letters while 16% of eyes lost more than 5 letters. There was no severe loss of vision (loss of ≥ 15 letters). Overall, mean central retinal thickness, hard exsudates and leakage in FFA did not change significantly (p>0.05) while improvement of BCVA correlated with a reduction of hard exsudates and central retinal thickness. Specificity and sensitivity of detecting the angiographic visible threshold of RPE damage by optoacoustic measurements were 86% and 70%, respectively. No adverse effects or pain were noted during or after treatment.
CONCLUSION: SRT is an effective and safe treatment of DME with functional and anatomical improvement or stabilization in most patients. Optoacoustic measurements are suitable to detect the individual threshold of RPE damage.
Study Type
Enrollment (Actual)
Phase
- Phase 2
- Phase 1
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Minimum age of 18 years and the presence of clinically significant DME according to the criteria of the ETDRS study
Exclusion Criteria:
- Ischemic diabetic macular edema, significant media opacity compromising the interpretation of fluorescein angiography and fundus photography, previous intraocular surgery, previous macular laser treatment, other retinal or ocular diseases, and known allergic hypersensitivity to fluorescein, indocyanine green, or iodine. General exclusion criteria included pregnancy or breast-feeding and significant medical conditions such as renal failure.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: selective retina therapy (SRT)
Focal laser treatment with an SRT-Laser which selectively affects the retinal pigment epithelium while sparing the photoreceptor layer.
|
laser treatment
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
best-corrected visual acuity
Time Frame: 2 years
|
2 years
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
change of retinal thickness, presence of hard exudates and leakage in FFA, specificity and sensitivity of optoacoustic measurements
Time Frame: 2 years
|
2 years
|
Collaborators and Investigators
Investigators
- Principal Investigator: Jost Hillenkamp, MD, Dept. of Ophthalmology, University Medical Center Schleswig-Holstein, Kiel Campus
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- SRT-1
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.
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