- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05241938
PSLT Compared to Prostaglandin Analogue Eye Drops
Computer-guided Selective Laser Trabeculoplasty (PSLT) in the Treatment of Ocular Hypertension and Open-angle Glaucoma Compared to Prostaglandin Analogue Eye Drops: a Non-inferiority Randomized Clinical Trial
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Patients with a diagnosis of ocular hypertension or bilateral glaucoma, naive or on treatment with up to two classes of hypotensive eye drops will be invited to participate in the study.
These patients will have both eyes included in the study. A randomization will be made to allocate one eye to receive treatment with PSLT (treatment group), while the contralateral eye will receive treatment with prostaglandin eye drops (control).
Patients will be followed up for 12 months and periodically tonometry, computerized perimetry, water overload test and OCT will be performed.
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Helena Pakter, MD, PhD
- Phone Number: +55-51-991226968
- Email: Hmpakter@hcpa.edu.br
Study Contact Backup
- Name: Rafaela Almeida, MD
- Email: rafaelacamposdealmeida@gmail.com
Study Locations
-
-
RS
-
Porto Alegre, RS, Brazil
- Recruiting
- Universidade Federal do Rio Grande do Sul
-
Contact:
- Helena M Pakter, MD, PhD
- Email: hmpakter@hcpa.edu.br
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Diagnosis of ocular hypertension (IOP ≥ 24 mmHg in both eyes) or diagnosis of open-angle glaucoma (POAG) in both eyes
- Proper visualization of angle structures and 360 degree open angles in both eyes
- No previous intraocular surgery with the exception of phacoemulsification with intraocular lens implantation
- No use of systemic medications known to increase IOP
Exclusion Criteria:
- Patients using more than two glaucoma medications
- Evidence of any other eye disease that could affect IOP measurement
- Diagnosis of other types of glaucoma
- Patient with mean deviation (MD) less than -12 decibels (dB) on visual perimetry (severe disease)
- Patients with unilateral glaucoma
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Pattern Selective Laser Trabeculoplasty
PSLT will be performed using the Pascal Streamline 577 laser (Topcon Inc., Tokyo, Japan).
The laser spot is directed at the anterior chamber angle encompassing the pigmented and non-pigmented trabecular meshwork.
Laser power is titrated by placing a laser mark in the lower quadrant with an exposure duration of 10 milliseconds (ms).
The initial energy of 500 megawatts (mW) is selected and the power is reduced or increased until a slight whitening of the trabecular meshwork is minimally noticed.
This power is then maintained and the pulse duration is automatically reduced to 5ms to produce invisible injury.
The treatment is administered in 32 steps, each pattern consists of 36 stitches: 3 rows of 13 stitches each (total of 1152), with zero space between adjacent stitches.
|
PSLT will be performed under topical anesthesia (proxymetacaine hydrochloride 5mg/ml eye drops) using a mirrored gonioscopy lens (Latina Ocular Instruments).
A α2 agonist hypotensive eye drops (0.2% brimonidine tartrate) and 2% pilocarpine eye drops are applied 40 minutes before the procedure.
After laser treatment, the patient will be instructed to use non-steroidal anti-inflammatory eye drops (thrice daily for 7 days).
Other Names:
|
Active Comparator: Prostaglandin analogue eye drops
Prostaglandin analogue eye drops (latanoprost, bimatoprost or travoprost) will be prescribed
|
Prostaglandin analogue eye drops will be prescribed to be used continuously once a day in the fellow eye.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Intraocular pressure change
Time Frame: 1 week, 2 months, 9 months, 12 months
|
Intra-ocular pressure change will be similar in both groups
|
1 week, 2 months, 9 months, 12 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Structural damage
Time Frame: 1 week, 9 months, 12 months
|
Changes in nerve fiber layer and ganglion cell layer thickness as measured by OCT will be assessed
|
1 week, 9 months, 12 months
|
Functional damage
Time Frame: 1 week, 9 months, 12 months
|
Changes in visual function as measured by computerized perimetry will be assessed
|
1 week, 9 months, 12 months
|
Collaborators and Investigators
Investigators
- Principal Investigator: Helena Pakter, MD. PhD, UFGRS
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 44489320.7.0000.5327
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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.
Clinical Trials on Ocular Hypertension
-
Western Galilee Hospital-NahariyaUnknown
-
Laboratoires TheaCompletedOcular Hypertension GlaucomaBulgaria
-
Santen Inc.Completed
-
West Virginia UniversityUniversity of PittsburghRecruitingGlaucoma and Ocular HypertensionUnited States, United Kingdom, Canada
-
University Hospital, GenevaTerminatedGlaucoma and Ocular HypertensionSwitzerland
-
Santen Inc.Completed
-
Maastricht University Medical CenterCompletedCorticosteroid Induced Ocular Hypertension/GlaucomaNetherlands
-
Santen Inc.CompletedA Study Assessing the Safety and Efficacy of DE-117 Ophthalmic Solution in Patients With POAG or OHTGlaucoma and Ocular HypertensionUnited States
-
Bausch & Lomb IncorporatedCompletedGlaucoma | Open Angle or Ocular HypertensionUnited States
-
Nicox Ophthalmics, Inc.CompletedGlaucoma, Open-Angle | Hypertension, OcularUnited States