Open Angle GlaucomaNCT01840202
Ocular Blood Flow in Glaucoma Patients - the Leuven Eye Study
An observational study of Open Angle Glaucoma and Normal Tension Glaucoma, run by Universitaire Ziekenhuizen KU Leuven at 1 site in Belgium.
Trial summary
Glaucoma is a leading cause of blindness worldwide, whose treatment - intraocular pressure lowering - is only partially effective in preventing disease progression. Accordingly, other variables, such as ocular blood flow-related factors, have been implicated in disease pathogenesis. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Open Angle Glaucoma, Normal Tension Glaucoma
- How many people
- 770 participants
- Where
- 1 siteBelgium
- Study dates
- Feb 2013to Dec 2014
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Tertiary referral center
Who may be able to join
- individuals over 18 years old
- willing to sign an informed consent and able to comply with the requirements of the study
- having no other ocular diseases besides glaucoma
Who cannot join
- history of ocular trauma
- intraocular surgery (except for cataract surgery)
- eye disease (except glaucoma)
- systemic diseases with ocular involvement like diabetes
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Correlation Between Submacular and Peripapillary Choroidal Tissue and Ocular Blood Flow in Glaucoma Patients
Glaucoma is a leading cause of blindness worldwide, whose treatment - intraocular pressure lowering - is only partially effective in preventing disease progression. Accordingly, other variables, such as ocular blood flow-related factors, have been implicated in disease pathogenesis. However, most findings involving vascular variables come from partial, small-scale studies. Furthermore, recent technological advances have identified a number of ocular blood flow variables that have yet to be tested in large scale trials. Therefore, a study that specifically aims at uncovering the role of vascular aspects in glaucoma is needed.
For this purpose, a cross-sectional, observational case-control study will be conducted in the University Hospitals Leuven. This will be the largest-yet study on the subject, involving more than 750 patients. This will allow the creation of a specific cohort of patients where the vascular aspects are thought to be particularly important (low-tension glaucoma). It will use the largest combination yet of vascular-related measuring techniques (dynamic contour tonometry, optic coherent tomography, colour Doppler imaging and retinal oximetry)
Read the detailed description
- Demographic and clinical ophthalmology-related examination data will be collected, including intraocular pressure measurement using dynamic contour tonometry
- Visual field testing will be performed.
- Structural damage will be documented by a retinal nerve fiber layer analysis (through Heidelberg Retinal Tomograph)
- High Definition Optical coherent tomograph imaging of the submacular and peripapillary choroidal thickness will be performed.
- Color Doppler Imaging of the retrobulbar vessels will be performed, with analysis of the Doppler waveform (peak systolic, end diastolic velocities and resistivity index)
- Retinal oximetry will be performed with the analysis of the arterial and venous saturations of retinal vessels
- Conditions
- Open Angle Glaucoma, Normal Tension Glaucoma
- Medical subject headings
- Glaucoma, Open-Angle, Low Tension Glaucoma
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Control | Healthy volunteers with no family history of glaucoma, an increased or asymmetrical cup/disc ratio or any other optic disc structural change (notching, disc hemorrhage) or an intraocular pressure (IOP) above 21 mmHg that could suggest possible glaucoma suspects. | |
| Primary open-angle glaucoma | Patients with a characteristic optic disc damage (based on cup/disc ratio, thinning of neuroretinal rim, notching, disk hemorrhages, etc.) and visual field defects, with at least one measurement of IOP of >21 mmHg required | |
| Normal Tension Glaucoma | Patients with a characteristic optic disc damage (based on cup/disc ratio, thinning of neuroretinal rim, notching, disk hemorrhages, etc.) and visual field defects, with at maximum recorded IOP of < 21 mmHg |
What is being measured
The primary outcome is the main question the study is designed to answer.
Comparison of the Retrobulbar Arteries Doppler Waveform between glaucoma patients and healthy controls
Measured: Participants will be followed for the duration of hospital stay, an expected average of 2 hours
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Apr 2013 (estimated)
- Study startFeb 2013
- Primary completionDec 2014
- Study completionDec 2014
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Open Angle GlaucomaStudies of the same condition, open and under way.
- More trials run by Universitaire Ziekenhuizen KU LeuvenThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Enrolment
- 770 participants (actual)
Sponsor and investigators
- Lead sponsor
- Universitaire Ziekenhuizen KU Leuven
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Ingeborg Stalmans, MD, PhD, Principal investigator, UZ Leuven
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01840202
- Sponsor's protocol ID
- S140213
- Status last verified
- Jan 2013
- First submitted
- 17 Apr 2013
- Last updated
- 29 May 2015
- Results posted
- No
- Data monitoring committee
- No
Publications
Van Keer K, Abegao Pinto L, Willekens K, Stalmans I, Vandewalle E. Correlation Between Peripapillary Choroidal Thickness and Retinal Vessel Oxygen Saturation in Young Healthy Individuals and Glaucoma Patients. Invest Ophthalmol Vis Sci. 2015 Jun;56(6):3758-62. doi: 10.1167/iovs.14-16225.
PubMed 26066744
Study at a glance
From the registry record, last updated by the sponsor on 29 May 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Correlation Between Submacular and Peripapillary Choroidal Tissue and Ocular Blood Flow in Glaucoma Patients
- ClinicalTrials.gov ID
- NCT01840202
- Acronym / sponsor ID
- S140213
- Conditions
- Open Angle Glaucoma, Normal Tension Glaucoma
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 770 participants (actual)
- Lead sponsor
- Universitaire Ziekenhuizen KU LeuvenUniversity, hospital or other
- Study start
- Feb 2013
- Primary completion
- Dec 2014 (actual)
- Study completion
- Dec 2014 (actual)
- First posted
- 25 Apr 2013 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Glaucoma is a leading cause of blindness worldwide, whose treatment - intraocular pressure lowering - is only partially effective in preventing disease progression. Accordingly, other variables, such as ocular blood flow-related factors, have been implicated in disease pathogenesis. However, most findings involving vascular variables come from partial, small-scale studies. Furthermore, recent technological advances have identified a number of ocular blood flow variables that have yet to be tested in large scale trials. Therefore, a study that specifically aims at uncovering the role of vascular aspects in glaucoma is needed.
For this purpose, a cross-sectional, observational case-control study will be conducted in the University Hospitals Leuven. This will be the largest-yet study on the subject, involving more than 750 patients. This will allow the creation of a specific cohort of patients where the vascular aspects are thought to be particularly important (low-tension glaucoma). It will use the largest combination yet of vascular-related measuring techniques (dynamic contour tonometry, optic coherent tomography, colour Doppler imaging and retinal oximetry)
Detailed description
- Demographic and clinical ophthalmology-related examination data will be collected, including intraocular pressure measurement using dynamic contour tonometry
- Visual field testing will be performed.
- Structural damage will be documented by a retinal nerve fiber layer analysis (through Heidelberg Retinal Tomograph)
- High Definition Optical coherent tomograph imaging of the submacular and peripapillary choroidal thickness will be performed.
- Color Doppler Imaging of the retrobulbar vessels will be performed, with analysis of the Doppler waveform (peak systolic, end diastolic velocities and resistivity index)
- Retinal oximetry will be performed with the analysis of the arterial and venous saturations of retinal vessels
Study design
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Control | – | –Healthy volunteers with no family history of glaucoma, an increased or asymmetrical cup/disc ratio or any other optic disc structural change (notching, disc hemorrhage) or an intraocular pressure (IOP) above 21 mmHg that could suggest possible glaucoma suspects. |
| Primary open-angle glaucoma | – | –Patients with a characteristic optic disc damage (based on cup/disc ratio, thinning of neuroretinal rim, notching, disk hemorrhages, etc.) and visual field defects, with at least one measurement of IOP of >21 mmHg required |
| Normal Tension Glaucoma | – | –Patients with a characteristic optic disc damage (based on cup/disc ratio, thinning of neuroretinal rim, notching, disk hemorrhages, etc.) and visual field defects, with at maximum recorded IOP of < 21 mmHg |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Tertiary referral center
Key inclusion criteria (3 listed)
- individuals over 18 years old
- willing to sign an informed consent and able to comply with the requirements of the study
- having no other ocular diseases besides glaucoma
Key exclusion criteria (4 listed)
- history of ocular trauma
- intraocular surgery (except for cataract surgery)
- eye disease (except glaucoma)
- systemic diseases with ocular involvement like diabetes
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Comparison of the Retrobulbar Arteries Doppler Waveform between glaucoma patients and healthy controls
Time frame: Participants will be followed for the duration of hospital stay, an expected average of 2 hours
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 May 2015.
- Derived from this study: PubMed 26066744Van Keer K, Abegao Pinto L, Willekens K, Stalmans I, Vandewalle E. Correlation Between Peripapillary Choroidal Thickness and Retinal Vessel Oxygen Saturation in Young Healthy Individuals and Glaucoma Patients. Invest Ophthalmol Vis Sci. 2015 Jun;56(6):3758-62. doi: 10.1167/iovs.14-16225.
Related trials for Open Angle Glaucoma
RecruitingPhase 2
A Phase 2a Study Comparing the Efficacy, Safety and Tolerability of Pregabalin Eye Drops Comparing With Timolol Eye Drops in Adults With Glaucoma or High Eye Pressure.
Primary Open - Angle Glaucoma (POAG), Ocular Hypertension (OHT)
Recruiting
The Acute Effect of Exercise Type And Timing on Ambulatory Blood Pressure and Intra-Ocular Pressure in Individuals With Glaucoma (The ACHIEVE-project).
Glaucoma Open-Angle Primary, Hypertension
RecruitingPhase 4
Adaptive Optics OCT Evaluation of Rhopressa's Effects on the Retinal Ganglion Cells in Glaucoma Patients
Open Angle Glaucoma (OAG), Glaucoma
RecruitingObservational study
PRESERFLO™ MicroShunt XI Observational PMCF Study With no Control Group
Primary Open Angle Glaucoma
Active, not recruitingObservational study
Glaucoma, Visual Field Loss, and Their Association With Life Space in Older Adults
Primary Open Angle Glaucoma
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ingeborg Stalmans, MD, PhD principal investigator
UZ Leuven
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Open Angle Glaucoma and Normal Tension Glaucoma, run by Universitaire Ziekenhuizen KU Leuven at 1 site in Belgium.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 29 May 2015. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Belgium. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Comparison of the Retrobulbar Arteries Doppler Waveform between glaucoma patients and healthy controls (time frame: Participants will be followed for the duration of hospital stay, an expected average of 2 hours). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01840202, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 May 2015.