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Ocular Blood Flow in Glaucoma Patients - the Leuven Eye Study

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01840202
First Posted: April 25, 2013
Last Update Posted: May 29, 2015
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Universitaire Ziekenhuizen Leuven
  Purpose

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)


Condition
Open Angle Glaucoma Normal Tension Glaucoma

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Cross-Sectional
Official Title: Correlation Between Submacular and Peripapillary Choroidal Tissue and Ocular Blood Flow in Glaucoma Patients

Resource links provided by NLM:


Further study details as provided by Universitaire Ziekenhuizen Leuven:

Primary Outcome Measures:
  • 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 ]

Enrollment: 770
Study Start Date: February 2013
Study Completion Date: December 2014
Primary Completion Date: December 2014 (Final data collection date for primary outcome measure)
Groups/Cohorts
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

Detailed Description:
  1. Demographic and clinical ophthalmology-related examination data will be collected, including intraocular pressure measurement using dynamic contour tonometry
  2. Visual field testing will be performed.
  3. Structural damage will be documented by a retinal nerve fiber layer analysis (through Heidelberg Retinal Tomograph)
  4. High Definition Optical coherent tomograph imaging of the submacular and peripapillary choroidal thickness will be performed.
  5. Color Doppler Imaging of the retrobulbar vessels will be performed, with analysis of the Doppler waveform (peak systolic, end diastolic velocities and resistivity index)
  6. Retinal oximetry will be performed with the analysis of the arterial and venous saturations of retinal vessels
  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
Tertiary referral center
Criteria

Inclusion Criteria:

  • 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

Exclusion Criteria:

  • history of ocular trauma
  • intraocular surgery (except for cataract surgery)
  • eye disease (except glaucoma)
  • systemic diseases with ocular involvement like diabetes
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01840202


Locations
Belgium
UZ Leuven
Leuven, Vlaams-Brabant, Belgium, 3000 Leuven
Sponsors and Collaborators
Universitaire Ziekenhuizen Leuven
Investigators
Principal Investigator: Ingeborg Stalmans, MD, PhD UZ Leuven
  More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Universitaire Ziekenhuizen Leuven
ClinicalTrials.gov Identifier: NCT01840202     History of Changes
Other Study ID Numbers: S140213
First Submitted: April 17, 2013
First Posted: April 25, 2013
Last Update Posted: May 29, 2015
Last Verified: January 2013

Additional relevant MeSH terms:
Glaucoma
Glaucoma, Open-Angle
Low Tension Glaucoma
Ocular Hypertension
Eye Diseases
Optic Nerve Diseases