Clinical trials: Retinal Blood Vessels
Diabetes Mellitus, Type 1, Hypertension
Correlation of Flicker Induced and Flow Mediated Vasodilatation in Patients With Endothelial Dysfunction and Healthy Volunteers.
A couple of studies have shown that illuminating the eye with diffuse flickering light is accompanied by an increase of retinal vessel diameters, optic nerve head blood flow and retinal blood flow.
- Conditions
- Diabetes Mellitus, Type 1, Hypertension, Hypercholesterolemia, Regional Blood Flow
- Trial name
- NCT00432029
- Testing
- Forearm blood flow measurement, Flow mediated dilation (FMD), Zeiss Retinal Vessel Analyzer (RVA), Stimulation with Flicker-light
- Where
- Austria
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Amblyopia, Regional Blood Flow
Amblyopia and Neurovascular Coupling in the Retina of Humans
The visual disorder of amblyopia affects 2% to 3% of the population. Amblyopia is a developmental condition that is characterized by reduced vision of the eye due to the presence of a sensory impediment during visual development…
- Trial name
- NCT00312390
- Testing
- Flicker, Retinal Vessel Diameter, Retinal Blood Flow
- Where
- Austria
- Volunteers
- healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Retinal Artery Occlusion, Retinal Vein Occlusion
Changes in the Diameter of Retinal Vessels After Remote Ischemic Conditioning
Remote ischemic conditioning (RIC) is a therapeutic strategy for protecting organs or tissue against the detrimental effects of acute ischemia-reperfusion injury.
- Trial name
- NCT02898480
- Testing
- Remote ischemic conditioning
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Aarhus
Central Retinal Vein Occlusion
Retinal Blood Flow in Response to an Intravitreal Injection of Ranibizumab for Central Retinal Vein Occlusion (CRVO)
Ranibizumab (Lucentis, Genentech) is an off-label drug used for the clinical treatment of central retinal vein occlusion, which is one of the most common retinal vascular disorders.
- Trial name
- NCT01303276
- Where
- Canada
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- University of Toronto
Arthritic Psoriasis, Psoriasis (PsO)
Retinal Capillary Vessel Density and Foveal Avascular Zone Size in Patients With Psoriatic Arthritis: A Case-Control Study.
In terms of blood flow per unit of tissue, the retina is one of the tissues with the highest blood flow in the body. Parameters such as the thickness of the choroid layer, which plays a crucial role in maintaining normal eye…
- Conditions
- Arthritic Psoriasis, Psoriasis (PsO), Retinal Vessels
- Trial name
- PsA-RETINA (NCT07858591)
- Testing
- OCTA-SCP, OCTA-DCP, OCTA-RPC
- Where
- Turkey (Türkiye)
- Volunteers
- 135 people, healthy volunteers welcome
- Sponsor
- Bursa Yuksek Ihtisas Training and Research Hospital
Microvascular Disease, Retinal Disease
Collecting Data on Retinal Blood Blood Flow and Blood Vessel Shape/Appearance Using an Investigational Device, XyCAM CRE, and to Then Compare Those Images With Images Collected From a Patient's Routine Clinical Examination.
The primary objective of the XyCAM CRE Camera Study is to evaluate retinal blood flow, choroidal blood flow, and retinal structural features and their association with the progression and characterization of retinal diseases…
- Trial name
- NCT07641738
- Testing
- XyCAM CRE Imaging
- Where
- United States
- Volunteers
- 350 people, healthy volunteers welcome
- Sponsor
- Stuart Terry Eye Associates
Proliferative Diabetic Retinopathy, Diabetic Macular Edema
Effectiveness of Multimodal Imaging for the Evaluation of Retinal Oedema And New vesseLs in Diabetic Retinopathy
Given the high number of people with DMO and PDR, the need for patients to be seen at short follow-up intervals, the need for frequent treatments and the requirement for long-term follow-up, there is a very large workload in…
- Trial name
- EMERALD (NCT03490318)
- Where
- 13 sites in United Kingdom
- Volunteers
- 401 people, healthy volunteers welcome
- Sponsor
- Belfast Health and Social Care Trust
Branch Retinal Artery Occlusion, Central Retinal Artery Occlusion
Retinal Oxygen Saturation, Blood Flow, Vascular Function and High Resolution Morphometric Imaging in the Living Human Eye
Canadians fear loss of vision more than any other disability. Vision loss has an enormous impact on quality-of-life and is extremely costly from a societal and economic perspective.
- Conditions
- Branch Retinal Artery Occlusion, Central Retinal Artery Occlusion, Branch Retinal Vein Occlusion, Central Retinal Vein Occlusion
- Trial name
- NCT01348633
- Where
- Canada
- Volunteers
- 275 people, healthy volunteers welcome
- Sponsor
- University of Toronto
Amblyopia ex Strabismus, Amblyopia ex Anisometropia
Neurovascular Coupling in Subjects With Amblyopia
Amblyopia is a developmental condition that is characterized by reduced vision of the eye due to the presence of a sensory impediment during visual development, such as strabismus (ocular misalignment) or anisometropia (unequal…
- Trial name
- NCT01746693
- Testing
- Dynamic Vessel Analyzer, Laser Doppler Velocimetry, 7-Tesla MRI
- Where
- Austria
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Diabetes Complications, Diabetic Retinopathy
Human iPSC for Repair of Vasodegenerative Vessels in Diabetic Retinopathy
This study proposes to carefully examine the hypothesis that human inducible pluripotent stem cells (iPSCs) can be effectively employed as a future therapeutic option for individuals with diabetic retinopathy and macular…
- Trial name
- iPSC (NCT03403699)
- Testing
- Generation of inducible pluripotent stem cells
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Alabama at Birmingham
Retinal Hypoxia
The Mechanisms of Diameter Changes in Retinal Vessels During Hypoxia
The primary objective is to study if a stimulation of nitric oxide and/or prostaglandin affect the diameter changes of retinal vessels during hypoxia. Diameter changes are studied using the Dynamic Vessel Analyzer.
- Trial name
- NCT02059018
- Testing
- COX-inhibitor, Nitroglycerin, COX-inhibitor + Nitroglycerin
- Where
- Denmark
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- University of Aarhus
Hypertensive Retinopathy
Non-invasive Measurement of Retinal Blood Flow Based on Vessel Analysis and Fourier Domain Optical Coherence Tomography in Patients With Hypertensive Retinopathy
Recently, a new and sophisticated method for assessment of retinal blood flow and retinal blood flow velocity profiles has become available.
- Trial name
- NCT01753648
- Testing
- Dynamic Vessel Analyzer, FDOCT, Ocular perfusion pressure
- Where
- Austria
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Healthy
Measurement of the Eye's Blood Vessels Using the Dynamic Vessel Analyzer (DVA)
The purpose of this research study is examine the response of the blood vessels in the eye to a light flicker stimulus using the Dynamic Vessel Analyzer (DVA) on two separate days in healthy individuals.
- Trial name
- NCT00783029
- Where
- United States
- Volunteers
- 87 people, healthy volunteers welcome
- Sponsor
- Penn State University
Chorioretinal Disorders in Diseases Classified Elsewhere
Measurement of the Oxygen Saturation in the Retinal Vessels With Oxymap
Retinal oximetry can be measured with newly developed Oxymap (Oxymap ehf, Reykjavik, Iceland). Briefly, the device simultaneously acquires digital images at two wavelengths and automatically tracks retinal vessels on both images.
- Trial name
- NCT02318641
- Testing
- oximetry
- Where
- Japan
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Kagawa University
Sexual Desire
Effects of Glucagon-like-Peptide-1 Analogues on Sexuality
This study is to investigate the effects of GLP-1 analogues (combined with lifestyle interventions in comparison to lifestyle interventions only) on sexual desire, mood, quality of life, the reproductive axis, retinal vessel…
- Trial name
- Desire PLUS (NCT05598008)
- Where
- Switzerland
- Volunteers
- 85 people, healthy volunteers welcome
- Sponsor
- University Hospital, Basel, Switzerland
Cadasil
AusCADASIL: An Australian Cohort of CADASIL
The aim of this project is to establish an Australian cohort of patients diagnosed with Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy (CADASIL).
- Trial name
- NCT06148051
- Where
- 5 sites in Australia
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Perminder Sachdev
Diabetic Retinopathy
Evaluation of Blood-retinal Barrier Functional Alterations by Optical Coherence Tomography
The purpose of this study is to identify alterations of the blood-retinal barrier (BRB) in diabetic retinas using a novel non-invasive approach based on the Fourier domain high-definition optical coherence tomograph (OCT).
- Trial name
- CNTM025A OCT (NCT01220804)
- Where
- Portugal
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Association for Innovation and Biomedical Research on Light and Image
Preeclampsia (PE), Hypertension ,Pregnancy
Retinal and Choroidal Microcirculation in Preeclampsia: An OCTA Study
Preeclampsia is a multisystemic and multifactorial disorder that complicates pregnancy and is characterized by new-onset hypertension after the 20th week of gestation accompanied by proteinuria or systemic findings such as renal…
- Conditions
- Preeclampsia (PE), Hypertension ,Pregnancy, Retinal Microvascular Changes, Hypertensive Disorders of Pregnancy
- Trial name
- PE-OCTA (NCT07874191)
- Where
- Turkey (Türkiye)
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Muğla Sıtkı Koçman University
Diabetes Mellitus, Type 1, Diabetic Retinopathy
Choroidal Blood Flow Changes During Dark/Light Transitions in Patients With Insulin-dependent Diabetes Mellitus (IDDM)
There is evidence from a variety of animal studies that choroidal blood flow is under neural control. Recent results in humans indicate that a light/dark transition is associated with a short lasting reduction in choroidal blood…
- Trial name
- NCT00718614
- Testing
- Light will be switched from 0.5µW/cm2/sr to 115µW/cm2/sr.
- Where
- Austria
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Cardiovascular Disease, Childhood Obesity
Exercise and Arterial Modulation in Youth
The project is designed as a large scale, cross-sectional study. The aim of the study is to investigate the association of micro- and macrovascular function with physical fitness and body composition in primary school children.
- Conditions
- Cardiovascular Disease, Childhood Obesity, Hypertension, Endothelial Dysfunction
- Trial name
- ExAMIN YOUTH (NCT02853747)
- Testing
- Physical Activity, 20-meter shuttle run
- Where
- Switzerland
- Volunteers
- 337 people, healthy volunteers welcome
- Sponsor
- University of Basel