Clinical trials: Microvascular Circulation
Healthy Volunteers
Mechanisms of Human Cutaneous Microcirculation in Healthy Volunteers
Microvascular dysfunctions are critical events in several diseases including diabetes. This study will develop a methodology for microvascular investigation in human skin.
- Trial name
- NCT00152724
- Testing
- pressure strain system, iontophoresis, scopolamin, emla
- Where
- France
- Volunteers
- 85 people, healthy volunteers welcome
- Sponsor
- University Hospital, Angers
Microcirculation, Metabolism
Investigation of the Influence of Careless™, a Mangifera Indica Fruit Powder, on Microcirculation and Endothelial Function
Investigation of the acute effects of a single dose of Careless™, a Mangifera indica fruit powder on cutaneous microcirculation and endothelial function.
- Conditions
- Microcirculation, Metabolism, Cardiovascular Disease
- Trial name
- NCT02511899
- Testing
- Mango fruit powder
- Where
- Germany
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Vital Solutions Swiss AG
Altitude Hypoxia, Perfusion; Complications
The Pre-acclimatization Augmented Extreme Altitude Expedition
The aim of this study is to investigate the effect of pre-acclimatization in a nitrogen tent at home, ventilated with a slightly increased nitrogen percentage, in preparation for an expedition at extreme altitude.
- Trial name
- PRAGMAX (NCT05517044)
- Testing
- Nitrogen tent preacclimatization to high altitude
- Where
- Switzerland
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- University of Zurich
Aging Problems
Vascular Aging and Microcirculation: Physiological Aspects of Vascular Aging in the Elderly Population (VAMP-Aging)
Rising life expectancy worldwide challenges public health due to increased cardiovascular disease linked to vascular aging, where microvascular dysfunction serves as an early indicator of system-wide inflammation, or…
- Trial name
- VAMP-Aging (NCT07563725)
- Testing
- Laser Speckle Contrast Imaging, Handgrip Dynamometry (Muscle Strength), Sit-to-Stand Test (5-Times Sit-to-Stand - 5STS)
- Where
- Brazil
- Volunteers
- 62 people, healthy volunteers welcome
- Sponsor
- National Institute of Cardiology, Laranjeiras, Brazil
Spinal Cord Injury, Insulin Resistance
IR and Microvascular Blood Flow in SCI
Persons with spinal cord injury (SCI) are at an increased risk for metabolic disorders, including that of insulin resistance. As a result of neurological injury, they often have impaired mechanisms that regulate blood vessel…
- Trial name
- NCT02034331
- Testing
- Insulin iontophoresis, Acetylcholine Iontophoresis, Heat application
- Where
- United States
- Volunteers
- 68 people, healthy volunteers welcome
- Sponsor
- James J. Peters Veterans Affairs Medical Center
Microcirculation
Establishing Normal Ranges of Microcirculatory Function as Determined by CytoCam-IDF Imaging
When infection strikes, the body's immune system reacts by producing chemicals in the bloodstream and changes in white blood cells to attack the infecting organism (bacteria, viruses or other organisms) and prevent it spreading.
- Trial name
- NCT03044483
- Testing
- Measurement of sublingual microcirculatory parameters
- Where
- United Kingdom
- Volunteers
- 91 people, healthy volunteers welcome
- Sponsor
- University Hospitals, Leicester
E-cigarette Use, Microcirculation
The Acute Effects of E-cigarette Inhalation on Vascular Function, Microcirculation and Thrombosis
This is a human randomized controlled cross-over study where the effects of e-cigarette inhalation (with or without nicotine) on vascular function, microcirculation and thrombosis is assessed.
- Conditions
- E-cigarette Use, Microcirculation, Thrombosis, Vascular Function
- Trial name
- NCT04175457
- Testing
- e-cigarette
- Where
- Sweden
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Karolinska Institutet
Metabolic Syndrome
NWT03 and Arterial Stiffness
Rationale: Subjects with the metabolic syndrome have an increased risk of developing cardiovascular disease and a twofold risk of developing hypertension.
- Trial name
- NCT02561663
- Testing
- NWT-03, an egg-white protein hydrolysate
- Where
- Netherlands
- Volunteers
- 79 people, healthy volunteers welcome
- Sponsor
- Newtricious R&D BV
Physiology, Ocular, Microcirculation
Role of Nitrogen Oxide (NO) in the Control of Choroidal Blood Flow During a Decrease in Ocular Perfusion Pressure
Autoregulation is the ability of a vascular bed to maintain blood flow despite changes in perfusion pressure. For a long time it had been assumed that the choroid is a strictly passive vascular bed, which shows no autoregulation.
- Conditions
- Physiology, Ocular, Microcirculation, Regional Blood Flow, Autoregulation
- Trial name
- NCT00810927
- Testing
- Suction cup application, Laser Doppler flowmetry, Measurement of intraocular pressure
- Where
- Austria
- Volunteers
- 22 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Gingival Vascularization, Oral Soft Tissue Wound Healing
Analysis of the Reliability and Validity of Laser Speckle Contrast Imaging
This study is designed to validate laser speckle contrast imaging (LSCI) as a non-invasive method for measuring superficial gingival blood perfusion.
- Conditions
- Gingival Vascularization, Oral Soft Tissue Wound Healing, Laser Speckle Contrast Imaging, Periodontal Wound Healing
- Trial name
- LSCI (NCT07527351)
- Testing
- Laser Speckle Contrast Imaging
- Where
- Spain
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Universidad Complutense de Madrid
NIRS, Tissue Oxygenation
CHECK-NIRS2D-Study
The study investigates how external, physiological, and behavioral factors influence the measurement of regional tissue oxygenation using two-dimensional near-infrared spectroscopy (NIRS) imaging in healthy volunteers.
- Conditions
- NIRS, Tissue Oxygenation, Microvascular Perfusion, Vascular Occlusion Test
- Trial name
- NCT07854431
- Where
- Germany
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Heinrich-Heine University, Duesseldorf
Thrombophilia
Arterial Microcirculation, Macrocirculation and Thrombophilias
Rationale: To analyse the arterial state of women with thrombophilia by techniques studying micro and arterial macrocirculation because of a reported and still discussed increase risk in cardio-vascular events in these women.
- Trial name
- MICMAC (NCT01160159)
- Testing
- Tests, Healthy volunteers
- Where
- France
- Volunteers
- 6 people, healthy volunteers welcome
- Sponsor
- Assistance Publique - Hôpitaux de Paris
Nitric Oxide, Vasodilation
Evidence of Spreading Vasodilation in Human Gingiva
The aim of this study is to observe the mechanism of spreading vasodilatation on human healthy gingiva. Nitric-oxide donor solutions in lower and higher concentration are used to trigger the vasoactivity.
- Conditions
- Nitric Oxide, Vasodilation, Oral Soft Tissue Conditions
- Trial name
- NCT03605095
- Testing
- nitroglycerin
- Where
- Hungary
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Semmelweis University
Healthy
Effect of Oral Sildenafil With Digital Therapeutic Iontophoresis of Sodium Nitroprussiate in Healthy Volunteers
Iontophoresis is a employed to facilitate drug absorption without systemic effect. This study investigates cutaneous microcirculation when we associate sildenafil per os with SNP via iontophoresis.
- Trial name
- INFLUX-VS (NCT00710099)
- Testing
- sildenafil, nitroprussiate iontophoresis
- Where
- France
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- University Hospital, Grenoble
Healthy Volunteers
The Relationship Between Cardiac Output and Microvascular Visceral Blood Flow
Although major surgery is often required to treat abdominal problems, there is a significant risk of death or complication following these operations.
- Trial name
- NCT02167178
- Testing
- Administration of 0.9% NaCl solution, Measurement of stroke volume, Measurement of microvascular blood flow
- Where
- United Kingdom
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- University of Nottingham
Chronic Kidney Disease Patients
Glycocalyx and Oxidative Stress in Endothelial Function (Part 1)
The primary research objective of the project is to determine the role of eGC in microvascular reactivity in CKD (cross-sectional study 1).
- Trial name
- GlikoOxEND (NCT07437729)
- Where
- Croatia
- Volunteers
- 105 people, healthy volunteers welcome
- Sponsor
- Josip Juraj Strossmayer University of Osijek
Diabetes Type 2, Diabetic Neuropathies
High vs Low Dose Vitamin D in Patients With Diabetic Peripheral Neuropathy
Aim. To assess the effect of different doses of vitamin D supplementation on peripheral neuropathy in patients with type 2 diabetes mellitus (T2DM).
- Conditions
- Diabetes Type 2, Diabetic Neuropathies, Vitamin D Deficiency
- Trial name
- NCT04377399
- Testing
- Vitamin D
- Where
- Russia
- Volunteers
- 68 people, healthy volunteers welcome
- Sponsor
- Federal State Budgetary Institution, V. A. Almazov Federal North-West Medical Research Centre, of the Ministry of Health
Regional Blood Flow
Dysfunction of Nutritive Blood Flow as a Determinant of Anabolic Resistance in Older People
With age, muscles tend to waste at 0.5-1% per year, so that an 80 year old may have only 70% of the muscle possessed at 50. Muscle loss makes it harder to carry out tasks that require strength, keep the body balanced and continue…
- Trial name
- Dunhill01 (NCT01734616)
- Testing
- Old Exercise, Old Acute Cocoa, Old 7 Day Cocoa
- Where
- United Kingdom
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- University of Nottingham
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
Microcirculation, Photoplethysmography
Evaluation of Microcirculation With Photoplethysmography (Pulse Oximetry) in Healthy Volunteers and Ventilated Patients
The objective of this observational study is to explore microcirculation in healthy volunteers and in ventilated patients in the operating room and in critical care.
- Trial name
- NCT06141681
- Testing
- photoplethysmography
- Where
- Argentina
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Hospital Privado de Comunidad de Mar del Plata