Clinical trials: Vasoconstriction
Hemorrhage, Postpartum, Hemorrhage
A Pilot Study to Assess the Feasibility and Tolerability of the AccuFlow Perfusion Sensor for Intrapartum Hemorrhage
Obstetric hemorrhage is one of the leading causes of maternal death worldwide. One of the challenges in management of hemorrhage is that young, healthy women compensate for blood loss via peripheral vasoconstriction, so they…
- Conditions
- Hemorrhage, Postpartum, Hemorrhage, Vasoconstriction
- Trial name
- NCT04370639
- Testing
- AccuFlow sensor, Survey
- Where
- United States
- Volunteers
- 25 people, healthy volunteers welcome
- Sponsor
- Megan Lord
Healthy
The Validity of Retinal Blood Flow Measurements During Hyperoxia in Humans Using Fourier Domain Color Doppler Optical Coherence Tomography (CDOCT)
Noninvasive monitoring of blood flow in retinal circulation may elucidate the progression and treatment of ocular disorders, including diabetic retinopathy, age-related macular degeneration and glaucoma.
- Trial name
- NCT00431600
- Testing
- 100% Oxygen
- Where
- Austria
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Oxidative Stress, Inflammation
Effect of Dietary Supplemental Fish Oil in Alleviating Health Hazards Associated With Air Pollution
This study aims to evaluate whether dietary supplementation with fish oil can protect against the cardiopulmonary alterations linked to air pollution
- Conditions
- Oxidative Stress, Inflammation, Blood Pressure, Vasoconstriction
- Trial name
- NCT03255187
- Testing
- Fish oil supplementation, Sunflower seed oil supplementation
- Where
- China
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Fudan University
Vasodilation, Vasoconstriction
Vascular Function Improvements After Chronic Passive Stretching
Acutely, during different bouts of passive stretching (PS), blood flow (Q ̇) and shear rate ( ) in the feeding artery of the stretched muscles increases during the first two elongations and then it reduces during the following…
- Conditions
- Vasodilation, Vasoconstriction, Stretch, Sympathetic; Imbalance
- Trial name
- NCT04271241
- Testing
- Passive stretching (PS) training
- Where
- Italy
- Volunteers
- 39 people, healthy volunteers welcome
- Sponsor
- University of Milan
Healthy
Impact of Dietary Flavanols on Microvascular Function in Young Females During Mental Stress
The aim of this project is to examine whether flavonoids, which are small molecules naturally present in cocoa, as well as fruits and vegetables such as berries, tea, citrus fruits, apple (typically responsible for giving these…
- Trial name
- NCT07864545
- Testing
- High-flavanol cocoa powder, Low-flavanol cocoa powder
- Where
- United Kingdom
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- University of Birmingham
Hypoxic Pulmonary Vasoconstriction
Effects of Iloprost on Hypoxic Pulmonary Vasoconstriction at Altitude
The objective of this study is to determine if single dose administration of inhaled iloprost will reduce pulmonary artery pressure, reduce hypoxic pulmonary vasoconstriction and improve arterial oxygenation at rest and during…
- Trial name
- NCT00724321
- Testing
- iloprost
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Loma Linda University
Vasoconstriction, Oral Soft Tissue Conditions
Evidence of Spreading Vasoconstriction in Human Gingiva
The aim of this study is to observe the mechanism of spreading vasoconstriction in human healthy gingiva. Epinephrine solution is applied on the attached gingiva in group "A" and on the surface of the tooth next to the ginvial…
- Conditions
- Vasoconstriction, Oral Soft Tissue Conditions, Dental and Gingival Conditions
- Trial name
- NCT04131283
- Testing
- Epinephrine
- Where
- Hungary
- Volunteers
- 29 people, healthy volunteers welcome
- Sponsor
- Semmelweis University
Cold Exposure
The Influence of Race and MitoQ Supplementation on Skin Blood Flow in the Cold
Individuals who operate in cold weather are at risk of developing cold injuries, for example, frostbite. They also often experience a loss of hand function and joint mobility due to a decrease in skin temperature and blood flow.
- Trial name
- NCT06784531
- Testing
- Mitoquinone mesylate (MitoQ), Cold Water Hand Immersion, Cold Air Exposure
- Where
- United States
- Volunteers
- 26 people, healthy volunteers welcome
- Sponsor
- United States Army Research Institute of Environmental Medicine
Reversible Cerebral Vasoconstriction Syndrome
Endothelial Dysfunction in Reversible Cerebral Vasoconstriction Syndrome
Reversible Cerebral Vasoconstriction Syndrome (RCVS) is a syndrome described at the end of the 20th century. Generally, it has a benign course.
- Trial name
- DESS (NCT04463212)
- Where
- France
- Volunteers
- 62 people, healthy volunteers welcome
- Sponsor
- Nantes University Hospital
Obesity, Healthy
Sex Disparities in Hypoxic Sympatholysis and Impact of Obesity
Patients with sleep apnea are at increased risk of developing cardiovascular disease - with women at potentially greater risk than men.
- Conditions
- Obesity, Healthy, Vasoconstriction, Vasodilation
- Trial name
- NCT04436731
- Testing
- Cold Pressor Test
- Where
- United States
- Volunteers
- 73 people, healthy volunteers welcome
- Sponsor
- University of Missouri-Columbia
Vasodilation, Vasoconstriction
The Impact of Carbon Monoxide and Altitude on Vascular Function
The CarMA (Carbon Monoxide and Altitude) Study aims to observe the vascular effects of carbon monoxide exposure at low and high altitudes.
- Trial name
- CarMA (NCT04928183)
- Testing
- Carbon monoxide rebreathe, Sodium Nitroprusside, Phenylephrine Hydrochloride
- Where
- Canada
- Volunteers
- 19 people, healthy volunteers welcome
- Sponsor
- University of Alberta
Hyperinsulinemia
Effect of Insulin on Endothelin-Dependent Vascular Tone in the Forearm Circulation
Previous studies have shown that insulin may stimulate the release of endothelin (ET) from endothelial cells. This mechanism may contribute to the adverse vascular effects determined by chronic hyperinsulinemia.
- Trial name
- NCT00001624
- Testing
- Insulin
- Where
- United States
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)