Clinical trials: Blood Flow Velocity
Deep Vein Thrombosis, Pulmonary Embolism
Venous Blood Flow Velocity: Electrical Foot Stimulation Compared to Intermittent Pneumatic Compression of the Foot
Electrical stimulation of the foot can increase blood flow out of the leg. This increased blood flow can prevent blood clots from forming in the leg veins.
- Trial name
- NCT00114608
- Testing
- The Focus™ Neuromuscular Stimulation System
- Where
- United States
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- University at Buffalo
Diabetic Peripheral Neuropathy (DPN)
Ultrasound Assessment of Sciatic Nerve and Inferior Gluteal Artery in Diabetic Peripheral Neuropathy(DPN): Association With a Target Gene
Diabetic peripheral neuropathy (DPN) is a common and serious complication of diabetes that causes numbness, pain, and weakness, often starting in the feet.
- Trial name
- NCT07595887
- Testing
- No intervention (observational study)
- Where
- China
- Volunteers
- 120 people
- Sponsor
- Second Hospital of Shanxi Medical University
Hypotension on Induction
Carotid Artery Corrected Flow Time and Respiratory Variation of Blood Flow Peak Velocity for Prediction of Hypotension After Induction of General Anaesthesia in Adult Patients With Chronic Liver Disease
Baseline Measurements For the ultrasound parameters, it is the average of three readings In supine position . The investigators will continuously monitoring during induction and 10 minutes after.
- Trial name
- NCT07370103
- Where
- Egypt
- Volunteers
- 35 people, healthy volunteers welcome
- Sponsor
- Ain Shams University
Blood Flow Velocity, Autoregulation
The Effect of an α2-Adrenoceptor Antagonist (Yohimbine) on Dynamic Autoregulation in the Human Middle Cerebral Artery and Ophthalmic Artery
Blood flow autoregulation is defined as the ability of a tissue to maintain a relatively constant flow, despite moderate alterations in perfusion pressure.
- Conditions
- Blood Flow Velocity, Autoregulation, Ocular Physiology
- Trial name
- NCT00814047
- Testing
- Yohimbine hydrochloride
- Where
- Austria
- Volunteers
- 18 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Glucose, Insulin
Does Passive Movement Increase Glucose Uptake Into Muscle?
This study aims to examine the blood sugar response after a meal, and how three different movement protocols may impact the blood sugar level. Participants will visit the lab on three different occasions.
- Conditions
- Glucose, Insulin, Blood Flow Restriction Therapy, Blood Flow Velocity
- Trial name
- NCT06704126
- Testing
- Passive movement, Passive movement with blood flow restriction
- Where
- United Kingdom
- Volunteers
- 11 people, healthy volunteers welcome
- Sponsor
- Lancaster University
Spinal Anesthesia-induced Hypotension
Predicting if the Blood Pressure Will Drop After Spinal Anesthesia Using Ultrasound of the Neck
After a spinal injection, blood pressure might drop for a short time, similar to what happens with general anesthesia. This drop can be different for each person.
- Trial name
- NCT06711289
- Testing
- Carotid ultrasound measurement, Vital sign measurement, Spinal anesthesia
- Where
- Netherlands
- Volunteers
- 44 people
- Sponsor
- Catharina Ziekenhuis Eindhoven
Type 2 Diabetes
The Effect of Vitamin D Supplementation on Glucose Metabolism in Non-Diabetic African American Adults
Type 2 diabetes is more common among African Americans than Caucasians. African Americans are also at a higher risk for lower levels of vitamin D compared to other ethnic groups.
- Trial name
- AVIS (NCT01141192)
- Testing
- vitamin D3, cholecalciferol, Inactive comparator
- Where
- United States
- Volunteers
- 48 people
- Sponsor
- Augusta University
Cerebral Lesion
Internal Carotid Artery Blood Flow in Infants With Prone Position
Little is known about how implementation of prone position contributes to general anesthesia-induced decrease in cerebral blood flow in infants.
- Trial name
- NCT05391282
- Testing
- ultrasound assessment
- Where
- South Korea
- Volunteers
- 20 people
- Sponsor
- Seoul National University Hospital
Cerebral Arterial Diseases
Hemodynamic and Functional Characteristics of the Cerebral Circulation in Obesity
This prospective study is intended to explore differences in the cerebral hemodynamics and vascular functional characteristics between obese and normo-constituted patients; as well as the changes in the hemodynamic and functional…
- Trial name
- HemOB (NCT06067113)
- Testing
- Supraaortic and transcranial duplex
- Where
- Spain
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz
Anterior Cerebral Artery Syndrome, Anterior Cerebral Artery Stroke
Transcranial Doppler Evaluation After Endovascular Thrombectomy for Acute Ischemic Stroke (PRECISE-TCD)
Endovascular thrombectomy (EVT) improves outcomes in acute ischemic stroke caused by large vessel occlusion. Despite successful recanalization, early neurological deterioration (END) remains frequent and is associated with poor…
- Conditions
- Anterior Cerebral Artery Syndrome, Anterior Cerebral Artery Stroke, Acute Ischemic Stroke, Cardioembolic Stroke
- Trial name
- NCT07013396
- Testing
- Transcranial Doppler (TCD) examination
- Where
- United States
- Volunteers
- 100 people
- Sponsor
- Virginia Commonwealth University
Pregnancy, Immersion
Water Immersion and Changes in the Fetoplacental Circulation
Pregnant women with pre-eclampsia and growth restricted fetuses often have a reduced function of the placenta. This is accompanied by an increased perinatal mortality and morbidity.
- Trial name
- NCT01799343
- Testing
- Immersion into water
- Where
- Denmark
- Volunteers
- 25 people, healthy volunteers welcome
- Sponsor
- Hvidovre University Hospital
Aortic Diseases, Cardiac Surgical Procedures
Selective Antegrade Cerebral Perfusion and Perioperative Optic Nerve Sheath Diameter in Ascending Aortic Surgery
In ascending aortic surgery the distal anastomosis may be constructed with the aortic cross-clamp maintained, or, where the extent of the aortic pathology and the geometry of the graft require it, after release of the cross-clamp…
- Conditions
- Aortic Diseases, Cardiac Surgical Procedures, Aortic Aneurysm, Thoracic, Delirium - Postoperative
- Trial name
- SACP-ONSD (NCT07800806)
- Testing
- Optic nerve sheath and optic nerve diameter ultrasonography, Transcranial Doppler ultrasonography
- Where
- Turkey (Türkiye)
- Volunteers
- 134 people
- Sponsor
- Koşuyolu Kartal Heart Training and Research Hospital
Healthly Volunteers
Effects of Rutin on Oxidative Stress, Inflammatory Markers, and Blood Flow Velocity During Cycling 40km Time Trial Performance
Background: Rutin has several health benefits like improving total antioxidant capacity(TAC), inducing more nitric oxide(NO) produced from endothelium, and anti-inflammatory.
- Trial name
- NCT07518355
- Testing
- Rutin (Rutin trial)
- Where
- Taiwan
- Volunteers
- 12 people, healthy volunteers welcome
- Sponsor
- China Medical University Hospital
Age Problem
Relationship Between Respiratory Muscle Strenght, Peripheral Muscle Blood Flow and Gait Speed in the Elderly
The pourpose of this study is to verify if have relationship between respiratory muscle strenght, peripheral muscle blood flow and gait speed in the elderly.
- Trial name
- NCT04559659
- Testing
- Respiratory muscle strength
- Where
- Brazil
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Hospital Israelita Albert Einstein
Cardio-pulmonary Bypass, AORTIC VALVE DISEASES
Clinical Validation of a Novel Handsfree Doppler Ultrasound Device, RescueDoppler, in Adult Cardiac Surgery Patients
The goal of this study is to evaluate a new device called RescueDoppler (RD), which measures continuous blood flow in the common carotid artery. The device is handsfree and operator- independent.
- Conditions
- Cardio-pulmonary Bypass, AORTIC VALVE DISEASES, Coronary Arterial Disease (CAD), Aortic Aneurysm of the Proximal Arch
- Trial name
- RD_CPB (NCT06637540)
- Testing
- RescueDoppler
- Where
- 3 sites in Norway
- Volunteers
- 42 people
- Sponsor
- St. Olavs Hospital
Choroidal Neovascularization
Bevacizumab Effect on Blood Velocity
Retinal blood flow velocity is affected by Bevacizump intravitreal injection. This effect is correlated to treatment success.
- Trial name
- NCT01298440
- Where
- Israel
- Volunteers
- 12 people
- Sponsor
- Optical Imaging, Ltd.
Magnetic Resonance Imaging
Evaluation of 4D Magnetic Resonance Flow Sequence at Hepatic Level
The objective of the project is to establish the 3D velocity mapping of the hepatic vasculature and its consistency
- Trial name
- HEPAFLUX (NCT02821078)
- Testing
- 4D flow imaging sequence
- Where
- France
- Volunteers
- 44 people
- Sponsor
- Centre Hospitalier Universitaire, Amiens
Concussion
Vascular Assessment of Regulation Index Arrays Registry
The objective of this patient registry is to collect and analyze physiological data associated with baseline and brain injury identified in standard clinical practice (Normal Values, Recovery Curves, Correlation between Symptoms…
- Trial name
- VARIA (NCT02435082)
- Where
- United States
- Volunteers
- 13 people, healthy volunteers welcome
- Sponsor
- NeuroChaos Solutions, Inc.
Cystic Fibrosis
Blood Flow and Vascular Function in Cystic Fibrosis
Cystic fibrosis (CF) has many health consequences. A reduction in the ability to perform exercise in patients with CF is related to greater death rates, steeper decline in lung function, and more frequent lung infections.
- Trial name
- CF-FLOW (NCT02057458)
- Testing
- Sildenafil (Acute-1 hour), Sildenafil (Subchronic-4 weeks)
- Where
- United States
- Volunteers
- 19 people, healthy volunteers welcome
- Sponsor
- Augusta University
Lymphedema, Breast Cancer
The Effect of Resistive Exercise on Forearm Blood Flow and Tissue Oxygenation Among Breast Cancer Survivors With or at Risk for Breast Cancer-related Lymphoedema (BCRL)
The purpose of the study is to evaluate the effect of resistive exercise on forearm blood flow and tissue oxygenation among breast cancer survivors with or at risk for breast cancer-related lymphoedema (BCRL).
- Trial name
- NCT02527889
- Testing
- Exercise training
- Where
- Hong Kong
- Volunteers
- 40 people
- Sponsor
- The Hong Kong Polytechnic University