Clinical trials: Blood Circulation Disorder
Nitric Oxide, Endothelium-Derived Relaxing Factor
Effects of Nitrite on Blood Vessel Dilation in Normal Volunteers
Nitric oxide gas is important in regulating blood vessel dilation, and consequently, blood flow. This gas is continuously produced by endothelial cells, which line the blood vessels.
- Conditions
- Nitric Oxide, Endothelium-Derived Relaxing Factor, Healthy
- Trial name
- NCT00048477
- Testing
- L-NMMA and Sodium Nitrite
- Where
- United States
- Volunteers
- 42 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Traumatic Brain Injury
Ketogenic Diet & Functional Recovery in Moderate to Severe Traumatic Brain Injury
Traumatic Brain Injury (TBI) represents a significant public health risk in the United States leaving many survivors with significant long term cognitive deficits and at risk for neurodegenerative diseases.
- Trial name
- NCT04530032
- Testing
- ketogenic/modified Atkins diet, Standard diet
- Where
- United States
- Volunteers
- 21 people
- Sponsor
- Loma Linda University
Hypoxic-Ischemic Encephalopathy
The Effects of Minimal Enteral Nutrition on Mesenteric Blood Flow and Oxygenation in Neonates With HIE
The goal of this clinical trial is to evaluate the effects of minimal enteral nutrition (MEN) on mesenteric blood flow and oxygenation with Doppler USG and Near Infrared Spectroscopy (NIRS) during therapeutic hypo¬thermia (TH) in…
- Trial name
- NCT06344286
- Testing
- Minimal enteral nutrition, Distilled water
- Where
- Turkey (Türkiye)
- Volunteers
- 60 people
- Sponsor
- Istanbul Training and Research Hospital
Atherosclerosis, Healthy
Racial Differences in Control of Blood Vessel Tone and Blood Flow
Black Americans tend to die more often from and have more diseases associated with heart disease than White Americans. The exact cause of this is unknown, but it is likely a combination of genetics, behavior, risk factors…
- Conditions
- Atherosclerosis, Healthy, Hypertension
- Trial name
- NCT00001747
- Where
- United States
- Volunteers
- 108 people
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Pulmonary Atresia With Intact Ventricular Septum, Congenital Heart Disease
Prognostic Model of Postnatal Circulation in Pulmonary Atresia-critical Stenosis With Intact Ventricular Septum
Pulmonary atresia (PA)/critical stenosis (CS) with intact ventricular septum (PA/CS-IVS) is a rare congenital heart disease (CHD), that presents heterogeneously.
- Conditions
- Pulmonary Atresia With Intact Ventricular Septum, Congenital Heart Disease, Fetal Cardiac Disorder
- Trial name
- NCT07095829
- Testing
- No intervention
- Where
- 2 sites in Spain, Sweden
- Volunteers
- 150 people
- Sponsor
- Hospital Universitario 12 de Octubre
Healthy
Analysis of Heart Muscle Function Following Exercise in Patients With Heart Disease
This study is designed to examine the blood flow, the nutrition, and the beating function of the heart under different conditions. Patients with narrowed coronary arteries my have restricted blood flow to the heart.
- Trial name
- NCT00001528
- Where
- United States
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Coronary Artery Disease
Stem Cell Mobilization to Treat Chest Pain and Shortness of Breath in Patients With Coronary Artery Disease
This two-part study will determine whether stem cells (primitive cells produced by the bone marrow that can develop into blood cells or other types of cells) can be pushed out into the bloodstream, relocate in the heart, and grow…
- Trial name
- NCT00043628
- Testing
- Stem Cell Mobilization
- Where
- United States
- Volunteers
- 35 people
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Sickle Cell Disease
Voxelotor Brain Oxygenation and Neurocognitive Study
This is an open label, single arm multicenter trial to evaluate the effect of voxelotor treatment on cerebral blood flow (CBF) and neurocognitive function in adolescent and young adult participants (12-30 years of age) with…
- Trial name
- NCT05228821
- Testing
- Voxelotor Oral Tablet
- Where
- 2 sites in United States
- Sponsor
- Pfizer
Critical Illness, Pediatric Critical Illness
Brain Blood Flow and Cerebral Autoregulation Monitoring in Critically Ill Children
This study uses a non-invasive (external) ultrasound test called Transcranial Doppler (TCD) to measure how blood flows through the major arteries of the brain of children receiving care in the Pediatric Intensive Care Unit…
- Conditions
- Critical Illness, Pediatric Critical Illness, Respiratory Failure, Traumatic Brain Injury
- Trial name
- NCT07613918
- Testing
- Transcranial Doppler
- Where
- United States
- Volunteers
- 125 people
- Sponsor
- University of Wisconsin, Madison
Drop Foot
The Investigators Are Comparing Lidocaine and Papaverine Nerve Blocks to Determine Which Improves Blood Flow Better, Making the "Phoenix Sign" Clearer on Imaging. This Helps Accurately Diagnose Nerve Compression, Improving Patient Care
This pilot study aims to investigate the effects of nerve blocks in patients with diabetic peripheral neuropathy through a double-blinded, randomized trial involving 4 patients.
- Trial name
- NCT06919289
- Testing
- Infiltration of papaverine, Lidocaine infiltration
- Where
- United States
- Volunteers
- 4 people, healthy volunteers welcome
- Sponsor
- US Neuropathy Centers
Oral Cancer, Head and Neck Cancer
Assessment of the Effects of Pressors on Graft Blood Flow After Free Tissue Transfer Surgery
Following surgery to remove tumours of the head and neck, patients undergo reconstruction with free flaps - tissue that is taken from elsewhere in the body and given a new blood supply by attaching it to vessels in the neck.
- Conditions
- Oral Cancer, Head and Neck Cancer, Free Flap, Hypotension
- Trial name
- Free4Flow (NCT01418118)
- Testing
- Epinephrine, Norepinephrine, Dobutamine
- Where
- United Kingdom
- Volunteers
- 25 people
- Sponsor
- Oxford University Hospitals NHS Trust
Choroid
Three-dimensional Choroidal Vascularity Index in Common Fundus Diseases
Explore the changes of choroidal blood perfusion in common fundus diseases by three-dimensional choroidal vascularity index, an optical coherence tomography (OCT) parameter.
- Trial name
- NCT04790084
- Testing
- no intervention
- Where
- China
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Renmin Hospital of Wuhan University
Cognition Disorders
PET Scan to Map the Areas of the Brain Involved in Planning
Positron Emission Tomography (PET) is a technique used to investigate the functional activity of the brain. The PET technique allows doctors to study the normal processes of the brain (central nervous system) of normal…
- Trial name
- NCT00001363
- Where
- United States
- Volunteers
- 230 people
- Sponsor
- National Institute of Neurological Disorders and Stroke (NINDS)
Anastomotic Leak
Anastomotic Leakage After Anterior Resection for Rectal Cancer - Predictive Biomarkers and Rectal Blood Flow
The purpose of this study is to determine whether reduced rectal blood flow is associated with the extent of surgery when performing an operation to remove rectal cancer.
- Trial name
- NCT02401100
- Where
- Sweden
- Volunteers
- 36 people
- Sponsor
- Umeå University
Acute Kidney Injury, Children
Renal Oxygen Saturation and Its Association With Acute Renal Injury
Peri-operative renal dysfunction is a major mortality and morbidity cause following cardiac and major vascular surgery. Although several intra-operative strategies are proposed for better outcomes, no effective and fast resulting…
- Conditions
- Acute Kidney Injury, Children, Cardiac Surgery
- Trial name
- NCT03608956
- Where
- Turkey (Türkiye)
- Sponsor
- Marmara University
Cerebral Palsy
Strength Training Combined With Blood Flow Restriction and Cerebral Palsy
load resistance exercises are performed while partially restricting venous blood flow to the exercising limb using a pneumatic cuff.
- Trial name
- NCT07748052
- Testing
- strength training combined with blood flow restriction and designed physical therapy program, a specially designed physical therapy program
- Volunteers
- 26 people
- Sponsor
- Cairo University
Williams Syndrome, Supravalvular Aortic Stenosis
Impact of Elastin Mediated Vascular Stiffness on End Organs
Background: People with Williams Syndrome (WS) and supravalvular aortic stenosis (SVAS) have less elasticity in their blood vessels. This is called blood vessel stiffness.
- Conditions
- Williams Syndrome, Supravalvular Aortic Stenosis, Cardiovascular Disease
- Trial name
- NCT02840448
- Where
- 2 sites in United States
- Volunteers
- 159 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
Orthodontic Treatment
Curve of Spee: Speed of Leveling Using Different Orthodontic Archwires
The objectives if this study was to evaluate the efficacy of 3 different rectangular archwires in the correction of the curve of Spee (COS), to record the time needed to level excessive COS in the mandibular arch using the 3…
- Trial name
- NCT04549948
- Testing
- 0.017X0.025 Stainless steel, 0.019X0.025 Stainless steel, 0.021X0.025 B-Titanium archwire
- Where
- Jordan
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- Jordan University of Science and Technology
Subacromial Impingement Syndrome
Effect of Blood Flow Restriction Training Versus Pilates on Shoulder Impingement Syndrome
Subacromial impingement syndrome (SAIS) is the most common cause of shoulder pain, accounting for a large proportion of musculoskeletal complaints.
- Trial name
- NCT07608809
- Testing
- Low load resistance training with BFR, Pilates exercises, Cool's shoulder exercises
- Where
- Egypt
- Volunteers
- 48 people
- Sponsor
- Cairo University
Intestinal Blood Flow
Packed Red Blood Cell Transfusion and Intestinal Blood Flow in Preterm Neonates
The purpose of the study is to determine whether packed red blood cell (PRBC) transfusion affects intestinal blood flow of premature infants during feedings and if so, whether return of normal intestinal blood flow pattern occurs…
- Trial name
- NCT01628133
- Testing
- ultrasound
- Where
- United States
- Volunteers
- 25 people
- Sponsor
- St. Louis University