Clinical trials: Doppler
Congenital Heart Defects
Use of Color Doppler in Routine Examination of Fetal Heart in Second Trimester
To evaluate the percentage of severe heart defect diagnosed with the use of color Doppler at a routine fetal scan in the second trimester of pregnancy
- Trial name
- NCT01201486
- Where
- Norway
- Volunteers
- 6,781 people
- Sponsor
- Helse Stavanger HF
Right-to-left Shunt, Migraine
Registry of Right-to-left Shunt Detection by Contrast-enhanced Transcranial Doppler in Chinese Population
The purpose of the study is to evaluate the prevalence and extent of right-to-left shunt (RLS) in Chinese migraineurs, and the morbidity of silent cerebral infarction in migraineurs.
- Conditions
- Right-to-left Shunt, Migraine, Cerebral Infarction
- Trial name
- NCT02425696
- Where
- China
- Volunteers
- 1,100 people, healthy volunteers welcome
- Sponsor
- Yingqi Xing
Fluid Overload, Postoperative Complications
Crystalloids Versus Colloids During Surgery
The purpose of the study is to test whether colloid-based goal-directed intraoperative fluid management leads to less perioperative morbidity compared to crystalloid-based goal-directed intraoperative fluid management.
- Trial name
- CC (NCT00517127)
- Testing
- Lactated Ringer's Solution, Hydroxyethylstarch 6% 130/0.4
- Where
- Austria
- Volunteers
- 1,109 people
- Sponsor
- Medical University of Vienna
Coronary Artery Disease
2D and Tissue Doppler Imaging Echocardiography Analysis of Left Ventricular Regional Wall Motion and Prognosis
Development of myocardial ischemia, and/or myocarditis would induce different changes in myocardial contraction behavior pattern,which maybe very subtle, and may not be detected by the 2D and m-mode echocardiography examinations.
- Trial name
- TDI (NCT01092429)
- Where
- Taiwan
- Volunteers
- 500 people, healthy volunteers welcome
- Sponsor
- Chang Gung Memorial Hospital
Papillary Thyroid Carcinoma
Multimodal Deep Learning for Lymph Node Metastasis in Thyroid Cancer
Papillary thyroid carcinoma (PTC) is the most common endocrine malignancy in clinical practice, accounting for approximately 85% of all thyroid malignancies.
- Trial name
- NCT07299318
- Testing
- not intervention
- Where
- China
- Volunteers
- 3,200 people
- Sponsor
- West China Hospital
Diabetes Mellitus
Microvascular Response in Diabetes Mellitus
Vascular and neurological mechanisms are both likely to be involved in foot ulcer. We recently reported on the hand an original transient pressure-induced vasodilation (PIV) during a 5 mmHg/min increase of pressure strain using…
- Trial name
- NCT00160927
- Testing
- local heating, iontophoresis, actylcholine
- Where
- France
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- University Hospital, Angers
Cardiopulmonary Arrest
Measurement of Cerebral Flow Using Transfontanellar Doppler in Infants Under Cardiopulmonary Bypass
Transfontanellar Doppler can measure the velocity at both the carotid artery and the anterior cerebral artery during cardiopulmonary bypass in congenital heart disease patients.
- Trial name
- NCT01996020
- Where
- South Korea
- Volunteers
- 43 people
- Sponsor
- Seoul National University Hospital
Ischemia
Efficacy of Ambrisentan in Limited Scleroderma Patients in Improving Blood Flow to Hands or Feet
The purpose of this study is to investigate the effectiveness of a drug called ambrisentan, approved by the FDA for use in pulmonary hypertension (a condition where there is increased pressure in the right side of the heart) in…
- Trial name
- ambrisentan (NCT01072669)
- Testing
- ambrisentan
- Where
- United States
- Volunteers
- 20 people
- Sponsor
- Soumya Chatterjee
Endothelial Function, Cognition
Cognitive and Cerebral Blood Flow Effects of Vitamin C
This investigation is interested in the effects of high dose vitamin C on endothelial function in healthy humans. A high fat meal will be utilized to induce endothelial dysfunction.
- Trial name
- NCT01055418
- Testing
- Vitamin C
- Where
- United Kingdom
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Northumbria University
Acute Kidney Injury
Doppler-based Renal Resistive Index in Assessing Renal Dysfunction Reversibility in ICU Patients
Acute kidney injury (AKI) is common in intensive care unit (ICU) patients and remains associated with a dismal prognosis. The diagnosis of AKI relies on functional criteria (oliguria and serum creatinine elevation), which carry…
- Trial name
- R2D2 (NCT02355314)
- Testing
- Doppler-based renal, blood sample and urine sample
- Where
- 5 sites in France
- Volunteers
- 367 people
- Sponsor
- Centre Hospitalier Universitaire de Saint Etienne
Chronic Obstructive Pulmonary Disease With Acute Exacerbation, Unspecified
Comparison of Two Oxygen Setting During Non-invasive Mechanical Ventilation of Chronic Obstructive Pulmonary Disease
Hypoxaemic patients with exacerbations of chronic obstructive pulmonary disease (COPD) are at some risk of carbon dioxide (CO2) retention during oxygen therapy.
- Trial name
- OXYSET (NCT02563314)
- Testing
- Non-invasive mechanical ventilation - Normoxia, Non-invasive mechanical ventilation - Controlled hypoxemia
- Where
- 4 sites in France
- Volunteers
- 1 people
- Sponsor
- Centre Hospitalier Universitaire de Saint Etienne
Coronary Artery Disease, Microcirculation Resistance
COronoary Microcirculation Analysis NETwork
COMA.NET (Coronary Microcirculation Analysis Network) is a prospective, randomized, open-label, parallel-group clinical trial designed to determine whether endotype-guided pharmacotherapy is superior to standard care in improving…
- Conditions
- Coronary Artery Disease, Microcirculation Resistance, Microcirculation; Biomarkers; Myocardial Ischemia, Microcirculatory Dysfunction
- Trial name
- COMA-NET (NCT07498231)
- Testing
- Coronary microvascular function assessment
- Where
- Poland
- Volunteers
- 180 people
- Sponsor
- Medical University of Bialystok
Carotid Artery Stenosis, Ischemic Stroke
Platelet Reactivity and MES During CEA
The purpose of this study is to analyze the association between aspirin efficacy and general platelet reactivity in relation to microembolic signals (MES) during carotid endarterectomy (CEA).
- Conditions
- Carotid Artery Stenosis, Ischemic Stroke, Myocardial Infarction, Aspirin Resistance
- Trial name
- NCT01547039
- Where
- Netherlands
- Volunteers
- 200 people
- Sponsor
- UMC Utrecht
Spinal Hypotension, Doppler
Doppler Indices to Predict Spinal Hypotension During Cesarean Section
Spinal anesthesia is safe and advisable anesthetic during cesarean section, despite that spinal induced hypotension is a common associated problem.
- Trial name
- NCT06825806
- Testing
- Femoral artery Doppler
- Where
- Egypt
- Volunteers
- 40 people
- Sponsor
- Cairo University
Skin Thickness, Skin Stiffness
Effects of Vibration Therapy on Plantar Skin Properties
The goal of this clinical trial is to learn if there are changes in plantar skin surface in the first metatarsal head (M1) after getting local vibration treatments.
- Conditions
- Skin Thickness, Skin Stiffness, Microcirculation
- Trial name
- NCT07863843
- Testing
- Local vibration
- Where
- Taiwan
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Asia University
Foot Ulcer, Diabetic
Dynamic Plantar Microvascular Skin Response to Compressive Loads in At-risk Diabetic and Healthy Control: a Pilot Study
The purpose of this pilot study is to compare the dynamic response of microcirculation in the skin on the bottom of the big toe after applying controlled plantar stress in 25 diabetic subjects with a history of foot ulcer and 25…
- Trial name
- ILH (NCT01580917)
- Where
- United States
- Volunteers
- 18 people
- Sponsor
- Temple University
Hypertrophic Scars
Using Skin Blood Flow to Measure the Effect of Different Doses of Negative Pressure Therapy
Introduction. Skin blood flow (SBF) is crucial for transporting nutrients during healing to treat scarring. Negative pressure therapy (NPT) is a promising option to enhance SBF.
- Trial name
- Negative press (NCT06690749)
- Testing
- Negative pressure therapy, NPT
- Where
- Taiwan
- Volunteers
- 36 people
- Sponsor
- Asia University
Preterm Labor, Cerebral Palsy
Calcium Channel Blockers Compared to Magnesium Sulfate in Fetal Cerebral Blood Flow
The aim of this study is to investigate the possible use of calcium channel as a neuroprotectant in cases with PTL. This will be done by comparing the effect they have on cerebral blood vessels with the already established MgSo4.
- Trial name
- NCT02591004
- Testing
- Magesium sulphate, Nifedipine, Doppler on fetal middle cerebral artery
- Where
- Egypt
- Volunteers
- 130 people, healthy volunteers welcome
- Sponsor
- Kasr El Aini Hospital
Trauma, Brain
Transcranial Doppler in Mild and Moderate Traumatic Brain Injury (TBI)
Utility of transcranial Doppler as an Early Predictor of Neurological deterioration in Mild and Moderate Traumatic Brain Injury
- Trial name
- NCT05151978
- Testing
- Transcranial Doppler
- Where
- Egypt
- Volunteers
- 105 people
- Sponsor
- Tanta University
Fetal Surveillance, Intrauterine Growth Restriction
Comparison of Follow-up Protocols in Terms of Fetal, Neonatal and Maternal Results in Intrauterine Growth Retardation
This study will be undertaken to determine whether the frequency of fetal surveillance can be safely reduced from bi-weekly to weekly in the case of fetusus with intrauterine growth restriction.
- Trial name
- NCT04141189
- Testing
- weekly, bi-weekly
- Where
- Turkey (Türkiye)
- Volunteers
- 206 people, healthy volunteers welcome
- Sponsor
- Bezmialem Vakif University