Clinical trials: Doppler
Echocardiography, Doppler
Technical Development of Strain Rate Echocardiography
This study will examine heart function using two imaging techniques - echocardiography (ultrasound) and magnetic resonance imaging (MRI) - to evaluate newly developed software for echocardiograph machines.
- Trial name
- NCT00075920
- Where
- United States
- Volunteers
- 125 people, healthy volunteers welcome
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
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
Pulmonary Pathologies, Cardio-pulmonary Diseases
The Use of a Ultra-sound of the Lung to Diagnose Lung Diseases
The study is a prospective open evaluating study of Ultrasound/Doppler application to the chest cavity intended to detect and characterize pathologies of the pulmonary and cardio-vascular system.
- Trial name
- NCT01225367
- Testing
- ultrasound doppler monitoring
- Where
- Israel
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Echosense Ltd.
Lung Disease, Chronic Obstructive, Lung Disease, Interstitial
Detection and Characterization of Pulmonary Disease by Transthoracic Doppler (TTD)
The study seeks to characterize data obtained from patients with a variety of lung diseases using ultrasound Doppler signals obtained from lung tissue.
- Trial name
- NCT01618721
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Echosense Ltd.
Type 2 Diabetes, Healthy Aging
Role of Autophagy in Type 2 Diabetes Microvascular Dysfunction
The goal of this clinical trial is to examine the role of autophagy on microvascular function in adults with Type 2 Diabetes. The main question it aims to answer are: Does presence of Type 2 Diabetes reduce autophagy and impair…
- Trial name
- NCT05593549
- Testing
- Trehalose
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Medical College of Wisconsin
Renal Stone
Changes Post Percutaneous Nephrolithotomy
Using color doppler U/S, Abdominal U/S and radioisotope to evaluate changes of renal morphology, function and doppler parameters post Percutaneous nephrolithotomy
- Trial name
- KUB (NCT06185387)
- Where
- Egypt
- Volunteers
- 28 people, healthy volunteers welcome
- Sponsor
- Assiut University
Diabetes Mellitus, Type 1, Diabetic Retinopathy
Choroidal Blood Flow Changes During Dark/Light Transitions in Patients With Insulin-dependent Diabetes Mellitus (IDDM)
There is evidence from a variety of animal studies that choroidal blood flow is under neural control. Recent results in humans indicate that a light/dark transition is associated with a short lasting reduction in choroidal blood…
- Trial name
- NCT00718614
- Testing
- Light will be switched from 0.5µW/cm2/sr to 115µW/cm2/sr.
- Where
- Austria
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Lipodystrophy
Carotid Doppler Peak Velocity Variation in Liposuction Fluid Management
This study aims to compare the hemodynamic parameters, postoperative plethysmography variability index, the total amount of postoperative intravenous fluid administration needed, and the urine output of two methods of fluid…
- Trial name
- NCT05930106
- Testing
- Intraoperative fluid ratio, Carotid Artery Doppler Peak Velocity Variation
- Where
- Mexico
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- TJ Plast Advanced Center for Plastic Surgery
Preeclampsia, IUGR
Prediction of Preeclampsia & Other Obstetric Complications by Serum Homocysteine & Doppler
Second trimester homocysteine \& uterine artery doppler will be assessed\& the cases will be followed up till delivery for development of preeclampsia, IUGR(intra-uterine growth retardation) \& other obstetric complications.
- Trial name
- NCT02541110
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Kasr El Aini Hospital
Maternal-Fetal Exchange
Maternal Uterine Artery Doppler Study
The purpose of this study is to detect if adding resistance to maternal blood flow from the arm will help increase the blood flow through the uterine arteries to the placenta and the baby.
- Trial name
- NCT01698957
- Testing
- Any patient eligible for an Ultrasound greater than or equal to 18 weeks gestation without a fetal or uterine anomaly.
- Where
- 2 sites in United States
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- Obstetrix Medical Group
Healthy Amateur Divers
Effects of Voluntary Neck Extension on Cerebral Blood Flow, in Breath-hold Divers Ending an Apnoea of Two Minutes or More.
The aim of this study is to demonstrate the effect of the voluntary neck extension in the occurrence of an increase in the pulsatility index of the right internal carotid artery in the amateur diver, realizing an apnea of two…
- Trial name
- APNECK (NCT03210857)
- Testing
- apnea performing
- Where
- France
- Volunteers
- 15 people, healthy volunteers welcome
- Sponsor
- Nantes University Hospital
Glaucoma
Ocular Hemodynamic Effects of Nitrovasodilators in Healthy Subjects
Glaucoma, one of the most common causes of blindness, is associated with increased intraocular pressure (IOP) and optic nerve head ischemia. Nitrovasodilators are discussed in the treatment of glaucoma.
- Trial name
- NCT00810381
- Testing
- Nitroglycerin, Isosorbide-Dinitrate, Sodium-nitroprusside
- Where
- Austria
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Oligohydramnios, Amniotic Fluid; Disorder
Effect of Intermittent Pneumatic Compression Device of Lower Limbs in Oligohydramnios
the study will examine the effect of application of intermittent pneumatic pressure device on lower limbs on the amniotic fluid amount and fetal doppler indices in women with oligohydramnios
- Trial name
- NCT05474326
- Testing
- intermittent pneumatic pressure device (Kendall SCD™ 700 Smart Compression™ System)
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Western Galilee Hospital-Nahariya
Type 1 Diabetes Mellitus
Doppler Ultrasound Investigation of Microcirculations
The investigators aim to show that quantitative analysis of doppler flow velocity waveforms i.e. ultrasound which is a non-invasive and very safe means of assessing blood flow; recorded in the proximity of terminal microvascular…
- Trial name
- NCT01045005
- Testing
- Administration ofOxygen and carbon dioxide, Administration of Oxygen and carbon dioxide
- Where
- United Kingdom
- Volunteers
- healthy volunteers welcome
- Sponsor
- Queen's University, Belfast
Venous Thrombosis
Study of Arixtra (Fondaparinux Sodium) to Prevent Blood Clots in Women Undergoing Abdominopelvic Surgery for Likely Gynecologic Malignancy
This is a randomized trial to compare intermittent compression devices with or without post-operative Arixtra (fondaparinux sodium) in women undergoing major abdominal surgery for known or presumed gynecologic malignancies.
- Trial name
- NCT00539942
- Testing
- Arixtra (fondaparinux sodium), Intermittent compression devices (ICD)
- Where
- United States
- Volunteers
- 7 people, healthy volunteers welcome
- Sponsor
- University of Alabama at Birmingham
Neonatal Resuscitation
Doppler Ultrasound Compared With Stethoscope to Assess Heart Rate (HR)
This is a prospective randomized controlled trial comparing heart rate measurement by Doppler ultrasound or auscultation with a stethoscope in newborn infants who require stabilization or resuscitation immediately after birth.
- Trial name
- NCT04242654
- Testing
- Handheld fetal doppler ultrasound
- Where
- United States
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- Columbia University
Clitoris Vascularity
3D Ultrasound and Color Doppler Studies of the Clitoris in Pregnant Women
Patients will be divided into two groups: Group A: 30 pregnant women Group B: 30 non pregnant women as control group. All patients will be subjected to the following: 1.
- Trial name
- NCT06084728
- Testing
- Color Doppler ultrasonography
- Where
- Egypt
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Cairo University
Menopause
Vascular Effect of Tibolone in the Brachial Artery
The interruption of the secretion of sex steroids occurring during menopause, causes a change in vascular pattern at various levels. As a result, several agencies have side effects that interfere with women's health.
- Trial name
- TDILA (NCT01543399)
- Testing
- Tibolone
- Where
- Brazil
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Selmo Geber
Tetralogy of Fallot
Analysis of RV-Dysfunction in Fallot Patients
In the presented study TDI will be used as a modern technique to characterize RV-function in Fallot patients at rest and during different exercise conditions.
- Trial name
- Fallot (NCT03835494)
- Testing
- Transthoracic echocardiography at rest, during PLR, HG and CPX (including blood gas analysis in both groups). Additionally Fallot patients will undergo routine blood testings.
- Where
- Germany
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Klinik für Kardiologie, Pneumologie und Angiologie
Hay Fever
Evaluation of High Speed Laser Doppler Imaging Technology
Skin prick tests (SPT) are commonly used in daily allergological practice to assess skin reactivity to allergens. Multiple factors can contribute to non-optimal results of conventional wheal and flare measurement (CWFM) of SPT…
- Trial name
- HSL-DI (NCT02619331)
- Testing
- Allergy test reading
- Where
- Switzerland
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Centre Hospitalier Universitaire Vaudois