Active clinical trials for "Arteriovenous Fistula"

Arteriovenous malformations (AVM) are abnormally formed blood vessels that can be located throughout the brain and spinal cord. Patients with abnormalities of the blood vessels located in and around the spinal cord can develop many neurological problems. Some problems include, weakness, pain, difficulty walking, paralysis, and even death. The treatment for these AVMs depends on their location, the type of malformation, the area of the spine involved, and the condition of the patient at the time of treatment. The treatment is aimed at stopping the neurologic problems from worsening and possibly correcting the existing problems. There are two commonly used treatments for AVMs, surgery and embolization (blocking off of blood flow to the AVM). However, researchers have limited experience treating these conditions because they are rare. In addition, it has been difficult to classify different kinds of AVMs and to develop new treatments for them. This study is designed to increase researchers understanding of AVMs by admitting and following patients diagnosed with the condition. By increasing the amount of patients studied diagnosed with spinal blood vessel abnormalities, researchers can begin to develop new management plans for patients with AVMs.

Newly formed dialysis fistulae can often fail, and failure is usually due to narrowing of the blood vessels. Methods of detecting narrowing are available and, more importantly, can detect narrowings before a fistula fails. It is not known whether treating these narrowings will actually improve fistula survival or if the majority can be left alone. we wish to see if we can detect such narrowings with ultrasound scanning and if early detection and treatment improves patient outcomes.

Isometric exercise has been shown to increase the diameter and the blood flow rate of forearm veins.At present, more studies focus on the perioperative period to promote the maturation of arteriovenous fistula(AVF), while there are few reports on functional maintenance measures for the patients with maintenance hemodialysis.This study aims to explore the effect of dumbbell exercise on AVF，and evaluate whether patients can carry a 6-pound item with the fistula limb in a reasonable way.

Pulmonary arteriovenous malformations (PAVMs) are a rare vascular condition affecting the lungs. PAVMs lead to low blood oxygen levels, yet are very well tolerated by patients. This study will examine the exercise capacity of PAVM patients using formal cardiopulmonary exercise tests performed on a stationary bicycle, and whether this is affected by the presence of concurrent airflow obstruction, such as due to asthma.

Arteriovenous fistula (AVF) is considered the gold standard for safe and effective vascular access during hemodialytic treatment. It is known that systemic aerobic exercise is capable of promoting peripheral vasodilation, however, its effects on AVF are unknown. For this reason, we will evaluate the effects of aerobic exercise on a stationary bicycle over the AVF caliber.

This study will investigate the effect of pre-operative exercise on hemodynamics in the fistula artery and vein, Pre and Post Arteriovenous Fistula Formation as well as the suitability of Cannulation of Arteriovenous Fistula at 12 weeks Post Surgery. This is a randomised control study with 20 patients each in the Control arm (Group A) or the Exercise arm (Group B). The subjects will be randomised into 1:1 into one of the two groups. The patients will have an ultrasound doppler vein mapping done prior surgery and the necessary follow up visits.

Objective: To analyze the effect of neuromuscular electrostimulation in the maturation of radiocephalic arteriovenous fistula (RC-AVF) patients with chronic kidney disease (CKD) stage 5-5D Design: Clinical Trial with medical devices, 18-month, single-center, within the hospital setting. Disease or disorder study: vascular Access maturation. Population: Patients with CKD stage 5-5D at the research center. Project duration: 78 weeks Methodology: Patients with CKD stages 5-5D that has undergone a native AV in service stations to give their informed consent and meeting the inclusion criteria will be included. At baseline two study groups were established: Group 1: neuromuscular electrostimulation Group 2: isometric exercises

Pulmonary arteriovenous malformations (PAVMs) are thin-walled abnormal vessels which provide direct capillary-free communications between the pulmonary and systemic circulations. Patients with PAVMs have usually have low blood oxygen levels and are at risk of other complications including strokes, brain abscesses, pregnancy-related complications and haemorrhage. We hypothesise that the complications of PAVM patients arise from their PAVMs and not the more recognised intracardiac forms of shunting. We propose to perform echocardiograms to enable assessment of the presence of other causes of capillary-free communications between the pulmonary and systemic circulations.

The objective of this registry is to collect observational data under local standard of care and evaluate safety and performance of the Serranator® Alto in treatment of peripheral artery disease (PAD), or dysfunctional native or synthetic arteriovenous dialysis fistulae in a real-world scenario.

Arteriovenous fisutla (AVF) is the vascular access of choice for hemodialysis but has a high early failure (eAVFF) rate. eAVFF can be defined as thrombosis/stenosis and Doppler ultrasound (DUS)-based failure-to-mature parameters such as postoperative blood flow (PostQa) < 500 ml/min, AVF-vein diameter (PostVD) < 5 mm, and AVF-vein depth (PostVDepth) ≥ 6 mm. We explored whether common risk factors for eAVFF could predict these eAVFF parameters and venous distensibility: the latter is largely overlooked as a potential eAVFF parameter.