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Six-Month Outcomes from the Prospective, Multi-Center, Non-Randomized Clinical Study of the COVERA™ Arterio VeNous (AV) Stent Graft in the Treatment of Stenosis in the VEnous OutfloW of AV Fistula Access Circuits (AVeNEW PAS).
Cardiovasc Intervent Radiol
January 2025
Scientific Affairs, Becton Dickinson and Company, Tulsa, USA.
Purpose: The AVeNEW Post-Approval Study (AVeNEW PAS) follows upon results from the AVeNEW IDE clinical trial and was designed to provide additional clinical evidence of safety and effectiveness using the Covera™ Vascular Covered Stent to treat arteriovenous fistula (AVF) stenoses in a real-world hemodialysis patient population.
Materials And Methods: One hundred AVF patients were prospectively enrolled at 11 clinical trial sites in the USA and treated with the covered stent after angioplasty of a clinically significant target stenosis. The primary safety outcome was freedom from any adverse event that suggests the involvement of the AV access circuit evaluated at 30 days.
The Role of Duplex Ultrasound and Flow/Pressure Ratio in Predicting Invasive Treatment for High Venous Pressure in Patients Undergoing Hemodialysis.
Medicina (Kaunas)
December 2024
Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan.
: Vascular access complications, particularly high venous pressure, pose significant challenges for hemodialysis patients undergoing hemodialysis. Limited research has focused on identifying predictive factors for invasive treatment. This study aimed to identify patients who might benefit from frequent monitoring and conservative management based on duplex ultrasound (DUS) evaluation.
View Article and Find Full Text PDFFluid-structure interaction in a follow-up study of arterio-venous fistula maturation.
Sci Rep
November 2024
School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
Article Synopsis
- - Arteriovenous fistula (AVF) is the ideal vascular access for patients undergoing hemodialysis, created by surgically connecting an artery and vein, but research indicates that many do not function beyond a year.
- - This study utilized fluid-structure interaction (FSI) modeling to analyze non-Newtonian blood flow in a specific type of AVF over a 15-week and 1.5-year period, assessing both hemodynamic changes and wall alterations through ultrasound.
- - Key findings included the presence of counter-rotating vortices affecting pressure, different patterns of blood flow characteristics over time, minimal low-wall shear stress in healthy AVFs, and shifts in areas of maximum wall deformation as time
Arterio-Venous Fistula Calcifications-Risk Factors and Clinical Relevance.
Biomedicines
October 2024
Department of Internal Medicine II-Nephrology University Clinic, "Victor Babeș" University of Medicine and Pharmacy, Eftimie Murgu Sq. No. 2, 300041 Timisoara, Romania.
(1) Background: Arterio-venous fistulas (AVFs) are considered the gold-standard vascular access (VA) in patients on maintenance hemodialysis (HD) therapy. AVF calcifications represent a less studied VA related complication, even though HD patients are at a higher risk for extraosseous calcifications. The aim of this study is to assess the prevalence and risk factors of AVF calcifications, as well as the 5-year impact on AVF functionality and on overall mortality.
View Article and Find Full Text PDFThe trans-radial approach for endovascular intervention of the problem arterio-venous fistula: A single-centre case series and systematic review.
J Vasc Access
November 2024
Department of Vascular Surgery, Westmead Hospital, Westmead, NSW, Australia.
Introduction: The arteriovenous fistula (AVF) is the gold standard access modality for haemodialysis, but due to patient and technical factors, it is prone to stenosis and thrombosis. The trans-radial approach offers multiple unique benefits, but its safety, efficiency and efficacy have not been rigorously studied in the context of the AVF. This study provides a case series of trans-radial AVF procedures, and a systematic review and meta-analysis of existing literature to solidify the role of the trans-radial approach in endovascular AVF surgery.
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