Early and late fistula failure.

Area of Science:

• Nephrology
• Vascular Surgery
• Interventional Radiology

Background:

• Arteriovenous fistulas (AVFs) are the preferred hemodialysis access but frequently experience early or late failure.
• Early AVF failure is primarily caused by venous stenosis or accessory veins, while late failure can result from thrombosis.
• Minimizing catheter use is crucial for hemodialysis patients, as highlighted by the National Kidney Foundation Dialysis Outcomes Quality Initiative.

Purpose of the Study:

• To evaluate the efficacy of percutaneous interventions and endovascular techniques in salvaging failing arteriovenous fistulas.
• To assess the success rates of declotting thrombosed fistulas using various endovascular methods.
• To emphasize the importance of AVF salvage strategies in maximizing access longevity and patient outcomes.

Main Methods:

• Percutaneous transluminal angioplasty for venous stenosis.
• Thromboaspiration techniques for managing thrombosed fistulas with varying thrombus burdens.
• Review of recent data on the outcomes of endovascular salvage procedures for AVFs.

Main Results:

• A significant majority of early AVF failures due to stenosis or accessory veins can be successfully treated with percutaneous interventions.
• Most thrombosed fistulas, regardless of thrombus volume, can be successfully declotted using endovascular techniques like angioplasty or thromboaspiration.
• Salvage interventions restore AVF functionality, enabling dialysis and reducing reliance on central venous catheters.

Conclusions:

• Endovascular interventions are highly effective in salvaging both early and late failing arteriovenous fistulas.
• Successful declotting and angioplasty of AVFs significantly improve access availability for hemodialysis.
• Maximizing AVF use through timely salvage strategies is essential for optimal patient care and outcomes in hemodialysis.