Sharp needle recanalization for salvaging hemodialysis accesses with chronically occluded peripheral outflow

Area of Science:

• Interventional Nephrology
• Vascular Access Procedures
• Dialysis Access Management

Background:

• Chronic venous outflow occlusion is a significant challenge in maintaining hemodialysis access functionality.
• Conventional recanalization techniques often fail in cases of severe venous occlusion.
• Arm swelling, bleeding, and thrombosis are common complications necessitating effective treatment.

Purpose of the Study:

• To evaluate the efficacy of sharp needle recanalization (SNR) for treating chronically occluded venous outflow in hemodialysis access.
• To determine the success rate and safety of SNR in restoring hemodialysis access function.
• To assess patency rates and complication incidence following SNR procedures.

Main Methods:

• Retrospective analysis of 44 hemodialysis patients (31 fistulas, 13 grafts) with chronic outflow occlusion unresponsive to conventional methods.
• SNR involved creating a new outflow pathway by advancing a needle and dilating the subcutaneous tract.
• Stents (uncovered or covered) were used as needed to maintain tract patency; procedures were performed between January 2006 and March 2010.

Main Results:

• Forty-five SNR procedures resulted in functional restoration and symptom relief in 40 patients (91%).
• No major complications were observed. At 12 months, primary access patency was 10%, primary tract patency was 51%, and secondary access patency was 92%.
• Intervention rates for percutaneous thrombectomy and tract interventions were 1.16 and 0.94 per access-year, respectively.

Conclusions:

• Sharp needle recanalization is a highly effective percutaneous treatment for hemodialysis accesses with chronic venous outflow occlusion.
• SNR offers a successful solution for complex cases where conventional methods have failed.
• The procedure demonstrates a favorable safety profile and contributes to maintaining long-term access patency.