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The case against stenting the cannulation zone of dialysis access
Ivana Boktor1, Abduljalil Alragheb2, Ahmed E Ali3
1George Walton Comprehensive High School, Marietta, GA, USA.
Insights
Stent grafts (SG) in dialysis access can fracture from needle injury, causing severe complications. Reserve SG use in the cannulation zone for patients with limited survival options.
Area of Science:
- Vascular Surgery
- Nephrology
- Medical Devices
Background:
- Stent grafts (SG) are used for dialysis vascular access complications like stenosis and rupture.
- The safety of SG placement within the cannulation zone remains debated due to infection and fracture risks.
Observation:
- A case report details a fractured stent graft within the cannulation zone of a dialysis access.
- The fracture was linked to cumulative needle injuries from dialysis treatments.
Findings:
- The fractured stent graft led to life-threatening skin ulcerations requiring surgical intervention.
- Retrospective studies suggest SG safety in cannulation zones, but lack long-term data.
Implications:
- This case highlights the risk of stent fracture from repeated needle trauma in the cannulation zone.
- Consider SG placement in the cannulation zone cautiously, primarily for patients with poor prognosis and limited alternatives.
Abstract:
The indications for stent grafts (SG) placement within the dialysis vascular access include recurrent stenosis at the venous anastomosis of arteriovenous grafts, vessel rupture, pseudoaneurysm exclusion, and intra-stent stenosis. Controversy exists regarding the use of SGs within the cannulation zone due to the theoretical risks of increased infection and stent fracture. While prospective studies are lacking, several retrospective studies demonstrated the safety of SG use within the cannulation area. However, the short-term nature of these retrospective studies makes it challenging to draw any reasonable conclusions about SG's long-term safety profile. The presented case here showed that the accumulative exposure to needle injury during dialysis therapy was associated with fracturing the stent leading to life-threatening skin ulcerations that required immediate surgical intervention. Additionally, this case suggests that deploying SG within the cannulation segment should be reserved for those with poor survival and have exhausted other access options.
