Vascular imaging for hemodialysis vascular access planning

Area of Science:

• Nephrology
• Vascular Surgery
• Radiology

Background:

• Central venous catheters (CVC) are used for hemodialysis (HD) but carry risks.
• Achieving a functioning arteriovenous fistula (AVF) or arteriovenous graft (AVG) is crucial for long-term HD access.
• The role of vascular imaging in facilitating AVF/AVG creation is not well-established.

Purpose of the Study:

• To evaluate the impact of vascular imaging on the successful creation and outcomes of AVF and AVG in patients initiating HD with CVC.
• To assess the association between preoperative vascular imaging and the achievement of working AVF/AVG.
• To determine the effect of vascular imaging on mortality in this patient population.

Main Methods:

• Retrospective cohort study of 33,918 patients initiating HD with CVC between 2010-2011.
• Patients were classified based on exposure to venography or Doppler vein mapping.
• Cox and logistic regression models were used to analyze outcomes, adjusting for clinical and demographic factors.

Main Results:

• Vascular imaging was performed in 39.1% of patients.
• Imaged patients were significantly more likely to achieve a working AVF/AVG (HR=1.45) and any AVF/AVG (HR=1.63).
• Imaged patients had a lower risk of death (HR=0.88) and similar surgical outcomes compared to non-imaged patients.

Conclusions:

• Vascular imaging is associated with improved rates of successful AVF/AVG creation in patients initiating HD with CVC.
• Preoperative vascular imaging may reduce mortality in this high-risk group.
• Further research should explore optimizing imaging protocols for AVF/AVG planning.