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End-stage vascular access failure: can we define and can we classify?

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A new classification system for end-stage vascular access failure in dialysis patients is proposed. This system helps identify the scope of the problem and allows for standardized study of solutions for complex cases.

Keywords:
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Area of Science:

  • Nephrology
  • Vascular Surgery
  • Dialysis Access Management

Background:

  • Increasing patient survival in renal replacement therapy leads to exhausted vascular access options.
  • Lack of standardized definitions hinders assessment of "desperate measures" vascular access.
  • A growing cohort of dialysis patients face limited vascular access routes.

Purpose of the Study:

  • To propose a novel classification system for end-stage vascular access failure.
  • To test the applicability of this classification in a dialysis population.
  • To standardize the identification and management of complex vascular access.

Main Methods:

  • Development of a simple, hierarchical classification based on anatomical stratification.
  • Application of the classification to a large dialysis population, including a complex access clinic cohort.
  • Evaluation of patients with exhausted standard vascular access and those on permanent central venous catheters (CVC).

Main Results:

  • A classification grading (I) standard upper arm, (II) femoral, and (III) other options exhaustion was proposed.
  • In a complex access clinic (n=145), 21 patients were Class I, 26 Class II, and 2 Class III.
  • A significant number of referred patients (96) did not fit the proposed classification, highlighting the need for refinement.

Conclusions:

  • The number of patients with exhausted definitive access options is increasing.
  • The proposed classification aids in identifying the problem's scope and facilitates standardized study of solutions.
  • This classification can inform treatment comparisons and potentially guide iliac vessel preservation for transplantation eligibility.