Development and validation of a risk score to prioritize patients for evaluation of access stenosis. Issue 3 (12th October 2021)

• Record Type: Journal Article
• Authors: Astor, Brad C.; Hirschman, Kim; Kennedy, John; Frinak, Stan; Besarab, Anatole
• Is Part Of: Seminars in dialysis. Volume 35:Issue 3(2022)
• Page Start: 236
• Page End: 244
• Publication Date: 2021-10-12
• Subjects: Hemodialysis -- Periodicals; Dialysis -- Periodicals; Renal Dialysis -- Periodicals; 617.461059
• DOI: 10.1111/sdi.13026
• Languages: English
• ISSNs: 0894-0959

Abstract

Abstract: Background: Access flow dysfunction, often associated with stenosis, is a common problem in hemodialysis access and may result in progression to thrombosis. Timely identification of accesses in need of evaluation is critical to preserving a functioning access. We hypothesized that a risk score using measurements obtained from the Vasc‐Alert surveillance device could be used to predict subsequent interventions. Methods: Measurement of five factors over the preceding 28 days from 1.46 million hemodialysis treatments (6163 patients) were used to develop a score associated with interventions over the subsequent 60 days. The score was validated in a separate dataset of 298, 620 treatments (2641 patients). Results: Interventions in arteriovenous fistulae (AVF; n = 4125) were much more common in those with the highest score (36.2%) than in those with the lowest score (11.0). The score also was strongly associated with interventions in patients with an arteriovenous graft (AVG; n = 2, 038; 43.2% vs. 21.1%). There was excellent agreement in the Validation datasets for AVF (OR = 2.67 comparing the highest to lowest score) and good agreement for AVG (OR = 1.92). Conclusions: This simple risk score based on surveillance data may be useful for prioritizing patients for physical examination and potentially early referral for intervention.