Journal of Medicine and Life Science

Institute for Medical Science (제주대학교 의과학연구소)
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Impact of monthly arteriovenous fistula flow surveillance on hemodialysis access thrombosis and loss

  • Ara Ko (Division of Nephrology, Department of Internal Medicine, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Miyeon Kim (Division of Nephrology, Department of Internal Medicine, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Hwa Young Lee (Division of Nephrology, Department of Internal Medicine, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Hyunwoo Kim (Division of Nephrology, Department of Internal Medicine, Jeju National University Hospital, Jeju National University College of Medicine)
  • Received : 2023.05.18
  • Accepted : 2023.07.24
  • Published : 2023.09.30
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Abstract

Arteriovenous fistula flow dysfunction is the leading cause of vascular access thrombosis and loss in patients undergoing hemodialysis. However, data regarding the influence of access flow rate measurements on the long-term outcomes of access are limited. This study aims to identify accesses at a high risk of thrombosis and loss among patients undergoing hemodialysis by measuring the access flow rate and exploring an optimal threshold value for predicting future access thrombosis. We enrolled 220 patients with arteriovenous fistula undergoing hemodialysis. The primary outcome was the occurrence of access thrombosis. Access flow rates were measured monthly using the ultrasound dilution method and were averaged using all measurements from patients with patent access. In patients experienced access thrombosis, those immediately before the thrombosis were selected. Using these data, we calculated the access flow rate threshold for thrombosis occurrence by analyzing the receiver operating characteristic curve, and the patients were divided into two groups according to whether access flow rates were higher or lower than 400 mL/min. During a median follow-up period of 3.1 years, 4,510 access flows were measured (median measurements per patient, 33 times; interquartile range, 11-54). A total of 65 access thromboses and 19 abandonments were observed. Access thrombosis and loss were higher in the lowflow group than in the high-flow group. This study revealed that low access flow rates are strongly associated with access thrombosis occurrence and subsequent loss of arteriovenous fistulas in patients undergoing hemodialysis.

Keywords

References

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