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Kidney Week

Abstract: TH-PO332

Effectiveness of Flow Volume Measurement Training Using Custom-Made Doppler Flow Simulator

Session Information

  • Vascular Access - I
    November 07, 2019 | Location: Exhibit Hall, Walter E. Washington Convention Center
    Abstract Time: 10:00 AM - 12:00 PM

Category: Dialysis

  • 704 Dialysis: Vascular Access


  • Kim, Cheolsu, Hallym University, Anyang, Korea (the Republic of)
  • Kim, Sung gyun, Hallym University, Anyang, Korea (the Republic of)
  • Lee, Hyungseok, Hallym University Sacred Heart Hospital, Anyang, Korea (the Republic of)
  • Joo, Narae, Hallym University, Anyang, Korea (the Republic of)

Group or Team Name

  • Department of Nephrology, Hallym University Sacred Heart Hospital

The purpose of this paper was to present the effectiveness of custom-made Doppler ultrasound (DU) flow simulator, vascular phantom, and Doppler test fluid in training dialysis staffs on the flow volume (FV) measurement for arteriovenous (AV) access of hemodialysis (HD) patients.


A DU flow simulator was constructed using a continuous renal replacement therapy machine. Vascular phantoms were made with a rubber enema tube and keyboard cleaning gel. Doppler test fluid consisted of freeze-dried instant coffee granules and 0.9% saline. This easy and affordable simulator was applied to the training DU flow volume measurement on 12 dialysis staffs who had never experienced DU examination. After 3 days of theoretical education, dialysis staffs performed DU on AV access of HD patients. Thereafter, they underwent a 3-day training course using the simulator and then measured FV of AV access again. Each dialysis staff assessed FV 3 times, and the mean values of measurements between pre and post-training were analyzed by paired t-test.


The difference in mean value of FV measurements from the reference value decreased from 131.6 ml/min to 62.5 ml/min (95% CI 30.0-108.0, P = 0.002), and the standard deviation of FV measurements were decreased from 96.9 ml/min to 47.0 ml/min (95% CI 7.9-91.8, P = 0.023) after DU training with the simulator.


The accuracy and reproducibility of FV measurement by dialysis staffs were markedly improved after training using the current simulator, and it may be helpful to medical practitioners participated in the management of AV access and HD treatment.