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August 8, 2026Journal of NephrologyOpen Access

Use of a sampler to collect spent dialysate in hemodialysis: a technical note

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Authors

MTMassimo TorreggianiRARaiyan AbdulrubARAlessandra Rutigliano

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Overview

Observational study evaluates reliable spent dialysate collection in chronic hemodialysis for improved efficiency assessment.

Key Points

  • To evaluate the reliability of the Theraflux® sampler for collecting spent dialysate in hemodialysis sessions.
  • Conducted observational study in a French dialysis center from November 2021 to February 2022.
  • Included 16 patients undergoing hemodiafiltration across 126 dialysis sessions for analysis.
  • Compared dialysate volume from the Theraflux® sampler to that from dialysis machine using Bland-Altman analysis.
  • Median difference between device-calculated volume and machine-calculated volume was 8.3 L (IQR 4.3-14.8), with a discrepancy of 7.4% (IQR 4.5-11.6%).
  • The sampler collected 1.02% (IQR 1.00-1.07%) and 0.96% (IQR 0.96-0.97%) of total dialysate according to machine and sampler values, respectively.
  • Excluding outliers improved agreement without reducing average bias.

Cite This Study

Torreggiani et al. (2026) studied this question.

synapsesocial.com/papers/6a76dae7f12abadc7981595ehttps://doi.org/10.1093/joneph/aajag217
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