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Abstract
Abstract Background and Aims OL-HDF provides multiple advantages and benefits to patients compared to conventional high-flow hemodialysis (HFHD). Current monitors have a wide variety of biosensors and devices that provide continuous information on the patient's biological parameter and the efficiency of the dialysis session. Monofrequency bioimpedance (BIVA) provides information regarding the state of hydration (HE) and nutrition (EN) of our patients. Method Observational study in 493 patients, distributed in 8 dialysis centers and with a three different model of dialysis monitor. Demographic data, dialysis techniques and regimens, mean values for one month of ultrafiltration rate readings and KT are analyzed. The continuous measurement of DD is estimated by the ion dialysance biosensor. The OL-HDF technique is post-dilutional. The BIVA measurement is performed between 10 and 30 minutes after the end of the session. The Kt/V is estimated from the total TBW (V) by BIVA, using the Watson and Hume-Wiers formulas. Statistical analysis: descriptive, t-Student for statistics of groups and independent samples, Chi square for the association in cross tables. Results See Table 1. Conclusion Obtaining lower dialysis dose values in OL-HDF than in HFHD in some monitor models, despite longer dialysis times and greater dialyzer surface area, is probably due to dilution due to post- re-infusion and/or to the positioning of the dialysance sensors within the hydraulic circuit. This makes us think about the advisability of maintaining urea Kt/V measurements, by laboratory, to ensure adequate dialysis quality.
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