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      Influencia del flujo del líquido de diálisis en los parámetros de calidad de la hemodiafiltración en línea post-dilucional Translated title: Influence of the dialysate flow on the quality parameters of post-dilution line hemodiafiltration

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          Abstract

          Resumen Introducción: La hemodiafiltración en línea post-dilucional es una variante de hemodiálisis que, según diferentes estudios puede aumentar la supervivencia de los pacientes. Inicialmente, y a diferencia de la hemodiálisis convencional, se utilizaban flujos de dializado muy elevados (hasta 700-800 ml/min); nuevos estudios cuestionaron la utilidad de elevar tanto este flujo en cuanto a eficacia depurativa. Objetivo: Analizar las diferencias producidas en Kt, Kt/V y volumen de infusión en esta técnica utilizando flujo de baño de diálisis a 600 ml/min y a 500 ml/min, así como evaluar la repercusión en el consumo de agua durante la sesión. Método: Se incluyeron 22 pacientes crónicos dializados con hemodiafiltración en línea post-dilucional en monitores Artis®. Se estudiaron 440 sesiones, 220 con cada flujo. Las variables estudiadas fueron edad, tiempo de permanencia en técnica, Kt, Kt/V y volumen de infusión. Resultados: De los 22 pacientes 7 son mujeres, la mediana de edad es de 79,5 años (rango 40-86) y la media de permanencia: 25,13±10,51 meses. Las medias con flujo de diálisis a 600 ml/min y a 500 ml/min fueron respectivamente: Kt:45,5±9,4 y 45,2±9,2 litros, Kt/V:1,52±0,33 y 1,51±0,33 y volumen de infusión: 21,84±4,50 y 21,94±4,51 litros. Conclusión: Según nuestros resultados se puede dializar en hemodiafiltración en línea post-dilucional con flujos de dializado de 500 ml/min sin menoscabo de los parámetros de calidad de hemodiálisis. La disminución del flujo del dializado de 600 a 500 ml/min en hemodiafiltración en línea post-dilucional no produce pérdida en los parámetros de calidad y permite de reducir el consumo de agua.

          Translated abstract

          Abstract Introduction: Online post-dilution hemodiafiltration is a variant of hemodialysis that, according to different studies, can increase patient survival. Initially, and unlike conventional hemodialysis, very high dialysate flows were used (up to 700-800 ml/min), new studies questioned the usefulness of elevation to achieve purifying efficacy. Objective: To analyze the differences produced in Kt, Kt/V and infusion volume in post-dilutional online hemodiafiltration using a dialysate flow at 600 ml/min and 500 ml/min, as well as to evaluate the impact on the consumption of water during the session. Method: 22 dialyzed chronic patients undergoing post-dilutional hemodiafiltration on Artis® monitors were included. 440 sessions were studied, 220 with each flow. Age, time of permanence in technique, Kt, Kt/V and infusion volume were studied. Results: Of the 22 patients, 7 were women, with a median age of 79.5 years (range 40-86) and a mean dialysis time of 25.13±10.51 months. The mean values for dialysate flows of 600 ml/min and 500 ml/min were respectively: Kt: 45.5±9.4 and 45.2±9.2 liters, Kt/V: 1.52±0.33 and 1.51±0.33, and infusion volume: 21.84±4.50 and 21.94±4.51 liters. Conclusions: According to our results, on-line post-dilution hemodiafiltration can be dialyzed with dialysate flows of 500 ml/min without impairing the hemodialysis quality parameters. The decrease in dialysate flow from 600 to 500 ml/min in post-dilutional on-line hemodiafiltration does not produce a loss in quality parameters and allows to reduce water consumption.

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          Most cited references13

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          KDOQI Clinical Practice Guideline for Hemodialysis Adequacy: 2015 update.

          (2015)
          The National Kidney Foundation's Kidney Disease Outcomes Quality Initiative (KDOQI) has provided evidence-based guidelines for all stages of chronic kidney disease (CKD) and related complications since 1997. The 2015 update of the KDOQI Clinical Practice Guideline for Hemodialysis Adequacy is intended to assist practitioners caring for patients in preparation for and during hemodialysis. The literature reviewed for this update includes clinical trials and observational studies published between 2000 and March 2014. New topics include high-frequency hemodialysis and risks; prescription flexibility in initiation timing, frequency, duration, and ultrafiltration rate; and more emphasis on volume and blood pressure control. Appraisal of the quality of the evidence and the strength of recommendations followed the Grading of Recommendation Assessment, Development, and Evaluation (GRADE) approach. Limitations of the evidence are discussed and specific suggestions are provided for future research.
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            The urea [clearance x dialysis time] product (Kt) as an outcome-based measure of hemodialysis dose.

            The normalized treatment ratio [Kt/V = the ratio of the urea clearance x time product to total body water] and the urea reduction ratio (URR) have become widely accepted measures of dialysis dose. Both are related to and derived from pharmacokinetic models of blood urea concentration during the dialysis cycle. Theoretical reconsideration of the models revealed that the premise about V on which they rest (that is, that V is a passive diluent with no survival-associated properties of its own) is flawed if the intended use of the models is for profiling clinical outcome (for example, mortality) rather than estimating urea concentration. As a proxy for body mass, V has survival-associated properties of its own. Thus, indexing clearance x time to body size could create an offsetting combination whereby one measure favorably associated with survival (Kt) is divided by another (for example, V). Observed clinical paradoxes support that interpretation. For example, patients with a low body mass have both higher URR and higher mortality than heavier patients. Increasing mortality is often observed at high URR, suggesting the possibility of "over-dialysis." Black patients tend to be treated at lower URR than whites but enjoy better survival on dialysis. Therefore, clearance x time was evaluated as an outcome-based measure of dialysis dose, not indexed to V, and various body size estimates were evaluated as separate and distinct measures.
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              European Best Practice Guidelines for Hemodialysis

              (2002)
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                Author and article information

                Journal
                enefro
                Enfermería Nefrológica
                Enferm Nefrol
                Sociedad Española de Enfermería Nefrológica (Madrid, Madrid, Spain )
                2254-2884
                2255-3517
                April 2021
                : 24
                : 1
                : 77-81
                Affiliations
                [1] Valladolid orgnameHospital Universitario Río Hortega orgdiv1Servicio de Nefrología España
                Article
                S2254-28842021000100008 S2254-2884(21)02400100008
                10.37551/s2254-28842021008
                a8b204f8-8222-4ab1-a112-2abd87500cf0

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 03 February 2021
                : 18 January 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 13, Pages: 5
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                SciELO Spain

                Categories
                Original Breve

                infusion volume,dialysate flow,Kt,hemodiafiltración en línea,flujo líquido de diálisis,kt,volumen de infusión,on-line hemodiafiltration

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