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      Estudio comparativo en pacientes en Hemodiafiltración en línea postdilucional de alta eficacia con diferentes flujos de líquido dializante, tiempo programado y tiempo real Translated title: Comparative study on patients treated with post-dilution on-line haemodiafiltration, different flow rates of dialysis fluid, real dialysis time and prescribed time

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          Abstract

          La dosis de diálisis es un elemento fundamental en la diálisis adecuada y en la supervivencia del paciente. Entre los elementos que influyen en la misma destacan: tiempo, flujo sanguíneo (Qb), coeficiente de transferencia de masa de urea (KoA) y flujo del baño (Qd). El objetivo es evaluar si con Qd 800 ml/min y tiempo programado 240 minutos conseguimos mayor eficacia que con Qd 500 ml/min y tiempo programado 240 minutos y con Qd 500 l/min y tiempo efectivo 240 minutos. Pacientes y métodos Estudio prospectivo sobre población prevalente en hemodiálisis, con criterio de inclusión pacientes mayores de edad en hemodiafiltración on-line postdilucional con flujo sanguíneo adecuado. En cada paciente se realizan 18 sesiones consecutivas variando Qd y tiempo con siguiente esquema: Fase 1: 6 sesiones con Qd 800 ml/min y tiempo programado 240 minutos. Fase 2: 6 sesiones con Qd 500 ml/min y tiempo programado 240 minutos, Fase 3: 6 sesiones con Qd 500 ml/min y tiempo efectivo 240 minutos. El análisis estadístico se realiza mediante SPSS 13.0 para Windows. Las variables cuantitativas se expresan como media, desviación estándar y rango. Las variables cualitativas, como frecuencia y porcentaje. Resultados Analizamos 432 sesiones obteniendo Kt y Volumen total de reinfusión (VTR) mayores en la fase 3 del estudio con respecto a las otras dos, no existiendo diferencias significativas entre la fase 1 y 2. Discusión y conclusiones No existen diferencias en la eficacia dialítica entre Qd 500 ml/min y Qd 800 ml/min, mientras que con el aumento de 10 minutos de media en cada sesión, se incrementa la dosis de diálisis en 2,77 litros y el VTR en un 9%, reduciendo a la mitad el número de pacientes que no logran los 20 litros de volumen de reinfusión. Y esto, con un menor coste adicional especialmente por las diferencias de envasado del bicarbonato.

          Translated abstract

          The dialysis dose (DD) is a key element of dialysis adequacy and affects survival of patients undergoing dialysis. Some elements standing out concerning the DD are: dialysis time, blood flow rate (Qb), transfer area coefficient (K0A) and dialysate flow rate (Qd). The aim of this study is to find out whether Qd 800 ml / min and 240 minutes prescribed time is more effective than Qd 500 ml / min and 240 minutes prescribed time and also to compare Qd 500 ml/min and 240 minutes of real dialysis time. Patients and Methods A transversal prospective study was conducted of a population in dialysis, inclusion criteria being an adult treated with post-dilution on-line haemodiafiltration and sufficient blood flow rate. In all patients was performed 18 consecutive sessions varying Qd and time as follows: Stage 1: 6 sessions Qd 800 ml/min and prescribed time 240 minutes (F1) Stage 2: 6 sessions Qd 500 ml/min and prescribed time 240 minutes (F2) Stage 3: 6 sessions Qd 500 ml/min and real dialysis time 240 minutes (F3) Statistical analysis performed using SPSS 13.0 for Windows. Quantitative variables were expressed as mean, standard deviation and range, and qualitative variables expressed as frequency and percentage. Results 432 sessions analysed getting higher Kt and reinfusion volume (VTR) in stage 3 in relation to other stages. No significant difference between stage 1 and 2. Discussion and conclusions: No differences in dialysis efficacy Qd 500 ml / min versus Qd 800 ml / min. Nevertheless, increasing 10 minutes in each session, the dialysis dose increases 2.77 litres and VTR increases 9%, halving this way the number of patients that don´t reach 20 litres reinfusion volume. All this achieved with a lower fee due to the size difference bicarbonate concentrate packaging.

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          Most cited references32

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          Effects of dose of dialysis on morbidity and mortality.

          The annual mortality rate of patients on hemodialysis in the United States is 24.3%, substantially higher than the mortality of age-matched patients in Europe and Japan. Differences in the dose of dialysis received by US patients has been proposed as an important factor contributing to this high mortality rate. We undertook a prospective effort to increase the dose of dialysis delivered to 130 patients treated at an urban dialysis center affiliated with Vanderbilt University. From 1988 to 1991 the dose of dialysis, represented by the urea kinetic modelling parameter Kt/V (K = dialyzer clearance, t = dialysis time, V = volume of distribution of urea), has been gradually increased from a dose of 0.82 +/- 0.32 to 1.33 +/- 0.23. Concurrent with this increase, there was a reduction of the gross annual mortality rate from 22.8% in 1988 to 9.1% in 1991. To account for potential differences in patient characteristics during those years, we also calculated the number of expected deaths, based on data from the United States Renal Data System. The ratio of observed to expected deaths, termed the "standardized mortality rate," decreased from a value of 1.03 in 1988 to a value of 0.611 in 1991. In addition, the number of hospital days per patient per year decreased from 15.2 d/patient/yr to 10.3 d/patient/yr. We conclude that increasing the dose of delivered dialysis decreases the hospitalization and mortality rates of hemodialysis-dependent patients.
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            Tratado de hemodiálisis

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              Dosis de hemodiálisis: condición sine qua non de diálisis adecuada

              F Maduell (1999)
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                enefro
                Enfermería Nefrológica
                Enferm Nefrol
                Sociedad Española de Enfermería Nefrológica (Madrid, Madrid, Spain )
                2254-2884
                2255-3517
                September 2013
                : 16
                : 3
                : 155-160
                Affiliations
                [01] Cartagena orgnameHospital Santa Lucía orgdiv1Unidad de Hemodiálisis
                Article
                S2254-28842013000300003
                10.4321/S2254-28842013000300003
                1b7e92ad-69da-4395-90a3-b8f9bd99199d

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

                History
                : 16 August 2013
                : 10 August 2013
                : 26 August 2013
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 22, Pages: 6
                Product

                SciELO Spain


                Hemodiafiltración On-line,Flujo de líquido de diálisis,KT,Dosis de diálisis,Tiempo de sesión,Online haemodiafiltration,Dialysis fluid flow rate,Dialysis dose,Time of dialysis

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