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Inicio Revista Española de Anestesiología y Reanimación (English Edition) A pilot study into the use of Continuous Venous Hyperfiltration to manage patien...
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Vol. 66. Issue 7.
Pages 370-380 (August - September 2019)
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Vol. 66. Issue 7.
Pages 370-380 (August - September 2019)
Original article
A pilot study into the use of Continuous Venous Hyperfiltration to manage patients in a critical state with dysregulated inflammation
Estudio piloto sobre el uso de la Hiperfiltración Venosa Continua para el manejo de pacientes en estado crítico con inflamación desregulada
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R. García-Hernándeza,
Corresponding author
rafaghernandez@yahoo.es

Corresponding author.
, M.I. Espigares Lópeza, M.V. García-Palaciosb, R. Gámiz Sáncheza, F. Miralles-Aguiarc, E. Calderón Seoanea, A. Pernia Romeroa, L.M. Torresa, on behalf of the CONVEHY Research Group
a Facultativo especialista de Área de Anestesiología y Reanimación, H.U. Puerta del Mar, Cádiz, Spain
b Facultativo epecialista de Área de Medicina Preventiva, H.U. Puerta del Mar, Cádiz, Spain
c Residente de Anestesiología y Reanimación. Médico Especialista en Medicina Intensiva. H.U. Puerta del Mar, Cádiz, Spain
Components of the CONVEHY Research Group
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Figures (2)
Tables (4)
Table 1. Type of surgical intervention and reintervention in the 2 anticoagulation groups.
Table 2. Characteristics of clinical severity and approach used in each group of patients receiving heparin or citrate as anticoagulant and the time of onset (h).
Table 3. Clinical variables.
Table 4. Applicability and relevance of results.
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Abstract
Introduction

Haemofiltration paradigms used to manage critically ill patients with a dysregulated inflammatory response (DIR) assess kidney function to monitor its onset, adaptation, and completion. A Continuous Venous Hyperfiltration (CONVEHY) protocol is presented, in which a non-specific adsorption membrane (AN69-ST-Heparin Grafted) is used with citrate as an anticoagulant and substitution fluid. CONVEHY uses tools readily available to achieve kidney related and non-related objectives, and it is guided by the monitoring of pathophysiological responses.

Objectives

To compare the response to an AN69-ST-HG membrane when heparin (He, n=5: standard protocol) or citrate (Ci, n=6: CONVEHY protocol) was used to evaluate whether a larger study into the benefits of this protocol would be feasible.

Materials and methods

In a retrospective pilot study, the benefits of the CONVEHY protocol to manage patients with a DIR in a surgical critical care unit (CCUs) were assessed by evaluating the SOFA (Sequential Organ Failure Assessment) (He 11±2.35; Ci 11±3.63: p = 0.54) and APACHE II (He 28.60±9.40; Ci 24±8.46: p = 0.93) scores.

Results

Nights in hospital (He 35.2±16.3 nights; Ci 9±2.53: p = 0.004), hospital admission after discharge from the CCUs (He 40.25±21.82; Ci 13.2±4.09: p = 0.063), patients hospitalised >20 days (He 80%; Ci 0%: p = 0.048), days requiring mechanical ventilation (He 16±5.66; Ci 4±1.72: p = 0.004), and the predicted (55.39±26.13%) versus real mortality in both groups (9.1%: p = 0.004).

Conclusions

The CONVEHY protocol improves the clinical responses of patients with DIR, highlighting the potential value of performing larger and confirmatory studies.

Keywords:
Haemofiltration
Citrate
AN69-ST-heparin grafted
Dysregulated inflammatory response
Ischaemia–reperfusion injury
Hyperfiltration
Resumen
Introducción

Los paradigmas de la hemofiltración para manejar pacientes críticos con una respuesta inflamatoria desregulada (RID) evalúan la función renal para su inicio, adaptación y finalización. Presentamos la Hiperfiltración Venosa Continua (Protocolo CONVEHY), en el cual una membrana de adsorción inespecífica (AN69-ST-heparina anclada) se utiliza con citrato como líquido anticoagulante y de sustitución. El protocolo CONVEHY utiliza herramientas fácilmente disponibles para lograr objetivos renales y no renales, guiándose por las respuestas fisiopatológicas.

Objetivos

Comparar la respuesta a la membrana AN69-ST-HA cuando se utilizó heparina (He, n = 5: protocolo estándar) o citrato (Ci, n = 6: protocolo CONVEHY) para evaluar si fuera factible un estudio mayor sobre los beneficios de este protocolo.

Materiales y métodos

En un estudio retrospectivo, se evaluaron los beneficios del protocolo CONVEHY en pacientes con RID en una unidad de cuidados críticos quirúrgicos (UCCq), evaluando las puntuaciones SOFA (He 11±2,35; Ci 11±3,63; p = 0,54) y APACHE II (He 28,60±9,40; Ci 24±8,46; p = 0,93).

Resultados

Hospitalización (He 35,2±16,3 noches; Ci 9±2,53; p = 0,004), hospitalización tras el alta de UCCq (He 40,25±21,82; Ci 13,2±4,09; p = 0,063), pacientes hospitalizados > 20 días (He 80%; Ci 0%; p = 0,048), días con ventilación mecánica (He 16±5,66; Ci 4±1,72; p = 0,004) y la mortalidad predicha (55,39±26,13%) frente a la real en ambos grupos (9,1%; p = 0,004).

Conclusiones

El protocolo CONVEHY mejora las respuestas clínicas de los pacientes con una RID, destacando el valor potencial de realizar estudios más grandes y confirmatorios.

Palabras clave:
Hemofiltración
Citrato
AN69-ST-heparina anclada
Respuesta inflamatoria desregulada
Daño isquemia-reperfusión
Hiperfiltración

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