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and this lack of consensus explains why the incidences reported in different studies varied greatly from 5 to 25&#37;&#44; approximately&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;4&#44;5</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">At present&#44; and thanks to the recommendations of the ADQI<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and posteriorly the AKIN&#44;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> the panorama has changed&#44; and the detection of AKI is now based on standardized criteria&#8212;with the adoption of a common language that is facilitating access to uniform and easily reproducible information&#44; but which 10 years later obliges us to reconsider the true impact of AKI in our setting and to reassess the results obtained from the FRAMI survey&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> To this effect&#44; we have started a study &#40;COFRADE&#41; designed to determine the prevalence of AKI in our ICUs&#44; based on current diagnostic criteria&#46; In this context&#44; and in a first phase&#44; we have wished to define the current situation regarding AKI diagnostic and preventive methods&#44; as well as the standardization of RRT in the different Units participating in the study&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Our aim is to present the results of this initial survey and thus offer a perspective of the current situation found in our ICUs regarding the diagnosis and management of AKI&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Materials and methods</span><p id="par0025" class="elsevierStylePara elsevierViewall">The present work represents the initial phase of a prospective observational study on the prevalence of renal dysfunction in the ICU &#40;the COFRADE study&#41;&#44; designed to analyze the prevalence of AKI and the application of RRT&#46; This study comprises two phases&#58; &#40;a&#41; a first phase in which the participating Units were asked to complete a questionnaire designed to define the diagnostic habits and preventive measures applied in each Unit&#59; and &#40;b&#41; a second phase in which an AKI prevalence study is planned&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">The study was made to evaluate application in our Units of the current criteria for the detection of renal dysfunction &#40;stratification using the RIFLE<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and AKIN<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> systems&#41; and the use of protocols designed to detect or prevent AKI&#46; The investigator in charge in each of the participating Units was requested to supply information on the existence of defined AKI prevention protocols &#40;referred to toxic agents or contrast media&#41;&#44; the method used to estimate renal function&#44; the application of AKI stratification systems&#44; and the existence of protocols referred to RRT management&#44; drug adjustment&#44; or continued personnel training in the use of the techniques&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">The study was approved by the Clinical Research Ethics Committees of each of the participating centers&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The data are presented as values &#40;percentages&#41;&#44; and comparisons were made using the chi-squared test&#44; with a significance level of 95&#37; &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05&#41;&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Results</span><p id="par0045" class="elsevierStylePara elsevierViewall">A total of 32 hospitals participated in the COFRADE study&#58; 10 in the Community of Madrid&#44; 9 in Andalusia&#44; three in Catalonia and the Valencian Community&#44; and one in the Canary Islands&#44; Castilla La Mancha&#44; Castilla-Le&#243;n&#44; the Community of Murcia&#44; Extremadura&#44; Galicia and the Basque Country&#46; Twenty-three of these hospitals were third-level centers&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">A total of 42 ICUs were involved&#44; with a total of 826 beds&#46; Of these ICUs&#44; 30 were general Units&#44; three medical Units&#44; three surgical Units&#44; and 6 specialized Units&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">In relation to the estimation of glomerular filtration&#44; 24-h urine creatinine clearance was applied in 12 Units &#40;28&#46;6&#37;&#41;&#44; and short duration urine creatinine clearance in 5 Units &#40;11&#46;9&#37;&#41;&#46; In turn&#44; 9 Units &#40;21&#46;4&#37;&#41; made use of equations involving the determination of plasma creatinine &#40;the Cockroft&#8211;Gault<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a> formula in 7 Units and the MDRD<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> in two Units&#41;&#44; while the remaining 16 Units &#40;38&#46;1&#37;&#41; only used Crs for this purpose&#46; In no case was cystatin-C used as estimation method&#46; There were no differences dependent upon the type of hospital or Unit surveyed &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0060" class="elsevierStylePara elsevierViewall">Fourteen ICUs &#40;33&#46;3&#37;&#41; adopted the RIFLE scale&#44; while one Unit &#40;2&#46;4&#37;&#41; incorporated the AKIN system&#44; and two Units &#40;4&#46;8&#37;&#41; adopted both scales&#46; In contrast&#44; 25 Units &#40;59&#46;5&#37;&#41; admitted that they applied neither system&#46; Again in this case there was no correlation between the type of Unit and the use of the different scales&#44; though there were differences referred to the type of hospital &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0065" class="elsevierStylePara elsevierViewall">Twenty Units &#40;47&#46;6&#37;&#41; had no defined protocols for the prevention of AKI&#44; while 14 Units &#40;33&#46;3&#37;&#41; presented contrast utilization protocols&#44; three Units &#40;7&#46;1&#37;&#41; had nephrotoxic drug use protocols&#44; and 5 Units &#40;11&#46;9&#37;&#41; had both contrast and drug use protocols&#46; The hospital or Unit type was not related to this variable&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">Thirty Units &#40;71&#46;4&#37;&#41; claimed to have continued training programs for the management of RRT&#46; In 26 Units &#40;61&#46;9&#37;&#41; there were specific protocols for application of the technique &#40;without differences dependent upon the type of hospital or ICU&#41;&#44; and of these Units&#44; 24 had a drug adjustment protocol for patients subjected to RRT&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Discussion</span><p id="par0075" class="elsevierStylePara elsevierViewall">Following the publication of the recommendations of the ADQI<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and posteriorly the AKIN<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> referred to the need to stratify AKI&#44; different studies have described a significant change in the way to approach renal dysfunction&#44; and in fact the incidence figures<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> are now considered to be far higher than the previous reference values<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;4</span></a> for general critical care patients&#46; According to our results&#44; and despite the existence of these recommendations&#44; there is still great variability regarding the AKI detection methods used&#44; with little application of the injury stratification systems&#46; In this context&#44; it is clear that the management of RRT &#40;although only a part of the problem in patients with AKI&#41; generates more concern than the prevention or diagnosis of AKI among intensivists in this country&#46;</p><p id="par0080" class="elsevierStylePara elsevierViewall">In recent years there have been changes in the physiopathological concepts of AKI&#44; particularly referred to dysfunction of ischemic origin&#46; This is important&#44; considering that acute tubular necrosis is the main cause of AKI in critical patients&#44; especially in relation to severe sepsis&#46;<a class="elsevierStyleCrossRefs" href="#bib0055"><span class="elsevierStyleSup">11&#44;12</span></a> This increased knowledge of the physiopathology of renal dysfunction from the moment of primary injury has led to an interest in improving the diagnosis and developing new and better methods to facilitate early diagnosis and thus minimize secondary kidney damage&#46; In this context&#44; the study of new kidney injury biomarkers is one of the fields of interest in AKI&#46;<a class="elsevierStyleCrossRefs" href="#bib0065"><span class="elsevierStyleSup">13&#44;14</span></a></p><p id="par0085" class="elsevierStylePara elsevierViewall">The recommendations of the ADQI<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> referred to the diagnosis and risk stratification of AKI&#44; as reflected in the RIFLE system&#44; were published in 2004&#46; This system is based on the detection of evolutive changes referred to patient basal glomerular filtration &#40;GF&#41; through changes in urine volume or based on the estimation of GF from Crs or creatinine clearance &#40;ClCr&#41;&#46; One year later&#44; in 2007&#44; the AKIN<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> group redefined this system once it became clear &#40;initially in studies in heart surgery and posteriorly in other population groups&#41;<a class="elsevierStyleCrossRefs" href="#bib0075"><span class="elsevierStyleSup">15&#44;16</span></a> that also small Crs increments imply a poorer prognosis&#44; independently of the basal situation&#46; The AKIN system stratifies patients into three levels according to changes in diuresis or Crs increments&#44; without considering other GF estimators&#44; and incorporating absolute Crs elevations &#40;an increase of 0&#46;3<span class="elsevierStyleHsp" style=""></span>mg&#47;dl would classify a patient as AKIN 1&#44; independently of the previous basal level&#41;&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">On furthermore considering that when Crs rises to above 2<span class="elsevierStyleHsp" style=""></span>mg&#47;dl&#44; the functional kidney mass &#40;i&#46;e&#46;&#44; the &#8220;kidney reserve&#8221;&#41; has dropped to 50&#37;&#44;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">17</span></a> it is not surprising that the RIFLE and AKIN systems&#44; by detecting small Crs increments&#44; are of great interest&#44; and that the previous incidence data&#8212;mostly based on this 2<span class="elsevierStyleHsp" style=""></span>mg&#47;dl cutoff value&#8212;possibly greatly underestimated the true incidence of AKI&#46; It also must be considered that both systems &#40;RIFLE and AKIN&#41; have already been widely validated and show good correlation to mortality&#46;<a class="elsevierStyleCrossRefs" href="#bib0090"><span class="elsevierStyleSup">18&#8211;22</span></a> However&#44; despite the interest in these new defining systems&#44; to date they have shown scant penetration in Spanish ICUs&#44; since less than 40&#37; of our Units use such instruments&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Another aspect to be taken into account in assessing the detection of AKI is the GF estimator used&#46; In clinical practice&#44; the measurement of urine output is a simple method and in most cases anticipates Crs elevation&#59; as a result&#44; it is widely used for the initial detection of renal dysfunction&#44;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">23</span></a> although as a parameter it offers very poor specificity&#46; Both systems define Crs as an alternative estimator&#44; since it is easy to determine and is universally available&#46; However&#44; Crs elevation shows a delay or lag after the lowering of GF&#44; and does not exhibit a linear relationship with decreasing GF&#46; These aspects may pose an important problem for a system precisely aiming to secure the early detection of reductions in GF&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">Taking into account that kidney function in critical patients is not stable&#44; it seems reasonable that serial measurements of ClCr &#40;which can be made with short duration diuresis&#44; thereby allowing for easy reproducibility&#41;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a> are able to detect such changes earlier than Crs &#8211; though the use of this estimator is only contemplated in the RIFLE &#40;which in our opinion represents an advantage over AKIN&#41;&#46; In our experience there are discrepancies in stratifying patients with the RIFLE system according to whether it is based on Crs or ClCr&#44; in the sense that utilization of the latter parameter is more closely related to the prognosis&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">22</span></a> It is notorious that in the surveyed ICUs&#44; ClCr was the parameter most commonly used to estimate GF&#44; and it is even more surprising that 70&#37; of the Units used determinations based on 24-h urine&#8212;these data being discordant with those obtained 10 years ago in the FRAMI study&#44;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> where few Units made use of ClCr&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">Crs is the next most common estimator used in our ICUs&#44; though in fact it constitutes the most common estimator &#40;59&#37;&#41; on considering those Units that use it incorporated to equations&#46; This is not surprising&#44; since the method is simple and reproducible&#44; and very familiar in the clinical setting&#46; What is surprising is that Crs is not incorporated in either of the available and validated systems &#40;RIFLE or AKIN&#41; with the purpose of stratifying patients and of offering a tool for follow-up capable of contributing relevant clinical information &#40;this in our view being the most attractive aspect of these classification systems&#41;&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">On the other hand&#44; we see that the use of formulas remains a generalized practice despite the fact that they were specifically developed for application in chronic patients&#46; However&#44; a significant percentage of centers &#40;21&#37;&#41; apply them to estimate GF in patients with AKI&#44; even though none of them are useful in critically ill patients&#46;<a class="elsevierStyleCrossRefs" href="#bib0120"><span class="elsevierStyleSup">24&#44;25</span></a></p><p id="par0115" class="elsevierStylePara elsevierViewall">None of the Units&#44; regardless of their size&#44; have incorporated biomarkers or cystatin-C in routine use&#44; though we have evidenced that their application is being studied in some Units &#40;including our own&#41;&#44; in concrete patient groups&#46; The incorporation of these new biomarkers may give added impulse to the early detection of AKI&#44; though considering the current situation found in Spanish ICUs &#40;as reflected by our data&#41;&#44; their incorporation to the clinical setting does not appear due anytime soon&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">Of note is the observation that no intervention for the diagnosis&#44; stratification or prevention of AKI has been protocolized in the majority of our Units&#44; since less than 50&#37; of them admit the use of protocols in this sense&#46; Furthermore&#44; those protocols that do exist are particularly centered on the prevention of nephropathy referred to contrast injection&#44; and in only very sporadic cases to drug adjustment&#46; Specifically&#44; only 12&#37; of the Units have protocols which include these two very important aspects&#46; This is in stark contrast to the use of RRT&#44; since most of the Units have written protocols for applying such techniques&#46; This may be attributed to the fact that the diagnosis of AKI is well assimilated in our usual clinical practice&#44; while RRT is a relatively recent practice with which we have had to become quickly familiarized in view of the advances made in this field&#46; This has created the need to learn and reflect the practice in written protocols&#59; indeed&#44; almost 60&#37; of the Spanish Units have protocols for drug adjustment associated to the use of RRT&#44; while only 7&#37; have protocols for drug adjustment in relation to AKI&#46; In fact&#44; in relation to training&#44; over 70&#37; of the Units reported having active training programs in RRT&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">The described results of course are based on the analysis of a survey&#44; and so must be viewed with caution&#46; On the other hand&#44; and as the main weakness of this study&#44; the sample comprised a highly selected group of Units&#8212;which questions the external validity of the findings&#46; Nevertheless&#44; this bias further emphasizes the problem&#44; since the fact that the Units in the study largely participated because of their involvement and interest in AKI leads us to suspect that the results obtained in a larger study would have proven even less adequate&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">We consider it necessary to change the strategy of our approach to AKI&#44; with incorporation of the recommendations of the ADQI and AKIN conferences to our daily clinical practice&#44; since this would directly result in early detection&#46; Simply acquiring the habit of detecting patients at risk and of reflecting the fact in their case history can help improve management and reduce secondary renal damage&#44; independently of the notion that different software applications &#40;where available&#41; can draw our attention through specific alerts when kidney function is altered&#8212;as is the case in our center&#46; Undoubtedly&#44; the incorporation of written protocols for the prevention and detection of AKI&#44; and for RRT&#44; would have a positive effect upon patient safety&#8212;facilitating secondary prevention &#40;limitation of damage&#41; and avoiding classification error and iatrogenic problems &#40;&#8220;dialytrauma&#8221;&#41;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a> in RRT&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Conflicts of interest</span><p id="par0135" class="elsevierStylePara elsevierViewall">The authors declare no conflicts of interest&#46;</p></span></span>"
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            0 => "Acute kidney injury"
            1 => "Renal replacement therapies"
            2 => "<span class="elsevierStyleItalic">Acute Dialysis Quality Initiative</span>"
            3 => "<span class="elsevierStyleItalic">Acute Kidney Injury Network</span>"
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          "palabras" => array:5 [
            0 => "Disfunci&#243;n renal aguda"
            1 => "Depuraci&#243;n extrarrenal"
            2 => "<span class="elsevierStyleItalic">Acute Dialysis Quality Initiative</span>"
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        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To evaluate variability in the detection and prevention of acute kidney injury &#40;AKI&#41; in the intensive care unit &#40;ICU&#41;&#44; and application of the international recommendations in this field &#40;Acute Dialysis Quality Initiative &#91;ADQI&#93; and Acute Kidney Injury Network &#91;AKIN&#93;&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Design</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A prospective&#44; observational&#44; multicenter study&#46;</p> <span class="elsevierStyleSectionTitle">Setting</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">A total of 42 ICUs in 32 hospitals &#40;78&#37; in third level hospitals and 70&#46;7&#37; general units&#41; recruited for a study on the prevalence of AKI &#40;COFRADE&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Interventions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Survey&#46;</p> <span class="elsevierStyleSectionTitle">Variables</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Aspects related to AKI detection and prevention and renal replacement therapy &#40;RRT&#41; protocols&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">The method used for estimating glomerular filtration rate was serum creatinine &#40;Crs&#41; in 36&#46;6&#37;&#44; creatinine clearance in 41&#46;5&#37; and equations in 22&#37;&#59; none reported using cystatin-C&#46; Only 39&#46;1&#37; ICUs acknowledged the use of stratification systems &#40;13 RIFLE and 3 AKIN&#41;&#46;</p><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">A total of 48&#46;8&#37; ICUs had no written protocols for AKI prevention&#44; 31&#46;7&#37; reported using them only for contrast nephropathy&#44; 7&#46;3&#37; for nephrotoxic drugs and 12&#46;2&#37; for both&#46;</p><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">In contrast&#44; 63&#46;4&#37; participants had written protocols for RRT&#44; 70&#46;7&#37; had implemented a training program&#44; and 53&#46;7&#37; had some method for adjusting doses of drugs when on RRT&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">We observed an important variability regarding diagnostic criteria and prevention of AKI in Spanish ICUs&#44; the application of ADQI or AKIN recommendations still being low in our units&#46; RRT seems to generate more concern among our intensivists than AKI management&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Evaluar la variabilidad en la detecci&#243;n y prevenci&#243;n de la disfunci&#243;n renal aguda &#40;DRA&#41; en las unidades de cuidados intensivos &#40;UCI&#41;&#44; as&#237; como la aplicaci&#243;n de recomendaciones internacionales en este campo &#40;<span class="elsevierStyleItalic">Acute Dialysis Quality Initiative</span> &#91;ADQI&#93; y <span class="elsevierStyleItalic">Acute Kidney Injury Network</span> &#91;AKIN&#93;&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Dise&#241;o</span><p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Estudio multic&#233;ntrico prospectivo descriptivo&#46;</p> <span class="elsevierStyleSectionTitle">&#193;mbito</span><p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Un total de 42 UCI &#40;70&#44;7&#37; generales&#41; en 32 hospitales &#40;78&#37; de tercer nivel&#41;&#44; participantes en un estudio de prevalencia de DRA &#40;COFRADE&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Intervenciones</span><p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Encuesta&#46;</p> <span class="elsevierStyleSectionTitle">Variables de inter&#233;s</span><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">M&#233;todos de detecci&#243;n y prevenci&#243;n de DRA y existencia de protocolos para depuraci&#243;n extrarrenal &#40;TDE&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Para la estimaci&#243;n del filtrado glomerular se usa la creatinina s&#233;rica en el 36&#44;6&#37;&#44; el aclaramiento de creatinina en el 41&#44;5&#37;&#44; ecuaciones basadas en una muestra de creatinina s&#233;rica en 22&#37; y creatinina s&#233;rica aislada en el resto&#59; en ning&#250;n caso se utiliza la cistatina-C&#46;</p><p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">Solo el 39&#44;1&#37; de las UCI aplica sistemas de estratificaci&#243;n &#40;13 RIFLE y 3 AKI&#41;&#46; El 48&#44;8&#37; no cuenta con protocolos de prevenci&#243;n de DRA&#44; el 31&#44;7&#37; los tiene para nefropat&#237;a por contraste&#44; el 7&#44;3&#37; para manejo de nefrot&#243;xicos y el 12&#44;2&#37; para ambos&#46;</p><p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">Por contra&#44; el 63&#44;4&#37; de las unidades cuenta con protocolos de manejo de TDE&#44; el 70&#44;7&#37; aplica programas de formaci&#243;n continuada para estas y el 53&#44;7&#37; cuenta con protocolos de ajuste de dosis de f&#225;rmacos en estos casos&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">Existe amplia variabilidad en cuanto al m&#233;todo de detecci&#243;n de la DRA en nuestras unidades&#44; con escasa aplicaci&#243;n de sistemas de estratificaci&#243;n de da&#241;o&#46; El manejo de las TDE despierta m&#225;s inquietud que la prevenci&#243;n o el diagn&#243;stico de la DRA&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara">Please cite this article as&#58; Herrera-Guti&#233;rrez ME&#44; et al&#46; Variabilidad en los criterios de definici&#243;n y m&#233;todos de detecci&#243;n de la disfunci&#243;n renal en las unidades de cuidados intensivos &#191;se aplican los consensos internacionales para el diagn&#243;stico de la disfunci&#243;n renal&#63; Med Intensiva&#46; 2012&#59;36&#58;264&#8211;9&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara">This study has the scientific support of the <span class="elsevierStyleGrantSponsor">SEMICYUC</span>&#46;</p>"
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            "apendice" => "<p id="par0140" class="elsevierStylePara elsevierViewall">Investigators of the COFRADE study working group&#58; <span class="elsevierStyleBold">Coordination</span>&#58; Herrera Guti&#233;rrez ME&#44; Seller P&#233;rez G&#44; S&#225;nchez-Izquierdo Riera JA&#44; Maynar Moliner J&#46; <span class="elsevierStyleBold">Investigators</span>&#58; Hospital Cl&#237;nic Barcelona&#58; <span class="elsevierStyleItalic">Nephrology</span>&#58; P&#233;rez N&#59; <span class="elsevierStyleItalic">Hepatology</span>&#58; Acevedo J&#44; Mas A&#44; Castro M&#59; <span class="elsevierStyleItalic">General ICU</span>&#58; Nicolas JM&#59; <span class="elsevierStyleItalic">Surgical ICU</span>&#58; Zavala E&#44; Adalia R&#44; Tercero FJ&#59; <span class="elsevierStyleItalic">Nephrological ICU</span>&#58; Poch E&#44; Serra N&#59; <span class="elsevierStyleItalic">Cardiological ICU</span>&#58; Bosch Genover X&#59; <span class="elsevierStyleItalic">Respiratory ICU</span>&#58; Badia JR&#59; <span class="elsevierStyleItalic">Cardiac surgery ICU</span>&#58; Cartana R&#59; <span class="elsevierStyleItalic">Anesthesia and resuscitation</span>&#58; Fontanals J&#46; Hospital Cl&#237;nico San Carlos Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ortu&#241;o And&#233;riz F&#46; Hospital Costa del Sol M&#225;laga&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Fern&#225;ndez Garc&#237;a MI&#46; Hospital de Alcorc&#243;n Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; N&#250;&#241;ez Reiz D&#46; Hospital de Cruces Bilbao&#58; <span class="elsevierStyleItalic">Anesthesia and resuscitation</span>&#58; Lekerika N&#59; <span class="elsevierStyleItalic">ICU</span>&#58; S&#225;nchez A&#46; Hospital de Guadalajara Guadalajara&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Benito Puncel C&#44; Borrallo JM&#46; Hospital de la Santa Creu i San Pau Barcelona&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Roglan Piqueras A&#44; Rodr&#237;guez L&#243;pez M&#46; Hospital del Norte Madr&#237;d&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Gonz&#225;lez Arenas MP&#46; Hospital del Sureste Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ochoa Calero M&#44; Albert de la Cruz P&#44; Cruz Tejedor M&#46; Hospital del Tajo Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ballesteros Ortega D&#46; Hospital Fundaci&#243;n Jim&#233;nez D&#237;az Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Alcal&#225; Llorente MA&#44; P&#233;rez Calvo C&#44; Oeding Angulo G&#46; Hospital General Universitario Asociado Castell&#243;n&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Mas Font S&#44; Gonz&#225;lez Luis R&#44; Ferrandiz Sell&#233;s A&#46; Hospital General Yag&#252;e Burgos&#58; <span class="elsevierStyleItalic">ICU</span>&#58; L&#243;pez Pueyo MJ&#44; Llata Rodr&#237;guez L&#44; Perea Rodr&#237;guez ME&#46; Hospital Germans Trias i Pujol Badalona&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Tomasa Irriguible TM&#46; Hospital Ram&#243;n y Cajal Madrid&#58; <span class="elsevierStyleItalic">Anesthesia and resuscitation</span>&#58; Candela-Toha A&#59; <span class="elsevierStyleItalic">ICU</span>&#58; Li&#233;tor Villajos JA&#46; Hospital Severo Ochoa Madr&#237;d&#58; <span class="elsevierStyleItalic">ICU</span>&#58; L&#243;pez Mart&#237;nez J&#44; Chamorro Borraz N&#44; Su&#225;rez Saiz J&#46; Hospital Torrec&#225;rdenas Almer&#237;a&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ramos Cuadra JA&#44; Calder&#243;n Rodr&#237;guez A&#44; Rodr&#237;guez Casta&#241;o R&#46; Hospital Universitario 12 de Octubre Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Flordelis Lasierra JL&#44; Mohedano G&#243;mez A&#44; P&#233;rez Vela JL&#44; Terceros L&#46; Hospital Universitario Carlos Haya M&#225;laga&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Lozano S&#225;ez R&#44; Olalla Garc&#237;a R&#46; Hospital Universitario de Canarias Tenerife&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Lorenzo de la Pe&#241;a L&#44; P&#233;rez Mart&#237;nez N&#46; Hospital Universitario Doctor Peset Valencia&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Zaragoza R&#46;&#44; Casanoves Laparra E&#44; Montoro Lozano Y&#46; Hospital Universitario Infanta Cristina Badajoz&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Robles Marcos M&#44; Almaraz Velarde R&#44; Trasmonte Mart&#237;nez MV&#46; Hospital Universitario La Paz Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Garc&#237;a-de-Lorenzo A&#44; S&#225;nchez M&#44; Perales E&#46; Hospital Universitario Puerta del Mar C&#225;diz&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Sierra Camerino R&#44; S&#225;nchez Rodr&#237;guez AC&#46; Hospital Vega Baja Orihuela&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Gim&#233;nez-Esparza Vich C&#44; P&#233;rez Mart&#237;nez D&#44; Portillo Requena C&#46; Hospital Universitario Virgen de la Arrixaca Murcia&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ros Mart&#237;nez J&#44; Llamas L&#225;zaro C&#46; Hospital Virgen de la Victoria M&#225;laga&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Daga Ruiz D&#44; Vidal Hern&#225;ndez Rodr&#237;guez J&#46; Hospital Virgen de las Nieves Granada&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Guerrero L&#243;pez F&#46; Hospital Universitario Virgen de Valme Sevilla&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Herrera Rojas D&#44; &#218;beda Iglesias A&#44; Contreras del Pino T&#46; Hospital Virgen del Roc&#237;o Sevilla&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Hinojosa P&#233;rez R&#46; Hospital Universitario Virgen Macarena Sevilla&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Arenzana Seisdedos A&#44; Ib&#225;&#241;ez Cuadros S&#46; Hospital Xeral Lugo&#58; <span class="elsevierStyleItalic">ICU</span>&#58; &#193;lvarez Montero L&#44; Nespereira Jato V&#44; Saornil Agote O&#46;</p>"
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Original
Variability in renal dysfunction defining criteria and detection methods in intensive care units: Are the international consensus criteria used for diagnosing renal dysfunction?
Variabilidad en los criterios de definición y métodos de detección de la disfunción renal en las unidades de cuidados intensivos ¿se aplican los consensos internacionales para el diagnóstico de la disfunción renal?
M.E. Herrera-Gutiérreza,
Corresponding author
mehguci@gmail.com

Corresponding author.
, G. Seller-Péreza, J. Maynar-Molinerb, J.Á. Sánchez-Izquierdo Rierac, investigators of the COFRADE study
a Unidad de Cuidados Intensivos, Complejo Universitario Carlos Haya, Málaga, Spain
b Unidad de Cuidados Intensivos, Hospital Santiago, Vitoria-Gasteiz, Spain
c Unidad de Cuidados Intensivos, Hospital 12 de Octubre, Madrid, Spain
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">The development of AKI in critical patients produces an increase in morbidity&#8211;mortality and in the costs of associated treatment&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#8211;4</span></a> According to the FRAMI study&#44;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> the incidence in our setting was 5&#46;7&#37; ten years ago&#8212;this figure being very similar to the incidence reported by the BEST survey&#44;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> conducted at the time of the FRAMI study<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> and likewise involving the use of a Crs cutoff value of 2<span class="elsevierStyleHsp" style=""></span>mg&#47;dl for defining AKI&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">At that time the differences in diagnostic thresholds were considerable&#44; and this lack of consensus explains why the incidences reported in different studies varied greatly from 5 to 25&#37;&#44; approximately&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;4&#44;5</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">At present&#44; and thanks to the recommendations of the ADQI<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and posteriorly the AKIN&#44;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> the panorama has changed&#44; and the detection of AKI is now based on standardized criteria&#8212;with the adoption of a common language that is facilitating access to uniform and easily reproducible information&#44; but which 10 years later obliges us to reconsider the true impact of AKI in our setting and to reassess the results obtained from the FRAMI survey&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> To this effect&#44; we have started a study &#40;COFRADE&#41; designed to determine the prevalence of AKI in our ICUs&#44; based on current diagnostic criteria&#46; In this context&#44; and in a first phase&#44; we have wished to define the current situation regarding AKI diagnostic and preventive methods&#44; as well as the standardization of RRT in the different Units participating in the study&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Our aim is to present the results of this initial survey and thus offer a perspective of the current situation found in our ICUs regarding the diagnosis and management of AKI&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Materials and methods</span><p id="par0025" class="elsevierStylePara elsevierViewall">The present work represents the initial phase of a prospective observational study on the prevalence of renal dysfunction in the ICU &#40;the COFRADE study&#41;&#44; designed to analyze the prevalence of AKI and the application of RRT&#46; This study comprises two phases&#58; &#40;a&#41; a first phase in which the participating Units were asked to complete a questionnaire designed to define the diagnostic habits and preventive measures applied in each Unit&#59; and &#40;b&#41; a second phase in which an AKI prevalence study is planned&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">The study was made to evaluate application in our Units of the current criteria for the detection of renal dysfunction &#40;stratification using the RIFLE<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and AKIN<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> systems&#41; and the use of protocols designed to detect or prevent AKI&#46; The investigator in charge in each of the participating Units was requested to supply information on the existence of defined AKI prevention protocols &#40;referred to toxic agents or contrast media&#41;&#44; the method used to estimate renal function&#44; the application of AKI stratification systems&#44; and the existence of protocols referred to RRT management&#44; drug adjustment&#44; or continued personnel training in the use of the techniques&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">The study was approved by the Clinical Research Ethics Committees of each of the participating centers&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The data are presented as values &#40;percentages&#41;&#44; and comparisons were made using the chi-squared test&#44; with a significance level of 95&#37; &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05&#41;&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Results</span><p id="par0045" class="elsevierStylePara elsevierViewall">A total of 32 hospitals participated in the COFRADE study&#58; 10 in the Community of Madrid&#44; 9 in Andalusia&#44; three in Catalonia and the Valencian Community&#44; and one in the Canary Islands&#44; Castilla La Mancha&#44; Castilla-Le&#243;n&#44; the Community of Murcia&#44; Extremadura&#44; Galicia and the Basque Country&#46; Twenty-three of these hospitals were third-level centers&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">A total of 42 ICUs were involved&#44; with a total of 826 beds&#46; Of these ICUs&#44; 30 were general Units&#44; three medical Units&#44; three surgical Units&#44; and 6 specialized Units&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">In relation to the estimation of glomerular filtration&#44; 24-h urine creatinine clearance was applied in 12 Units &#40;28&#46;6&#37;&#41;&#44; and short duration urine creatinine clearance in 5 Units &#40;11&#46;9&#37;&#41;&#46; In turn&#44; 9 Units &#40;21&#46;4&#37;&#41; made use of equations involving the determination of plasma creatinine &#40;the Cockroft&#8211;Gault<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a> formula in 7 Units and the MDRD<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> in two Units&#41;&#44; while the remaining 16 Units &#40;38&#46;1&#37;&#41; only used Crs for this purpose&#46; In no case was cystatin-C used as estimation method&#46; There were no differences dependent upon the type of hospital or Unit surveyed &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0060" class="elsevierStylePara elsevierViewall">Fourteen ICUs &#40;33&#46;3&#37;&#41; adopted the RIFLE scale&#44; while one Unit &#40;2&#46;4&#37;&#41; incorporated the AKIN system&#44; and two Units &#40;4&#46;8&#37;&#41; adopted both scales&#46; In contrast&#44; 25 Units &#40;59&#46;5&#37;&#41; admitted that they applied neither system&#46; Again in this case there was no correlation between the type of Unit and the use of the different scales&#44; though there were differences referred to the type of hospital &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0065" class="elsevierStylePara elsevierViewall">Twenty Units &#40;47&#46;6&#37;&#41; had no defined protocols for the prevention of AKI&#44; while 14 Units &#40;33&#46;3&#37;&#41; presented contrast utilization protocols&#44; three Units &#40;7&#46;1&#37;&#41; had nephrotoxic drug use protocols&#44; and 5 Units &#40;11&#46;9&#37;&#41; had both contrast and drug use protocols&#46; The hospital or Unit type was not related to this variable&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">Thirty Units &#40;71&#46;4&#37;&#41; claimed to have continued training programs for the management of RRT&#46; In 26 Units &#40;61&#46;9&#37;&#41; there were specific protocols for application of the technique &#40;without differences dependent upon the type of hospital or ICU&#41;&#44; and of these Units&#44; 24 had a drug adjustment protocol for patients subjected to RRT&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Discussion</span><p id="par0075" class="elsevierStylePara elsevierViewall">Following the publication of the recommendations of the ADQI<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> and posteriorly the AKIN<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> referred to the need to stratify AKI&#44; different studies have described a significant change in the way to approach renal dysfunction&#44; and in fact the incidence figures<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> are now considered to be far higher than the previous reference values<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;4</span></a> for general critical care patients&#46; According to our results&#44; and despite the existence of these recommendations&#44; there is still great variability regarding the AKI detection methods used&#44; with little application of the injury stratification systems&#46; In this context&#44; it is clear that the management of RRT &#40;although only a part of the problem in patients with AKI&#41; generates more concern than the prevention or diagnosis of AKI among intensivists in this country&#46;</p><p id="par0080" class="elsevierStylePara elsevierViewall">In recent years there have been changes in the physiopathological concepts of AKI&#44; particularly referred to dysfunction of ischemic origin&#46; This is important&#44; considering that acute tubular necrosis is the main cause of AKI in critical patients&#44; especially in relation to severe sepsis&#46;<a class="elsevierStyleCrossRefs" href="#bib0055"><span class="elsevierStyleSup">11&#44;12</span></a> This increased knowledge of the physiopathology of renal dysfunction from the moment of primary injury has led to an interest in improving the diagnosis and developing new and better methods to facilitate early diagnosis and thus minimize secondary kidney damage&#46; In this context&#44; the study of new kidney injury biomarkers is one of the fields of interest in AKI&#46;<a class="elsevierStyleCrossRefs" href="#bib0065"><span class="elsevierStyleSup">13&#44;14</span></a></p><p id="par0085" class="elsevierStylePara elsevierViewall">The recommendations of the ADQI<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a> referred to the diagnosis and risk stratification of AKI&#44; as reflected in the RIFLE system&#44; were published in 2004&#46; This system is based on the detection of evolutive changes referred to patient basal glomerular filtration &#40;GF&#41; through changes in urine volume or based on the estimation of GF from Crs or creatinine clearance &#40;ClCr&#41;&#46; One year later&#44; in 2007&#44; the AKIN<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a> group redefined this system once it became clear &#40;initially in studies in heart surgery and posteriorly in other population groups&#41;<a class="elsevierStyleCrossRefs" href="#bib0075"><span class="elsevierStyleSup">15&#44;16</span></a> that also small Crs increments imply a poorer prognosis&#44; independently of the basal situation&#46; The AKIN system stratifies patients into three levels according to changes in diuresis or Crs increments&#44; without considering other GF estimators&#44; and incorporating absolute Crs elevations &#40;an increase of 0&#46;3<span class="elsevierStyleHsp" style=""></span>mg&#47;dl would classify a patient as AKIN 1&#44; independently of the previous basal level&#41;&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">On furthermore considering that when Crs rises to above 2<span class="elsevierStyleHsp" style=""></span>mg&#47;dl&#44; the functional kidney mass &#40;i&#46;e&#46;&#44; the &#8220;kidney reserve&#8221;&#41; has dropped to 50&#37;&#44;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">17</span></a> it is not surprising that the RIFLE and AKIN systems&#44; by detecting small Crs increments&#44; are of great interest&#44; and that the previous incidence data&#8212;mostly based on this 2<span class="elsevierStyleHsp" style=""></span>mg&#47;dl cutoff value&#8212;possibly greatly underestimated the true incidence of AKI&#46; It also must be considered that both systems &#40;RIFLE and AKIN&#41; have already been widely validated and show good correlation to mortality&#46;<a class="elsevierStyleCrossRefs" href="#bib0090"><span class="elsevierStyleSup">18&#8211;22</span></a> However&#44; despite the interest in these new defining systems&#44; to date they have shown scant penetration in Spanish ICUs&#44; since less than 40&#37; of our Units use such instruments&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Another aspect to be taken into account in assessing the detection of AKI is the GF estimator used&#46; In clinical practice&#44; the measurement of urine output is a simple method and in most cases anticipates Crs elevation&#59; as a result&#44; it is widely used for the initial detection of renal dysfunction&#44;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">23</span></a> although as a parameter it offers very poor specificity&#46; Both systems define Crs as an alternative estimator&#44; since it is easy to determine and is universally available&#46; However&#44; Crs elevation shows a delay or lag after the lowering of GF&#44; and does not exhibit a linear relationship with decreasing GF&#46; These aspects may pose an important problem for a system precisely aiming to secure the early detection of reductions in GF&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">Taking into account that kidney function in critical patients is not stable&#44; it seems reasonable that serial measurements of ClCr &#40;which can be made with short duration diuresis&#44; thereby allowing for easy reproducibility&#41;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a> are able to detect such changes earlier than Crs &#8211; though the use of this estimator is only contemplated in the RIFLE &#40;which in our opinion represents an advantage over AKIN&#41;&#46; In our experience there are discrepancies in stratifying patients with the RIFLE system according to whether it is based on Crs or ClCr&#44; in the sense that utilization of the latter parameter is more closely related to the prognosis&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">22</span></a> It is notorious that in the surveyed ICUs&#44; ClCr was the parameter most commonly used to estimate GF&#44; and it is even more surprising that 70&#37; of the Units used determinations based on 24-h urine&#8212;these data being discordant with those obtained 10 years ago in the FRAMI study&#44;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> where few Units made use of ClCr&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">Crs is the next most common estimator used in our ICUs&#44; though in fact it constitutes the most common estimator &#40;59&#37;&#41; on considering those Units that use it incorporated to equations&#46; This is not surprising&#44; since the method is simple and reproducible&#44; and very familiar in the clinical setting&#46; What is surprising is that Crs is not incorporated in either of the available and validated systems &#40;RIFLE or AKIN&#41; with the purpose of stratifying patients and of offering a tool for follow-up capable of contributing relevant clinical information &#40;this in our view being the most attractive aspect of these classification systems&#41;&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">On the other hand&#44; we see that the use of formulas remains a generalized practice despite the fact that they were specifically developed for application in chronic patients&#46; However&#44; a significant percentage of centers &#40;21&#37;&#41; apply them to estimate GF in patients with AKI&#44; even though none of them are useful in critically ill patients&#46;<a class="elsevierStyleCrossRefs" href="#bib0120"><span class="elsevierStyleSup">24&#44;25</span></a></p><p id="par0115" class="elsevierStylePara elsevierViewall">None of the Units&#44; regardless of their size&#44; have incorporated biomarkers or cystatin-C in routine use&#44; though we have evidenced that their application is being studied in some Units &#40;including our own&#41;&#44; in concrete patient groups&#46; The incorporation of these new biomarkers may give added impulse to the early detection of AKI&#44; though considering the current situation found in Spanish ICUs &#40;as reflected by our data&#41;&#44; their incorporation to the clinical setting does not appear due anytime soon&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">Of note is the observation that no intervention for the diagnosis&#44; stratification or prevention of AKI has been protocolized in the majority of our Units&#44; since less than 50&#37; of them admit the use of protocols in this sense&#46; Furthermore&#44; those protocols that do exist are particularly centered on the prevention of nephropathy referred to contrast injection&#44; and in only very sporadic cases to drug adjustment&#46; Specifically&#44; only 12&#37; of the Units have protocols which include these two very important aspects&#46; This is in stark contrast to the use of RRT&#44; since most of the Units have written protocols for applying such techniques&#46; This may be attributed to the fact that the diagnosis of AKI is well assimilated in our usual clinical practice&#44; while RRT is a relatively recent practice with which we have had to become quickly familiarized in view of the advances made in this field&#46; This has created the need to learn and reflect the practice in written protocols&#59; indeed&#44; almost 60&#37; of the Spanish Units have protocols for drug adjustment associated to the use of RRT&#44; while only 7&#37; have protocols for drug adjustment in relation to AKI&#46; In fact&#44; in relation to training&#44; over 70&#37; of the Units reported having active training programs in RRT&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">The described results of course are based on the analysis of a survey&#44; and so must be viewed with caution&#46; On the other hand&#44; and as the main weakness of this study&#44; the sample comprised a highly selected group of Units&#8212;which questions the external validity of the findings&#46; Nevertheless&#44; this bias further emphasizes the problem&#44; since the fact that the Units in the study largely participated because of their involvement and interest in AKI leads us to suspect that the results obtained in a larger study would have proven even less adequate&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">We consider it necessary to change the strategy of our approach to AKI&#44; with incorporation of the recommendations of the ADQI and AKIN conferences to our daily clinical practice&#44; since this would directly result in early detection&#46; Simply acquiring the habit of detecting patients at risk and of reflecting the fact in their case history can help improve management and reduce secondary renal damage&#44; independently of the notion that different software applications &#40;where available&#41; can draw our attention through specific alerts when kidney function is altered&#8212;as is the case in our center&#46; Undoubtedly&#44; the incorporation of written protocols for the prevention and detection of AKI&#44; and for RRT&#44; would have a positive effect upon patient safety&#8212;facilitating secondary prevention &#40;limitation of damage&#41; and avoiding classification error and iatrogenic problems &#40;&#8220;dialytrauma&#8221;&#41;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a> in RRT&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Conflicts of interest</span><p id="par0135" class="elsevierStylePara elsevierViewall">The authors declare no conflicts of interest&#46;</p></span></span>"
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            1 => "Objetivo"
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    "fechaRecibido" => "2011-08-06"
    "fechaAceptado" => "2011-10-15"
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          "palabras" => array:5 [
            0 => "Acute kidney injury"
            1 => "Renal replacement therapies"
            2 => "<span class="elsevierStyleItalic">Acute Dialysis Quality Initiative</span>"
            3 => "<span class="elsevierStyleItalic">Acute Kidney Injury Network</span>"
            4 => "Prevention"
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          "palabras" => array:5 [
            0 => "Disfunci&#243;n renal aguda"
            1 => "Depuraci&#243;n extrarrenal"
            2 => "<span class="elsevierStyleItalic">Acute Dialysis Quality Initiative</span>"
            3 => "<span class="elsevierStyleItalic">Acute Kidney Injury Network</span>"
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    "resumen" => array:2 [
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        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">To evaluate variability in the detection and prevention of acute kidney injury &#40;AKI&#41; in the intensive care unit &#40;ICU&#41;&#44; and application of the international recommendations in this field &#40;Acute Dialysis Quality Initiative &#91;ADQI&#93; and Acute Kidney Injury Network &#91;AKIN&#93;&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Design</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A prospective&#44; observational&#44; multicenter study&#46;</p> <span class="elsevierStyleSectionTitle">Setting</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">A total of 42 ICUs in 32 hospitals &#40;78&#37; in third level hospitals and 70&#46;7&#37; general units&#41; recruited for a study on the prevalence of AKI &#40;COFRADE&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Interventions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Survey&#46;</p> <span class="elsevierStyleSectionTitle">Variables</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Aspects related to AKI detection and prevention and renal replacement therapy &#40;RRT&#41; protocols&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">The method used for estimating glomerular filtration rate was serum creatinine &#40;Crs&#41; in 36&#46;6&#37;&#44; creatinine clearance in 41&#46;5&#37; and equations in 22&#37;&#59; none reported using cystatin-C&#46; Only 39&#46;1&#37; ICUs acknowledged the use of stratification systems &#40;13 RIFLE and 3 AKIN&#41;&#46;</p><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">A total of 48&#46;8&#37; ICUs had no written protocols for AKI prevention&#44; 31&#46;7&#37; reported using them only for contrast nephropathy&#44; 7&#46;3&#37; for nephrotoxic drugs and 12&#46;2&#37; for both&#46;</p><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">In contrast&#44; 63&#46;4&#37; participants had written protocols for RRT&#44; 70&#46;7&#37; had implemented a training program&#44; and 53&#46;7&#37; had some method for adjusting doses of drugs when on RRT&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">We observed an important variability regarding diagnostic criteria and prevention of AKI in Spanish ICUs&#44; the application of ADQI or AKIN recommendations still being low in our units&#46; RRT seems to generate more concern among our intensivists than AKI management&#46;</p>"
      ]
      "es" => array:2 [
        "titulo" => "Resumen"
        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Evaluar la variabilidad en la detecci&#243;n y prevenci&#243;n de la disfunci&#243;n renal aguda &#40;DRA&#41; en las unidades de cuidados intensivos &#40;UCI&#41;&#44; as&#237; como la aplicaci&#243;n de recomendaciones internacionales en este campo &#40;<span class="elsevierStyleItalic">Acute Dialysis Quality Initiative</span> &#91;ADQI&#93; y <span class="elsevierStyleItalic">Acute Kidney Injury Network</span> &#91;AKIN&#93;&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Dise&#241;o</span><p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Estudio multic&#233;ntrico prospectivo descriptivo&#46;</p> <span class="elsevierStyleSectionTitle">&#193;mbito</span><p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Un total de 42 UCI &#40;70&#44;7&#37; generales&#41; en 32 hospitales &#40;78&#37; de tercer nivel&#41;&#44; participantes en un estudio de prevalencia de DRA &#40;COFRADE&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Intervenciones</span><p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Encuesta&#46;</p> <span class="elsevierStyleSectionTitle">Variables de inter&#233;s</span><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">M&#233;todos de detecci&#243;n y prevenci&#243;n de DRA y existencia de protocolos para depuraci&#243;n extrarrenal &#40;TDE&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Para la estimaci&#243;n del filtrado glomerular se usa la creatinina s&#233;rica en el 36&#44;6&#37;&#44; el aclaramiento de creatinina en el 41&#44;5&#37;&#44; ecuaciones basadas en una muestra de creatinina s&#233;rica en 22&#37; y creatinina s&#233;rica aislada en el resto&#59; en ning&#250;n caso se utiliza la cistatina-C&#46;</p><p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">Solo el 39&#44;1&#37; de las UCI aplica sistemas de estratificaci&#243;n &#40;13 RIFLE y 3 AKI&#41;&#46; El 48&#44;8&#37; no cuenta con protocolos de prevenci&#243;n de DRA&#44; el 31&#44;7&#37; los tiene para nefropat&#237;a por contraste&#44; el 7&#44;3&#37; para manejo de nefrot&#243;xicos y el 12&#44;2&#37; para ambos&#46;</p><p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">Por contra&#44; el 63&#44;4&#37; de las unidades cuenta con protocolos de manejo de TDE&#44; el 70&#44;7&#37; aplica programas de formaci&#243;n continuada para estas y el 53&#44;7&#37; cuenta con protocolos de ajuste de dosis de f&#225;rmacos en estos casos&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">Existe amplia variabilidad en cuanto al m&#233;todo de detecci&#243;n de la DRA en nuestras unidades&#44; con escasa aplicaci&#243;n de sistemas de estratificaci&#243;n de da&#241;o&#46; El manejo de las TDE despierta m&#225;s inquietud que la prevenci&#243;n o el diagn&#243;stico de la DRA&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara">Please cite this article as&#58; Herrera-Guti&#233;rrez ME&#44; et al&#46; Variabilidad en los criterios de definici&#243;n y m&#233;todos de detecci&#243;n de la disfunci&#243;n renal en las unidades de cuidados intensivos &#191;se aplican los consensos internacionales para el diagn&#243;stico de la disfunci&#243;n renal&#63; Med Intensiva&#46; 2012&#59;36&#58;264&#8211;9&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara">This study has the scientific support of the <span class="elsevierStyleGrantSponsor">SEMICYUC</span>&#46;</p>"
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            "apendice" => "<p id="par0140" class="elsevierStylePara elsevierViewall">Investigators of the COFRADE study working group&#58; <span class="elsevierStyleBold">Coordination</span>&#58; Herrera Guti&#233;rrez ME&#44; Seller P&#233;rez G&#44; S&#225;nchez-Izquierdo Riera JA&#44; Maynar Moliner J&#46; <span class="elsevierStyleBold">Investigators</span>&#58; Hospital Cl&#237;nic Barcelona&#58; <span class="elsevierStyleItalic">Nephrology</span>&#58; P&#233;rez N&#59; <span class="elsevierStyleItalic">Hepatology</span>&#58; Acevedo J&#44; Mas A&#44; Castro M&#59; <span class="elsevierStyleItalic">General ICU</span>&#58; Nicolas JM&#59; <span class="elsevierStyleItalic">Surgical ICU</span>&#58; Zavala E&#44; Adalia R&#44; Tercero FJ&#59; <span class="elsevierStyleItalic">Nephrological ICU</span>&#58; Poch E&#44; Serra N&#59; <span class="elsevierStyleItalic">Cardiological ICU</span>&#58; Bosch Genover X&#59; <span class="elsevierStyleItalic">Respiratory ICU</span>&#58; Badia JR&#59; <span class="elsevierStyleItalic">Cardiac surgery ICU</span>&#58; Cartana R&#59; <span class="elsevierStyleItalic">Anesthesia and resuscitation</span>&#58; Fontanals J&#46; Hospital Cl&#237;nico San Carlos Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ortu&#241;o And&#233;riz F&#46; Hospital Costa del Sol M&#225;laga&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Fern&#225;ndez Garc&#237;a MI&#46; Hospital de Alcorc&#243;n Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; N&#250;&#241;ez Reiz D&#46; Hospital de Cruces Bilbao&#58; <span class="elsevierStyleItalic">Anesthesia and resuscitation</span>&#58; Lekerika N&#59; <span class="elsevierStyleItalic">ICU</span>&#58; S&#225;nchez A&#46; Hospital de Guadalajara Guadalajara&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Benito Puncel C&#44; Borrallo JM&#46; Hospital de la Santa Creu i San Pau Barcelona&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Roglan Piqueras A&#44; Rodr&#237;guez L&#243;pez M&#46; Hospital del Norte Madr&#237;d&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Gonz&#225;lez Arenas MP&#46; Hospital del Sureste Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ochoa Calero M&#44; Albert de la Cruz P&#44; Cruz Tejedor M&#46; Hospital del Tajo Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ballesteros Ortega D&#46; Hospital Fundaci&#243;n Jim&#233;nez D&#237;az Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Alcal&#225; Llorente MA&#44; P&#233;rez Calvo C&#44; Oeding Angulo G&#46; Hospital General Universitario Asociado Castell&#243;n&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Mas Font S&#44; Gonz&#225;lez Luis R&#44; Ferrandiz Sell&#233;s A&#46; Hospital General Yag&#252;e Burgos&#58; <span class="elsevierStyleItalic">ICU</span>&#58; L&#243;pez Pueyo MJ&#44; Llata Rodr&#237;guez L&#44; Perea Rodr&#237;guez ME&#46; Hospital Germans Trias i Pujol Badalona&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Tomasa Irriguible TM&#46; Hospital Ram&#243;n y Cajal Madrid&#58; <span class="elsevierStyleItalic">Anesthesia and resuscitation</span>&#58; Candela-Toha A&#59; <span class="elsevierStyleItalic">ICU</span>&#58; Li&#233;tor Villajos JA&#46; Hospital Severo Ochoa Madr&#237;d&#58; <span class="elsevierStyleItalic">ICU</span>&#58; L&#243;pez Mart&#237;nez J&#44; Chamorro Borraz N&#44; Su&#225;rez Saiz J&#46; Hospital Torrec&#225;rdenas Almer&#237;a&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ramos Cuadra JA&#44; Calder&#243;n Rodr&#237;guez A&#44; Rodr&#237;guez Casta&#241;o R&#46; Hospital Universitario 12 de Octubre Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Flordelis Lasierra JL&#44; Mohedano G&#243;mez A&#44; P&#233;rez Vela JL&#44; Terceros L&#46; Hospital Universitario Carlos Haya M&#225;laga&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Lozano S&#225;ez R&#44; Olalla Garc&#237;a R&#46; Hospital Universitario de Canarias Tenerife&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Lorenzo de la Pe&#241;a L&#44; P&#233;rez Mart&#237;nez N&#46; Hospital Universitario Doctor Peset Valencia&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Zaragoza R&#46;&#44; Casanoves Laparra E&#44; Montoro Lozano Y&#46; Hospital Universitario Infanta Cristina Badajoz&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Robles Marcos M&#44; Almaraz Velarde R&#44; Trasmonte Mart&#237;nez MV&#46; Hospital Universitario La Paz Madrid&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Garc&#237;a-de-Lorenzo A&#44; S&#225;nchez M&#44; Perales E&#46; Hospital Universitario Puerta del Mar C&#225;diz&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Sierra Camerino R&#44; S&#225;nchez Rodr&#237;guez AC&#46; Hospital Vega Baja Orihuela&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Gim&#233;nez-Esparza Vich C&#44; P&#233;rez Mart&#237;nez D&#44; Portillo Requena C&#46; Hospital Universitario Virgen de la Arrixaca Murcia&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Ros Mart&#237;nez J&#44; Llamas L&#225;zaro C&#46; Hospital Virgen de la Victoria M&#225;laga&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Daga Ruiz D&#44; Vidal Hern&#225;ndez Rodr&#237;guez J&#46; Hospital Virgen de las Nieves Granada&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Guerrero L&#243;pez F&#46; Hospital Universitario Virgen de Valme Sevilla&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Herrera Rojas D&#44; &#218;beda Iglesias A&#44; Contreras del Pino T&#46; Hospital Virgen del Roc&#237;o Sevilla&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Hinojosa P&#233;rez R&#46; Hospital Universitario Virgen Macarena Sevilla&#58; <span class="elsevierStyleItalic">ICU</span>&#58; Arenzana Seisdedos A&#44; Ib&#225;&#241;ez Cuadros S&#46; Hospital Xeral Lugo&#58; <span class="elsevierStyleItalic">ICU</span>&#58; &#193;lvarez Montero L&#44; Nespereira Jato V&#44; Saornil Agote O&#46;</p>"
            "etiqueta" => "Appendix 1"
            "identificador" => "sec0030"
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                      "titulo" => "Acute renal failure in critically ill patients&#58; a multinacional&#44; multicenter study"
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                            0 => "S&#46; Uchino"
                            1 => "J&#46; Kellum"
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ISSN: 21735727
Original language: English
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