Letter to the Editor
We must evaluate the previous kidney damage in the acute kidney failure due to COVID-19
Debemos evaluar el daño renal previo en el fracaso renal agudo por COVID-19
Blanca Tarragón, María Valdenebro, Maria Luisa Serrano, Jose Portoles
Corresponding author
Servicio de Nefrología, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, Spain
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This implies a negative selection bias for the most critical patients who required referral to the nephrologist due to the severity of their condition, the need for dialysis or additional complications. Under no circumstances can we take our series of 41 patients as representative of AKI in the COVID-19 patient in general. In fact, our analysis approach is fundamentally descriptive. Our focus was on highlighting the tremendous variability of causes, clinical presentations and outcomes we have collected and which go beyond direct kidney involvement due to the SARS-CoV-2 infection or resulting from the cytokine storm. We wanted to give a perspective from the point of view of the nephrologist, providing clarity at a time when there were large gaps in our knowledge. If you remember, the Ministry's COVID-19 report of April 2020 did not acknowledge chronic kidney disease (CKD) as a risk factor, and nor did it provide published evidence that AKI was a problem associated with COVID-19<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>.</p><p id="par0015" class="elsevierStylePara elsevierViewall">As for the differential diagnosis between AKI and CKD, we specified in the methods section that the KDIGO criteria were used to diagnose AKI. It is then clarified in the section on baseline characteristics, within the results, that 36.6% of our population had underlying CKD. In our previous analysis of 1.600 patients admitted to the hospital as a whole during the first wave, the association of CKD and AKI was specifically analysed separately in the prognosis of the patients<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a>. In the same issue, editorial comments precisely stress this point, the difficulty of separating pure AKI from the deterioration of pre-existing CKD<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a>.</p></span>" "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2021-06-15" "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0005" "bibliografiaReferencia" => array:5 [ 0 => array:3 [ "identificador" => "bib0005" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Acute kidney failure in patients admitted due to COVID-19" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:6 [ 0 => "B. Tarragón" 1 => "M. Valdenebro" 2 => "M.L. Serrano" 3 => "A. Maroto" 4 => "M.R. Llópez-Carratalá" 5 => "A. Ramos" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1016/j.nefro.2020.08.005" "Revista" => array:6 [ "tituloSerie" => "Nefrologia" "fecha" => "2021" "volumen" => "41" "paginaInicial" => "34" "paginaFinal" => "40" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/36165359" "web" => "Medline" ] ] ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib0010" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Apreciación del fracaso renal agudo en pacientes con por COVID-19" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => "A. Rebaza-Mateo" 1 => "F. Yarasca-Moreno" 2 => "L. 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Portolés" 1 => "M. Marques" 2 => "P.M. López Sánchez" 3 => "M. de Valdenebro" 4 => "E. Múñez" 5 => "M.L. Serrano" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1093/ndt/gfaa189" "Revista" => array:6 [ "tituloSerie" => "Nephrol Dial Transplant" "fecha" => "2020" "volumen" => "35" "paginaInicial" => "1353" "paginaFinal" => "1361" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/32871592" "web" => "Medline" ] ] ] ] ] ] ] ] 4 => array:3 [ "identificador" => "bib0025" "etiqueta" => "5" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "The clinical characteristics of coronavirus-associated nephropathy" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => "B. Meijers" 1 => "L.B. Hilbrands" ] ] ] ] ] "host" => array:1 [ 0 => array:2 [ "doi" => "10.1093/ndt/gfaa197" "Revista" => array:6 [ "tituloSerie" => "Nephrol Dial Transplant" "fecha" => "2020" "volumen" => "35" "paginaInicial" => "1279" "paginaFinal" => "1281" "link" => array:1 [ 0 => array:2 [ "url" => "https://www.ncbi.nlm.nih.gov/pubmed/32871591" "web" => "Medline" ] ] ] ] ] ] ] ] ] ] ] ] ] "idiomaDefecto" => "en" "url" => "/20132514/0000004200000005/v2_202410291251/S201325142300010X/v2_202410291251/en/main.assets" "Apartado" => array:4 [ "identificador" => "35436" "tipo" => "SECCION" "en" => array:2 [ "titulo" => "Letters to the Editor" "idiomaDefecto" => true ] "idiomaDefecto" => "en" ] "PDF" => "https://static.elsevier.es/multimedia/20132514/0000004200000005/v2_202410291251/S201325142300010X/v2_202410291251/en/main.pdf?idApp=UINPBA000064&text.app=https://revistanefrologia.com/" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S201325142300010X?idApp=UINPBA000064" ]
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