The impact of COVID-19 on kidney transplant activities in Brazil: a descriptive study

ABSTRACT BACKGROUND: The coronavirus 19 (COVID-19) pandemic has reached services, systems, and world society. Despite its certified efficiency, the Brazilian National Transplant System is not exempt from the side effects of COVID-19. OBJECTIVE: To compare kidney transplantation activity registered in Brazil between the pandemic (2020) and pre-pandemic (2019) periods. DESIGN AND SETTING: A descriptive study was conducted in March 2021. The annual reports of the Brazilian Transplantation Registry for 2019 and 2020 were included in this study. METHODS: We conducted a descriptive study of kidney transplant activity in Brazil in 2019 and 2020. RESULTS: A 23.9% decrease in kidney transplants per million population was observed during the pandemic period (22.9 in 2020 versus 30.1 in 2019). Kidney transplants with a living donor (-58.8%) and in the North Region (-79.5%) experienced the greatest declines. The pandemic waiting list increased by 6.8%, and deaths during the waiting period increased by 36.8%. The number of patients on the waiting list and transplant teams decreased by 31.3% and 9.5%, respectively. CONCLUSION: The COVID-19 pandemic drastically affected Brazil and had a significant negative impact on KT activities in the country.

The impact of COVID-19 on kidney transplant activities in Brazil: a descriptive study.

BACKGROUND: The coronavirus 19 (COVID-19) pandemic has reached services, systems, and world society. Despite its certified efficiency, the Brazilian National Transplant System is not exempt from the side effects of COVID-19. OBJECTIVE: To compare kidney transplantation activity registered in Brazil between the pandemic (2020) and pre-pandemic (2019) periods. DESIGN AND SETTING: A descriptive study was conducted in March 2021. The annual reports of the Brazilian Transplantation Registry for 2019 and 2020 were included in this study. METHODS: We conducted a descriptive study of kidney transplant activity in Brazil in 2019 and 2020. RESULTS: A 23.9% decrease in kidney transplants per million population was observed during the pandemic period (22.9 in 2020 versus 30.1 in 2019). Kidney transplants with a living donor (-58.8%) and in the North Region (-79.5%) experienced the greatest declines. The pandemic waiting list increased by 6.8%, and deaths during the waiting period increased by 36.8%. The number of patients on the waiting list and transplant teams decreased by 31.3% and 9.5%, respectively. CONCLUSION: The COVID-19 pandemic drastically affected Brazil and had a significant negative impact on KT activities in the country.

Occurrence of acute kidney injury in adult patients hospitalized with COVID-19: A systematic review and meta-analysis.

BACKGROUND AND AIM: The knowledge about the acute kidney injury (AKI) incidence in patients with coronavirus disease 2019 (COVID-19) can help health teams to carry out a targeted care plan. This study aimed to determine the AKI incidence in patients hospitalized with COVID-19. METHODS: The electronic search covered research published until June 20, 2020, and included five databases, PubMed, Embase, Web of Science, Scopus, and Lilacs (Latin American and Caribbean Health Sciences Library). Eligible studies were those including data from AKI occurrence in adult patients hospitalized with COVID-19. The primary outcome was AKI incidence, and the secondary outcome assessed was the AKI mortality. Additionally, the estimated incidence of renal replacement therapy (RRT) need also was verified. Using a standardized form prepared in Microsoft Excel, data were extracted by two independents authors, regarding the description of studies, characteristics of patients and clinical data on the AKI occurrence. RESULTS: We included 30 studies in this systematic review, of which 28 were included in the meta-analysis. Data were assessed from 18.043 adult patients with COVID-19. The AKI estimate incidence overall and at the ICU was 9.2% (4.6-13.9) and 32.6% (8.5-56.6), respectively. AKI estimate incidence in the elderly patients and those with acute respiratory disease syndrome was 22.9% (-4.0-49.7) and 4.3% (1.8-6.8), respectively. Patients with secondary infection, AKI estimate incidence was 31.6% (12.3-51.0). The estimate incidence of patients that required RRT was 3.2% (1.1-5.4) and estimate AKI mortality was 50.4% (17.0-83.9). CONCLUSION: The occurrence of AKI is frequent among adult patients hospitalized with COVID-19, and affects on average, up to 13.9% of these patients. It is believed that AKI occurs early and in parallel with lung injury.

Occurrence of acute kidney injury in adult patients hospitalized with COVID-19: A systematic review and meta-analysis / Ocurrencia de lesión renal aguda en pacientes adultos hospitalizados con COVID-19: revisión sistemática y metanálisis

Background and aimThe knowledge about the acute kidney injury (AKI) incidence in patients with coronavirus disease 2019 (COVID-19) can help health teams to carry out a targeted care plan. This study aimed to determine the AKI incidence in patients hospitalized with COVID-19.MethodsThe electronic search covered research published until June 20, 2020, and included five databases, PubMed, Embase, Web of Science, Scopus, and Lilacs (Latin American and Caribbean Health Sciences Library). Eligible studies were those including data from AKI occurrence in adult patients hospitalized with COVID-19. The primary outcome was AKI incidence, and the secondary outcome assessed was the AKI mortality. Additionally, the estimated incidence of renal replacement therapy (RRT) need also was verified. Using a standardized form prepared in Microsoft Excel, data were extracted by two independents authors, regarding the description of studies, characteristics of patients and clinical data on the AKI occurrence.ResultsWe included 30 studies in this systematic review, of which 28 were included in the meta-analysis. Data were assessed from 18.043 adult patients with COVID-19. The AKI estimate incidence overall and at the ICU was 9.2% (4.6–13.9) and 32.6% (8.5–56.6), respectively. AKI estimate incidence in the elderly patients and those with acute respiratory disease syndrome was 22.9% (−4.0–49.7) and 4.3% (1.8–6.8), respectively. Patients with secondary infection, AKI estimate incidence was 31.6% (12.3–51.0). The estimate incidence of patients that required RRT was 3.2% (1.1–5.4) and estimate AKI mortality was 50.4% (17.0–83.9).ConclusionThe occurrence of AKI is frequent among adult patients hospitalized with COVID-19, and affects on average, up to 13.9% of these patients. It is believed that AKI occurs early and in parallel with lung injury. (AU)

Antecedentes y objetivoEl conocimiento de la incidencia de lesión renal aguda (LRA) en pacientes con enfermedad por coronavirus 2019 (COVID-19) puede ayudar a los equipos de atención médica a llevar a cabo un plan de atención específico. Este estudio tuvo como objetivo determinar la incidencia de LRA en pacientes hospitalizados con COVID-19.MétodosLa búsqueda electrónica cubrió la investigación publicada hasta el 20 de junio del 2020 e incluyó 5 bases de datos: PubMed, Embase, Web of Science, Scopus y Lilacs (Biblioteca de Ciencias de la Salud de América Latina y el Caribe). Los estudios elegibles fueron aquellos que incluyeron datos sobre la aparición de LRA en pacientes adultos hospitalizados con COVID-19. El resultado primario fue la incidencia de LRA y el resultado secundario evaluado fue la mortalidad por LRA. Además, también se verificó la incidencia estimada de necesidad de terapia de reemplazo renal (TRR). Mediante un formulario estandarizado elaborado en Microsoft Excel, los datos fueron extraídos por 2 autores independientes, haciendo referencia a la descripción de los estudios, las características de los pacientes y los datos clínicos sobre la ocurrencia de LRA.ResultadosEn esta revisión sistemática se incluyeron 30 estudios, de los cuales 28 se incluyeron en el metaanálisis. Se evaluaron los datos de 18.043 pacientes adultos con COVID-19. La incidencia estimada de LRA en general y en la UCI fue del 9,2% (4,6-13,9) y del 32,6% (8,5-56,6), respectivamente. La incidencia estimada de LRA en pacientes ancianos y pacientes con síndrome de enfermedad respiratoria aguda fue del 22,9% (–4,0-49,7) y del 4,3% (1,8-6,8), respectivamente. En pacientes con infección secundaria, la incidencia estimada de LRA fue del 31,6% (12,3-51,0). La incidencia estimada de pacientes que requirieron TRR fue del 3,2% (1,1-5,4) y la mortalidad estimada por LRA fue del 50,4% (17,0-83,9). ... (AU)

Risk factors and prediction of acute kidney injury after liver transplantation: Logistic regression and artificial neural network approaches.

BACKGROUND: Acute kidney injury (AKI) has serious consequences on the prognosis of patients undergoing liver transplantation. Recently, artificial neural network (ANN) was reported to have better predictive ability than the classical logistic regression (LR) for this postoperative outcome. AIM: To identify the risk factors of AKI after deceased-donor liver transplantation (DDLT) and compare the prediction performance of ANN with that of LR for this complication. METHODS: Adult patients with no evidence of end-stage kidney dysfunction (KD) who underwent the first DDLT according to model for end-stage liver disease (MELD) score allocation system was evaluated. AKI was defined according to the International Club of Ascites criteria, and potential predictors of postoperative AKI were identified by LR. The prediction performance of both ANN and LR was tested. RESULTS: The incidence of AKI was 60.6% (n = 88/145) and the following predictors were identified by LR: MELD score > 25 (odds ratio [OR] = 1.999), preoperative kidney dysfunction (OR = 1.279), extended criteria donors (OR = 1.191), intraoperative arterial hypotension (OR = 1.935), intraoperative massive blood transfusion (MBT) (OR = 1.830), and postoperative serum lactate (SL) (OR = 2.001). The area under the receiver-operating characteristic curve was best for ANN (0.81, 95% confidence interval [CI]: 0.75-0.83) than for LR (0.71, 95%CI: 0.67-0.76). The root-mean-square error and mean absolute error in the ANN model were 0.47 and 0.38, respectively. CONCLUSION: The severity of liver disease, pre-existing kidney dysfunction, marginal grafts, hemodynamic instability, MBT, and SL are predictors of postoperative AKI, and ANN has better prediction performance than LR in this scenario.

Occurrence of acute kidney injury in adult patients hospitalized with COVID-19: A systematic review and meta-analysis.

Background and aim: The knowledge about the acute kidney injury (AKI) incidence in patients with coronavirus disease 2019 (COVID-19) can help health teams to carry out a targeted care plan. This study aimed to determine the AKI incidence in patients hospitalized with COVID-19. Methods: The electronic search covered research published until June 20, 2020, and included five databases, PubMed, Embase, Web of Science, Scopus, and Lilacs (Latin American and Caribbean Health Sciences Library). Eligible studies were those including data from AKI occurrence in adult patients hospitalized with COVID-19. The primary outcome was AKI incidence, and the secondary outcome assessed was the AKI mortality. Additionally, the estimated incidence of renal replacement therapy (RRT) need also was verified. Using a standardized form prepared in Microsoft Excel, data were extracted by two independents authors, regarding the description of studies, characteristics of patients and clinical data on the AKI occurrence. Results: We included 30 studies in this systematic review, of which 28 were included in the meta-analysis. Data were assessed from 18.043 adult patients with COVID-19. The AKI estimate incidence overall and at the ICU was 9.2% (4.6-13.9) and 32.6% (8.5-56.6), respectively. AKI estimate incidence in the elderly patients and those with acute respiratory disease syndrome was 22.9% (-4.0-49.7) and 4.3% (1.8-6.8), respectively. Patients with secondary infection, AKI estimate incidence was 31.6% (12.3-51.0). The estimate incidence of patients that required RRT was 3.2% (1.1-5.4) and estimate AKI mortality was 50.4% (17.0-83.9). Conclusion: The occurrence of AKI is frequent among adult patients hospitalized with COVID-19, and affects on average, up to 13.9% of these patients. It is believed that AKI occurs early and in parallel with lung injury.

Antecedentes y objetivo: El conocimiento de la incidencia de lesión renal aguda (LRA) en pacientes con enfermedad por coronavirus 2019 (COVID-19) puede ayudar a los equipos de atención médica a llevar a cabo un plan de atención específico. Este estudio tuvo como objetivo determinar la incidencia de LRA en pacientes hospitalizados con COVID-19. Métodos: La búsqueda electrónica cubrió la investigación publicada hasta el 20 de junio del 2020 e incluyó 5 bases de datos: PubMed, Embase, Web of Science, Scopus y Lilacs (Biblioteca de Ciencias de la Salud de América Latina y el Caribe). Los estudios elegibles fueron aquellos que incluyeron datos sobre la aparición de LRA en pacientes adultos hospitalizados con COVID-19. El resultado primario fue la incidencia de LRA y el resultado secundario evaluado fue la mortalidad por LRA. Además, también se verificó la incidencia estimada de necesidad de terapia de reemplazo renal (TRR). Mediante un formulario estandarizado elaborado en Microsoft Excel, los datos fueron extraídos por 2 autores independientes, haciendo referencia a la descripción de los estudios, las características de los pacientes y los datos clínicos sobre la ocurrencia de LRA. Resultados: En esta revisión sistemática se incluyeron 30 estudios, de los cuales 28 se incluyeron en el metaanálisis. Se evaluaron los datos de 18.043 pacientes adultos con COVID-19. La incidencia estimada de LRA en general y en la UCI fue del 9,2% (4,6-13,9) y del 32,6% (8,5-56,6), respectivamente. La incidencia estimada de LRA en pacientes ancianos y pacientes con síndrome de enfermedad respiratoria aguda fue del 22,9% (­4,0-49,7) y del 4,3% (1,8-6,8), respectivamente. En pacientes con infección secundaria, la incidencia estimada de LRA fue del 31,6% (12,3-51,0). La incidencia estimada de pacientes que requirieron TRR fue del 3,2% (1,1-5,4) y la mortalidad estimada por LRA fue del 50,4% (17,0-83,9). Conclusión: La ocurrencia de LRA es frecuente en pacientes adultos hospitalizados con COVID-19 y afecta, en promedio, hasta al 13,9% de estos pacientes. Se cree que la LRA ocurre temprano y en paralelo con la lesión pulmonar.

Principais distúrbios metabólicos em adolescentes portadores de nefrolitíase / Main metabolic disorders in adolescents with nephrolithiasis

Introdução: Os cálculos renais compreendem uma das mais comuns patologias do trato urinário e têm apresentado maior incidência em adolescentes nos últimos anos. Objetivos: Identificar os distúrbios metabólicos causadores de cálculo renal mais prevalentes em adolescentes. Métodos: Foram analisados os prontuários de 135 indivíduos portadores de nefrolitíase, com idade entre 12 e 18 anos, de ambos os sexos. Na análise laboratorial, incluiu-se: duas amostras de urina de 24 horas, contendo cálcio, citrato, oxalato e ácido úrico; uma amostra sanguínea, contendo creatinina, paratormônio, ácido úrico e cálcio; pH urinário após 12 horas de restrição hídrica e jejum; urocultura e cistinúria qualitativa. Resultados: 88 pacientes apresentaram hipercaIciúria (65,2%), 42 apresentaram hipocitratúria (31,1%) e 29 hiperuricosúria (21,5%). As demais alterações observadas foram: volume urinário reduzido (14,8%), infecções do trato urinário (9,6%), hiperoxalúria (5,2%), hiperparatireoidismo (1,5%) e acidose tubular renal (1,5%). Os distúrbios metabólicos mais frequentemente observados nos adolescentes portadores de cálculo renal foram hipercalciúria, hipocitratúria e hiperuricosúria

Introduction: Kidney stones are one of the most common pathologies of the urinary tract and have had a higher incidence in adolescents in recent years. Objectives: To identify the most prevalent metabolic disorders that cause kidney stones in adolescents. Methods: The medical records of 135 individuals with nephrolithiasis, aged between 12 and 18 years, of both sexes, were analyzed. The laboratory analysis included: two 24-hour urine samples containing calcium, citrate, oxalate and uric acid; a blood sample, containing creatinine, parathyroid hormone, uric acid, and calcium; urinary pH after 12 hours of fluid restriction and fasting; uroculture and qualitative cystinuria. Results: 88 patients had hyperuricosuria (65.2%), 42 had hypocitraturia (31.1%) and 29 had hyperuricosuria (21.5%). The other changes observed were: reduced urinary volume (14.8%), urinary tract infections (9.6%), hyperoxaluria (5.2%), hyperparathyroidism (1.5%) and renal tubular acidosis (1.5 %). Conclusions: The metabolic disorders most frequently observed in adolescents with kidney stones were hypercalciuria, hypocitraturia and hyperuricosuria.

Complicações intradialíticas em pacientes com injúria renal aguda / Complicaciones intradialíticas en pacientes con insuficiencia renal aguda / Intradialytic complications in patients with acute kidney injury

Resumo Objetivo Identificar a prevalência de complicações intradialíticas em pacientes com injúria renal aguda (IRA) na unidade de terapia intensiva (UTI) e seus fatores associados; verificar quais foram as condutas profissionais imediatas adotadas pela equipe. Métodos Estudo retrospectivo, com abordagem quantitativa, realizado na UTI de um hospital universitário e público, localizado na região sul do Brasil. Foram incluídos neste estudo todos os pacientes internados na UTI com diagnóstico médico de IRA dialítica entre janeiro de 2011 e dezembro de 2016. Realizou-se coleta de dados contidos em prontuários. Considerou-se como estatisticamente significativo p-valor < 0,05. Resultados Foram incluídos 76 pacientes, sendo a maioria com idade entre 41 e 65 anos (n= 44; 57,9%). Todos realizaram hemodiálise intermitente. Do total de pacientes, 71 (93,4%) apresentaram complicações durante a hemodiálise, sendo hipotensão intradialítica a complicação mais prevalente, acometendo 51 (71,8%) pacientes. A conduta profissional imediata mais frequente para a referida complicação foi instalação e/ou controle da infusão do medicamento vasoativo (100% dos casos). Idade, ventilação mecânica, IRA relacionada à sepse, número e tempo de duração (horas) das sessões dialíticas, bem como o momento de início da diálise foram significativamente associados à frequência das complicações intradialíticas. Conclusão Os pacientes apresentaram alta prevalência de complicações intradialíticas, sendo que as condutas profissionais imediatas mais frequentes objetivaram reverter hipotensão intradialítica e foram realizadas majoritariamente pela equipe de enfermagem. Os fatores associados às complicações estiveram relacionados à gravidade dos pacientes no início da diálise.

Resumen Objetivo Identificar la prevalencia de complicaciones intradialíticas en pacientes con insuficiencia renal aguda (IRA) en la unidad de cuidados intensivos (UCI) y sus factores asociados; verificar qué conductas profesionales inmediatas fueron adoptadas por el equipo. Métodos Estudio retrospectivo, con abordaje cuantitativo, realizado en la UCI de un hospital universitario y público, ubicado en la región sur de Brasil. Se incluyeron en este estudio todos los pacientes ingresados a la UCI con diagnóstico médico de IRA dialítica entre enero de 2011 y diciembre de 2016. Se realizó la recopilación de datos de los prontuarios. Considerados estadísticamente significante p-valor < 0,05. Resultados Se incluyeron 76 pacientes, en su mayoría con edades entre 41 y 65 años (n= 44; 57,9 %). Todos realizaron hemodiálisis intermitente. Del total de pacientes, 71 (93,4 %) presentaron complicaciones durante la hemodiálisis, con hipotensión intradialítica como la complicación más prevalente, acometiendo a 51 (71,8 %) pacientes. La conducta profesional inmediata más frecuente para la referida complicación fue la instalación o el control de la infusión del medicamento vasoactivo (100 % de los casos). Edad, ventilación mecánica, IRA relacionada a la sepsis, número y tiempo de duración (horas) de las sesiones dialíticas, así como el momento de inicio de la diálisis estuvieron significativamente asociados con la frecuencia de las complicaciones intradialíticas. Conclusión Los pacientes presentaron alta prevalencia de complicaciones intradialíticas y las conductas profesionales inmediatas más frecuentes tuvieron el objetivo de revertir la hipotensión intradialítica y se realizaron mayoritariamente por el equipo de enfermería. Los factores asociados a las complicaciones se relacionaron con la gravedad de los pacientes al inicio de la diálisis.

Abstract Objective To identify the prevalence of intradialytic complications in patients with acute kidney injury (AKI) in an Intensive Care Unit (ICU) and their associated factors and verify what were the immediate professional behaviors adopted by the team. Methods This is a quantitative retrospective study, carried out in the ICU of a university and public hospital, located in southern Brazil. All patients admitted to an ICU with a medical diagnosis of dialysis AKI between January 2011 and December 2016 were included in this study. Data were collected from medical records. A statistical difference with a p-value < 0.05 was considered significant. Results A total of 76 patients were included, the majority aged between 41 and 65 years (n=44; 57.9%). All underwent intermittent hemodialysis. Of the total number of patients, 71 (93.4%) had complications during hemodialysis, with intradialytic hypotension being the most prevalent complication, affecting 51 (71.8%) patients. The most frequent immediate professional conduct for this complication was installation and/or control of vasoactive drug infusion (100% of cases). Age, mechanical ventilation, sepsis-related AKI, number and duration (hours) of dialysis sessions, as well as the time of starting dialysis were significantly associated with the frequency of intradialytic complications. Conclusion Patients had a high prevalence of intradialytic complications, and the most frequent immediate professional procedures aimed at reversing intradialytic hypotension and were performed mainly by the nursing team. Factors associated with complications were related to the severity of patients at the beginning of dialysis.

Non-recovery of renal function is a strong independent risk factor associated with mortality in AKI patients / A não recuperação da função renal é um forte fator de risco independente associado à mortalidade em pacientes com LRA

ABSTRACT Introduction: Acute kidney injury (AKI) is a recurrent complication in the intensive care unit (ICU) and is associated with negative outcomes. Objective: To investigate factors associated with mortality in critically ill AKI patients in a South Brazilian ICU. Methods: The study was observational retrospective involving AKI patients admitted to the ICU between January 2011 and December 2016 of at least 18 years old upon admission and who remained in the ICU at least 48 hours. Comparisons between selected characteristics of survivor and non-survivor groups were done using univariate analysis; multivariate logistic regression was applied to determine factors associated with patient mortality. Results: Of 838 eligible patients, 613 participated in the study. Men represented the majority (61.2%) of the patients, the median age was 53 years, and the global mortality rate was 39.6% (n= 243). Non-recovery of renal function after AKI (OR= 92.7 [38.43 - 223.62]; p <0.001), major surgery-associated AKI diagnosis (OR= 16.22 [3.49 - 75.38]; p <0.001), and the use of vasoactive drugs during the ICU stay (OR = 11.49 [2.46 - 53.70]; p <0.002) were the main factors independently associated with patient mortality. Conclusion: The mortality rate observed in this study was similar to that verified in other centers. Non-recovery of renal function was the variable most strongly associated with patient mortality, suggesting that the prevention of factors that aggravate or maintain the AKI episode should be actively identified and mitigated, possibly constituting an important strategy to reduce mortality in AKI patients.

RESUMO Introdução: A lesão renal aguda (LRA) é uma complicação recorrente na unidade de terapia intensiva (UTI), e está associada a desfechos desfavoráveis. Objetivo: Investigar fatores associados à mortalidade em pacientes com LRA, criticamente enfermos em uma UTI do Sul do Brasil. Métodos: O estudo foi retrospectivo observacional, envolvendo pacientes com LRA internados na UTI entre janeiro de 2011 e dezembro de 2016, com pelo menos 18 anos de idade na admissão e que permaneceram na UTI por pelo menos 48 horas. Comparações entre características selecionadas de grupos sobreviventes e não sobreviventes foram feitas usando análise univariada; regressão logística multivariada foi aplicada para determinar fatores associados à mortalidade dos pacientes. Resultados: Dos 838 pacientes elegíveis, 613 participaram do estudo. Os homens representaram a maioria (61,2%) dos pacientes, a idade média foi de 53 anos e a taxa de mortalidade global foi de 39,6% (n = 243). Não recuperação da função renal após LRA (OR = 92,7 [38,43 - 223,62]; p <0,001), diagnóstico de LRA associado à cirurgia (OR = 16,22 [3,49 - 75,38]; p <0,001) e uso de drogas vasoativas durante a internação na UTI (OR = 11,49 [2,46 - 53,70]; p <0,002) foram os principais fatores independentemente associados à mortalidade dos pacientes. Conclusão: A taxa de mortalidade observada neste estudo foi semelhante à verificada em outros centros. A não recuperação da função renal foi a variável mais fortemente associada à mortalidade dos pacientes, sugerindo que a prevenção de fatores que agravam ou mantêm o episódio de LRA deve ser ativamente buscada e incentivada, possivelmente constituindo uma estratégia importante para reduzir a mortalidade em pacientes com LRA.

Non-recovery of renal function is a strong independent risk factor associated with mortality in AKI patients.

INTRODUCTION: Acute kidney injury (AKI) is a recurrent complication in the intensive care unit (ICU) and is associated with negative outcomes. OBJECTIVE: To investigate factors associated with mortality in critically ill AKI patients in a South Brazilian ICU. METHODS: The study was observational retrospective involving AKI patients admitted to the ICU between January 2011 and December 2016 of at least 18 years old upon admission and who remained in the ICU at least 48 hours. Comparisons between selected characteristics of survivor and non-survivor groups were done using univariate analysis; multivariate logistic regression was applied to determine factors associated with patient mortality. RESULTS: Of 838 eligible patients, 613 participated in the study. Men represented the majority (61.2%) of the patients, the median age was 53 years, and the global mortality rate was 39.6% (n= 243). Non-recovery of renal function after AKI (OR= 92.7 [38.43 - 223.62]; p <0.001), major surgery-associated AKI diagnosis (OR= 16.22 [3.49 - 75.38]; p <0.001), and the use of vasoactive drugs during the ICU stay (OR = 11.49 [2.46 - 53.70]; p <0.002) were the main factors independently associated with patient mortality. CONCLUSION: The mortality rate observed in this study was similar to that verified in other centers. Non-recovery of renal function was the variable most strongly associated with patient mortality, suggesting that the prevention of factors that aggravate or maintain the AKI episode should be actively identified and mitigated, possibly constituting an important strategy to reduce mortality in AKI patients.

Incidence and risk factors of acute kidney injury in critically ill patients from a single centre in Brazil: a retrospective cohort analysis.

Studies with a comprehensive analysis of the epidemiology of acute kidney injury (AKI) in intensive care units (ICUs) are still limited in developing countries. The aim of this study is to identify the incidence and risk factors of AKI in critically ill patients from a Brazilian ICU. We performed a retrospective analysis of the records of patients admitted to a single-centre adult ICU in Brazil between 1 January 2011 and 31 December 2016. The KDIGO criteria were used to define AKI. Univariate and multivariate data analyses were carried out. We included 1,500 patients. The incidence of AKI was 40.5%, and the AKI dialysis rate was 13%. The predictors of AKI at ICU admission included hypertension [odds ratio (OR) = 1.44, p 0.017], high serum creatinine concentration [OR = 3.54; p < 0.001], low serum albumin concentration [OR = 1.42, p 0.015], high APACHE II score [OR = 2.10; p < 0.001] and high SAPS 3 [OR = 1.75; p < 0.001]. The incidence of AKI was high, and we identified the predictors of AKI among critically ill Brazilian patients. The results of this study may contribute to the implementation of targeted therapies.

An epidemiologic overview of acute kidney injury in intensive care units.

INTRODUCTION: Acute kidney injury (AKI) is a frequent event among critically ill patients hospitalized in intensive care units (ICU) and represents a global public health problem, being imperative an interdisciplinary approach. OBJECTIV: To investigate, through literature review, the AKI epidemiology in ICUs. METHODS: Online research in Medline, Scientific Electronic Library Online, and Latin American and Caribbean Literature in Health Sciences databases, with analysis of the most relevant 47 studies published between 2010 and 2017. RESULTS: Data of the 67,033 patients from more than 300 ICUs from different regions of the world were analyzed. The overall incidence of AKI ranged from 2.5% to 92.2%, and the mortality from 5% to 80%. The length of ICU stay ranged from five to twenty-one days, and the need for renal replacement therapy from 0.8% to 59.2%. AKI patients had substantially higher mortality rates and longer hospital stays than patients without AKI. CONCLUSION: AKI incidence presented high variability among the studies. One of the reasons for that were the different criteria used to define the cases. Availability of local resources, renal replacement therapy needs, serum creatinine at ICU admission, volume overload, and sepsis, among others, influence mortality rates in AKI patients.

Kidney transplantation epidemiology in Brazil / Epidemiología del trasplante renal en Brasil

BACKGROUND: In 2015, were celebrated in Brazil 50 years of kidney transplants, whose activities have been registered since 1995 by the Brazilian Association of Organ Transplantation (ABTO). Purpose: To evaluate the quantitative evolution of renal transplants that occurred in Brazil during the period from 1995 to 2015 and to classify the country's position in the international scenario. METHODS: Ecological and retrospective study, based on data records published by ABTO and the International Registry in Organ Donation and Transplantation (IRODaT). RESULTS: During the period evaluated, there were 75,479 kidney transplants in Brazil, 43,771 (58%) of deceased donors. The southeastern region had the highest absolute number (n = 44,746; 59.3%) and, the north, the lowest (n = 1159; 1.6%). The cumulative percentage variation of transplants was 121%, and the annual variation was negative on six occasions (1996, 1997, 2002, 2005, 2006, 2015). The number of effective transplantation teams had a weak relation with the number of procedures performed (r = 0.45, p: 0.03). Brazil was the second country with the highest absolute number of transplants in the period of analysis, considering a world ranking with 30 nations. CONCLUSION: The number of renal transplants in Brazil increased significantly over the years. However, the efforts of those involved in the different phases of the donation-transplant process should be continuous

ANTECEDENTES: En 2015, se conmemoraron 50 años de realización de trasplantes renales en Brasil, cuyas actividades son registradas desde 1995 por la Asociación Brasileña de Trasplante de Órganos (ABTO). OBJETIVOS: Evaluar la evolución cuantitativa de los trasplantes renales ocurridos en Brasil durante el período 1995 a 2015 y clasificar la posición del país en el escenario internacional. MÉTODOS: Estudio ecológico y retrospectivo, basado en registros de datos divulgados por la ABTO y por el International Registry in Organ Donation and Transplantation (IRODaT). RESULTADOS: En el período evaluado, ocurrieron 75.479 trasplantes renales en Brasil, siendo 43.771 (58%) de donantes fallecidos. La región sudeste presentó el mayor número absoluto (n = 44.746, 59,3%) y, al norte, el menor (n = 1.159, 1,6%). La variación porcentual acumulada de trasplantes fue del 121% y la variación anual fue negativa en seis ocasiones (1996, 1997, 2002, 2005, 2006, 2015). El cuantitativo de equipos trasplantadores efectivos tuvo una débil relación con el número de procedimientos realizados (r = 0,45, p-valor: 0,03). Brasil fue el segundo país con mayor número absoluto del trasplante en el período de análisis, considerando un ranking mundial con 30 naciones. CONCLUSIÓN: El cuantitativo de trasplantes renales en el país presentó un importante incremento a lo largo de los años. Sin embargo, los esfuerzos de los involucrados en las diferentes fases del proceso de donación-trasplante deben ser continuos

An epidemiologic overview of acute kidney injury in intensive care units

SUMMARY INTRODUCTION Acute kidney injury (AKI) is a frequent event among critically ill patients hospitalized in intensive care units (ICU) and represents a global public health problem, being imperative an interdisciplinary approach. OBJECTIV To investigate, through literature review, the AKI epidemiology in ICUs. METHODS: Online research in Medline, Scientific Electronic Library Online, and Latin American and Caribbean Literature in Health Sciences databases, with analysis of the most relevant 47 studies published between 2010 and 2017. RESULTS Data of the 67,033 patients from more than 300 ICUs from different regions of the world were analyzed. The overall incidence of AKI ranged from 2.5% to 92.2%, and the mortality from 5% to 80%. The length of ICU stay ranged from five to twenty-one days, and the need for renal replacement therapy from 0.8% to 59.2%. AKI patients had substantially higher mortality rates and longer hospital stays than patients without AKI. CONCLUSION AKI incidence presented high variability among the studies. One of the reasons for that were the different criteria used to define the cases. Availability of local resources, renal replacement therapy needs, serum creatinine at ICU admission, volume overload, and sepsis, among others, influence mortality rates in AKI patients.

RESUMO INTRODUÇÃO Injúria renal aguda (IRA) é um evento frequente entre pacientes criticamente enfermos internados em unidade de terapia intensiva (UTI) e representa um problema de saúde pública global, sendo imperativa uma abordagem interdisciplinar. OBJETIVO Investigar, por meio de revisão de literatura, a epidemiologia da IRA em UTIs. MÉTODOS Pesquisa on-line nas bases de dados Medline, Scientific Electronic Library Online e Literatura Latino-americana e do Caribe em Ciências da Saúde, com análise dos 47 estudos de maior relevância publicados entre 2010 e 2017. RESULTADOS Foram analisados dados de 67.033 pacientes, internados em mais de 300 UTIs de diferentes regiões do mundo. A incidência global de IRA variou de 2,5% a 92,2% e a mortalidade, entre 5% e 80%. O tempo de internação em UTI variou de cinco a 21 dias, enquanto que a necessidade de terapia renal substitutiva, de 0,8% a 59,2%. Pacientes com IRA apresentam índice de mortalidade substancialmente maior e tempo de internação mais elevado, em comparação com pacientes sem IRA. CONCLUSÃO: A incidência de IRA apresentou alta variabilidade entre os estudos e, dentre os motivos, estão os diferentes critérios utilizados para definição dos casos. Disponibilidade de recursos locais, necessidade de terapia renal substitutiva, creatinina na admissão na UTI, sobrecarga volêmica e sepse, dentre outros, influenciam as taxas de mortalidade entre os pacientes com IRA.

Kidney transplantation epidemiology in Brazil.

BACKGROUND: In 2015, were celebrated in Brazil 50 years of kidney transplants, whose activities have been registered since 1995 by the Brazilian Association of Organ Transplantation (ABTO). PURPOSE: To evaluate the quantitative evolution of renal transplants that occurred in Brazil during the period from 1995 to 2015 and to classify the country's position in the international scenario. METHODS: Ecological and retrospective study, based on data records published by ABTO and the International Registry in Organ Donation and Transplantation (IRODaT). RESULTS: During the period evaluated, there were 75,479 kidney transplants in Brazil, 43,771 (58%) of deceased donors. The southeastern region had the highest absolute number (n=44,746; 59.3%) and, the north, the lowest (n=1159; 1.6%). The cumulative percentage variation of transplants was 121%, and the annual variation was negative on six occasions (1996, 1997, 2002, 2005, 2006, 2015). The number of effective transplantation teams had a weak relation with the number of procedures performed (r=0.45, p: 0.03). Brazil was the second country with the highest absolute number of transplants in the period of analysis, considering a world ranking with 30 nations. CONCLUSION: The number of renal transplants in Brazil increased significantly over the years. However, the efforts of those involved in the different phases of the donation-transplant process should be continuous.

Metabolic investigation in patients with nephrolithiasis.

OBJECTIVE: To evaluate the prevalence of metabolic disorders associated with nephrolithiasis in a female population. METHODS: A retrospective study on 1,737 patients with evidence of recent formation of renal stones, being 54% females. The laboratory investigation consisted of at least two samples of blood and 24-hour urine to assess calcium, uric acid, citrate and creatinine levels, qualitative cystinuria, urinary pH following fasting and 12-hour water restriction, urine culture, serum creatinine and parathyroid hormone. RESULTS: The most frequent alterations were hypercalciuria (40.9%), urinary tract infection (23.2%), hypocitraturia (22.4%), low urinary volume (20.5%) and hyperuricosuria (16%). CONCLUSION: The most frequent metabolic alterations in females were hypocitraturia, urinary tract infection, low urinary volume and hyperuricosuria.

Uso de tacrolimus na nefrite lúpica / Use of tacrolimus in lupus nephritis

O lúpus eritematoso sistêmico é uma doença multissistêmica, de etiologia autoimune, que apresenta comprometimento renal em até 50% dos portadores. A nefrite lúpica é uma das mais sérias e comuns complicações do lúpus eritematoso sistêmico, especialmente nos pacientes não caucasianos. Drogas como ciclofosfamida (que faz a terapia de indução convencional, junto de corticosteroides), azatioprina, micofenolato de mofetila e hidroxicloroquina são essenciais para o tratamento desta complicação, porém ainda são necessárias outras opções terapêuticas em casos resistentes. O tacrolimus vem sendo utilizado recentemente no tratamento da nefrite lúpica, com escassas publicações a este respeito. Apresentamos revisão sobre o papel do tacrolimus na nefrite lúpica, utilizando artigos publicados nas principais bases de dados da literatura nacional e internacional, nos idiomas espanhol e inglês.(AU)

Systemic lupus erythematosus (SLE) is a multisystemic disease of autoimmune etiology that involves renal impairment in up to 50% of patients. Lupus nephritis (LN) is one of the most serious and common complications of systemic lupus erythematosus, especially in non-Caucasian patients. Drugs such as cyclophosphamide (which performs the conventional induction therapy along with corticosteroids), azathioprine, mycophenolate mofetil, and hydroxychloroquine are essential for the treatment of this complication, but other therapeutic options in resistant cases are also necessary. Tacrolimus has recently been used in the treatment of lupus nephritis, with few publications in this regard. We present a review of the role of tacrolimus in lupus nephritis using articles published in the main databases of national and international literature, in Spanish and English languages.(AU)

Metabolic investigation in patients with nephrolithiasis / Investigação metabólica em pacientes com nefrolitíase

ABSTRACT: Objective: To evaluate the prevalence of metabolic disorders associated with nephrolithiasis in a female population. Methods: A retrospective study on 1,737 patients with evidence of recent formation of renal stones, being 54% females. The laboratory investigation consisted of at least two samples of blood and 24-hour urine to assess calcium, uric acid, citrate and creatinine levels, qualitative cystinuria, urinary pH following fasting and 12-hour water restriction, urine culture, serum creatinine and parathyroid hormone. Results: The most frequent alterations were hypercalciuria (40.9%), urinary tract infection (23.2%), hypocitraturia (22.4%), low urinary volume (20.5%) and hyperuricosuria (16%). Conclusion: The most frequent metabolic alterations in females were hypocitraturia, urinary tract infection, low urinary volume and hyperuricosuria.

RESUMO Objetivo: Avaliar a prevalência dos distúrbios metabólicos associados à nefrolitíase em uma população feminina. Métodos: Foi realizado um estudo retrospectivo em 1.737 pacientes com evidência de formação recente de cálculos renais, sendo 54% do sexo feminino. A avaliação laboratorial constou de duas ou mais amostras de sangue e urina de 24 horas com dosagens de cálcio, ácido úrico, citrato e creatinina cistinúria qualitativa, pH urinário em jejum e restrição hídrica de 12 horas, urocultura, creatinina e paratormônio séricos. Resultados: As alterações mais encontradas foram hipercalciúria (40,9%), infecção do trato urinário (23,2%), hipocitratúria (22,4%), baixo volume urinário (20,5%) e hiperuricosúria (16%). Conclusão: As alterações metabólicas mais frequentes na população feminina foram hipocitratúria, infecção do trato urinário, baixo volume urinário e hiperuricosúria.

Risk factors for acute kidney injury after partial hepatectomy.

AIM: To identify risk factors for the occurrence of acute kidney injury (AKI) in the postoperative period of partial hepatectomies. METHODS: Retrospective analysis of 446 consecutive resections in 405 patients, analyzing clinical characteristics, preoperative laboratory data, intraoperative data, and postoperative laboratory data and clinical evolution. Adopting the International Club of Ascites criteria for the definition of AKI, potential predictors of AKI by logistic regression were identified. RESULTS: Of the total 446 partial liver resections, postoperative AKI occurred in 80 cases (17.9%). Identified predictors of AKI were: Non-dialytic chronic kidney injury (CKI), biliary obstruction, the Model for End-Stage Liver Disease (MELD) score, the extent of hepatic resection, the occurrence of intraoperative hemodynamic instability, post-hepatectomy haemorrhage, and postoperative sepsis. CONCLUSION: The MELD score, the presence of non-dialytic CKI and biliary obstruction in the preoperative period, and perioperative hemodynamics instability, bleeding, and sepsis are risk factors for the occurrence of AKI in patients that underwent partial hepatectomy.