Fluid accumulation in critically ill children: a systematic review and meta-analysis.

Background: Fluids are often administered for various purposes, such as resuscitation, replacement, maintenance, nutrition, or drug infusion. However, its use is not without risks. Critically ill patients are highly susceptible to fluid accumulation (FA), which is associated with poor outcomes, including organ dysfunction, prolonged mechanical ventilation, extended hospital stays, and increased mortality. This study aimed to assess the association between FA and poor outcomes in critically ill children. Methods: In this systematic review and meta-analysis, we searched PubMed, Embase, ClinicalTrials.gov, and Cochrane Library databases from inception to May 2024. Relevant publications were searched using the following terms: child, children, infant, infants, pediatric, pediatrics, critically ill children, critical illness, critical care, intensive care, pediatric intensive care, pediatric intensive care unit, fluid balance, fluid overload, fluid accumulation, fluid therapy, edema, respiratory failure, respiratory insufficiency, pulmonary edema, mechanical ventilation, hemodynamic instability, shock, sepsis, acute renal failure, acute kidney failure, acute kidney injury, renal replacement therapy, dialysis, mortality. Paediatric studies were considered eligible if they assessed the effect of FA on the outcomes of interest. The main outcome was all-cause mortality. Pooled analyses were performed by using random-effects models. This review was registered on PROSPERO (CRD42023432879). Findings: A total of 120 studies (44,682 children) were included. Thirty-five FA definitions were identified. In general, FA was significantly associated with increased mortality (odds ratio [OR] 4.36; 95% confidence interval [CI] 3.53-5.38), acute kidney injury (OR 1.98; 95% CI 1.60-2.44), prolonged mechanical ventilation (weighted mean difference [WMD] 38.1 h, 95% CI 19.35-56.84), and longer stay in the intensive care unit (WMD 2.29 days; 95% CI 1.19-3.38). The percentage of FA was lower in survivors when compared to non-survivors (WMD -4.95 [95% CI, -6.03 to -3.87]). When considering only studies that controlled for potential confounding variables, the pooled analysis revealed 6% increased odds of mortality associated with each 1% increase in the percentage of FA (adjusted OR = 1.06 [95% CI, 1.04-1.09). Interpretation: FA is significantly associated with poorer outcomes in critically ill children. Thus, clinicians should closely monitor fluid balance, especially when new-onset or worsening organ dysfunction occurs in oedematous patients, indicating potential FA syndrome. Future research should explore interventions like restrictive fluid therapy or de-resuscitation methods. Meanwhile, preventive measures should be prioritized to mitigate FA until further evidence is available. Funding: None.

Fluid Responsiveness Is Associated with Successful Weaning after Liver Transplant Surgery.

A positive fluid balance may evolve to fluid overload and associate with organ dysfunctions, weaning difficulties, and increased mortality in ICU patients. We explored whether individualized fluid management, assessing fluid responsiveness via a passive leg-raising maneuver (PLR) before a spontaneous breathing trial (SBT), is associated with less extubation failure in ventilated patients with a high fluid balance admitted to the ICU after liver transplantation (LT). We recruited 15 LT patients in 2023. Their postoperative fluid balance was +4476 {3697, 5722} mL. PLR maneuvers were conducted upon ICU admission (T1) and pre SBT (T2). Cardiac index (CI) changes were recorded before and after each SBT (T3). Seven patients were fluid-responsive at T1, and twelve were responsive at T2. No significant differences occurred in hemodynamic, respiratory, and perfusion parameters between the fluid-responsive and fluid-unresponsive patients at any time. Fluid-responsive patients at T1 and T2 increased their CI during SBT from 3.1 {2.8, 3.7} to 3.7 {3.4, 4.1} mL/min/m2 (p = 0.045). All fluid-responsive patients at T2 were extubated after the SBTs and consolidated extubation. Two out of three of the fluid-unresponsive patients experienced weaning difficulties. We concluded that fluid-responsive patients post LT may start weaning earlier and achieve successful extubation despite a high postoperative fluid balance. This highlights the profound impact of personalized assessments of cardiovascular state on critical surgical patients.

Effect of High Sodium Intake on Gut Tight Junctions' Structure and Permeability to Bacterial Toxins in a Rat Model of Chronic Kidney Disease.

INTRODUCTION: Uremic toxicity changes the gut structure and permeability, allowing bacterial toxins to translocate from the lumen to the blood during chronic kidney failure (CKD). Clinical fluid overload and tissue edema without uremia have similar effects but have not been adequately demonstrated and analyzed in CKD. AIMS: To investigate the effect of sodium intake on the plasma concentration of gut-derived uremic toxins, indoxyl sulfate (IS), and p-cresyl sulfate (pCS) and the expression of genes and proteins of epithelial gut tight junctions in a rat model of CKD. METHODS: Sham-operated (control group, CG) and five-sixths nephrectomized (5/6Nx) Sprague-Dawley rats were randomly assigned to low (LNa), normal (NNa), or high sodium (HNa) diets., Animals were then sacrificed at 8 and 12 weeks and analyzed for IS and pCS plasma concentrations, as well as for gene and protein expression of thigh junction proteins, and transmission electron microscopy (TEM) in colon fragments. RESULTS: The HNa 5/6Nx groups had higher concentrations of IS and pCS than CG, NNa, and LNa at eight and twelve weeks. Furthermore, HNa 5/6Nx groups had reduced expression of the claudin-4 gene and protein than CG, NNa, and LNa. HNa had reduced occludin gene expression compared to CG. Occludin protein expression was more reduced in HNa than in CG, NNa, and LNa. The gut epithelial tight junctions appear dilated in HNa compared to NNa and LNa in TEM. CONCLUSION: Dietary sodium intake and fluid overload have a significant role in gut epithelial permeability in the CKD model.

Fluid balance, biomarkers of renal function and mortality in critically ill patients with AKI diagnosed before, or within 24 h of intensive care unit admission: a prospective study.

BACKGROUND: To evaluate fluid balance, biomarkers of renal function and its relation to mortality in patients with acute kidney injury (AKI) diagnosed before, or within 24 h of intensive care unit admission. METHODS: A prospective cohort study considered 773 critically ill patients observed over six years. Pre-intensive care unit-onset AKI was defined as AKI diagnosed before, or within 24 h of intensive care unit admission. Body weight-adjusted fluid balance and fluid balance-adjusted biomarkers of renal function were measured daily for the first three days of intensive care unit admission. Primary outcome was mortality in the intensive care unit. RESULTS: Prevalence of pre-intensive care unit-onset AKI was 55.1%, of which 55.6% of cases were hospital-acquired and 44.4% were community-acquired. Fluid balance was higher in AKI patients than in non-AKI patients (p < 0.001) and had a negative correlation with urine output (p < 0.01). Positive fluid balance and biomarkers of renal function were independently related to mortality. Multivariate analysis identified the following AKI-related variables associated with increased mortality: (1) In AKI patients: type 1 cardiorenal syndrome (OR 2.00), intra-abdominal hypertension (OR 1.71), AKI stage 3 (OR 2.15) and increase in AKI stage (OR 4.99); 2) In patients with community-acquired AKI: type 1 cardiorenal syndrome (OR 5.16), AKI stage 2 (OR 2.72), AKI stage 3 (OR 4.95) and renal replacement therapy (OR 3.05); and 3) In patients with hospital-acquired AKI: intra-abdominal hypertension (OR 2.31) and increase in AKI stage (OR 4.51). CONCLUSIONS: In patients with pre-intensive care unit-onset AKI, positive fluid balance is associated with worse renal outcomes. Positive fluid balance and decline in biomarkers of renal function are related to increased mortality, thus in this subpopulation of critically ill patients, positive fluid balance is not recommended and renal function must be closely monitored.

Fluid Status Assessment in Critically Ill Patients with COVID-19: A Retrospective Cohort Study.

Fluid status (FS) is a diagnostic challenge in critically ill patients with COVID-19. Here, we compared parameters related to FS derived from cumulative fluid balance (CFB), bioelectrical impedance analysis (BIA) and venous congestion assessed by ultrasound (VExUS) to predict mortality. We retrospectively reviewed the medical records of individuals with severe pneumonia due to COVID-19 between July and November 2021 in a single center. Comorbidities, demographic, clinical and laboratory data as well as results from CFB, BIA and VExUS measurements were collected on admission and weekly afterwards for two consecutive evaluations. Seventy-nine patients were included, of which eighteen (14.2%) died. Abnormalities of FS were only identified by BIA. Extracellular water/total body water ratio (ECW/TBW) > 0.394 (overhydrated) by BIA was a good predictor of mortality (AUC = 0.78, 95% CI: 0.067-0.89). Mortality risk was higher in overhydrated patients (OR: 6.2, 95% CI: 1.2-32.6, p = 0.02) and in persistently overhydrated patients (OR: 9.57, 95% CI: 1.18-77.5, p = 0.03) even after adjustment to age, serum albumin and acute kidney injury (AKI) in stages 2-3. Time to death was shorter in overhydrated patients (HR: 2.82, 95% CI: 1.05-7.5, log-rank test p = 0.03). Abnormalities in FS associated with mortality were only identified by BIA in critically ill patients with COVID-19.

Fluid overload: clinical outcomes in pediatric intensive care unit

Abstract Objective The aim of this study was to analyze the effects of fluid overload related to mechanical ventilation, renal replacement therapy, and evolution to discharge or death in critically ill children. Methods A retrospective study in a Pediatric Intensive Care Unit for two years. Patients who required invasive ventilatory support and vasopressor and/or inotropic medications were considered critically ill. Results 70 patients were included. The mean age was 6.8 ± 6 years. There was a tolerable increase in fluid overload during hospitalization, with a median of 2.45% on the first day, 5.10% on the third day, and 8.39% on the tenth day. The median fluid overload on the third day among those patients in pressure support ventilation mode was 4.80% while the median of those who remained on controlled ventilation was 8.45% (p = 0.039). Statistical significance was observed in the correlations between fluid overload measurements on the first, third, and tenth days of hospitalization and the beginning of renal replacement therapy (p = 0.049) and between renal replacement therapy and death (p = 0.01). The median fluid overload was 7.50% in patients who died versus 4.90% in those who did not die on the third day of hospitalization (p = 0.064). There was no statistically significant association between death and the variables sex or age. Conclusions The fluid overload on the third day of hospitalization proved to be a determinant for the clinical outcomes of weaning from mechanical ventilation, initiation of renal replacement therapy, discharge from the intensive care unit, or death among these children.

Diuretics and Ultrafiltration in Heart Failure.

Fluid overload is a risk factor for increased morbidity and mortality, especially in patients with heart disease. The treatment options are limited to diuretics and mechanical fluid removal using ultrafiltration or renal replacement therapy. This paper provides an overview of the challenges of managing fluid overload, outlines the risks and benefits of different pharmacological options and extracorporeal techniques, and provides guidance for clinical practice.

Fluid overload: clinical outcomes in pediatric intensive care unit.

OBJECTIVE: The aim of this study was to analyze the effects of fluid overload related to mechanical ventilation, renal replacement therapy, and evolution to discharge or death in critically ill children. METHODS: A retrospective study in a Pediatric Intensive Care Unit for two years. Patients who required invasive ventilatory support and vasopressor and/or inotropic medications were considered critically ill. RESULTS: 70 patients were included. The mean age was 6.8 ± 6 years. There was a tolerable increase in fluid overload during hospitalization, with a median of 2.45% on the first day, 5.10% on the third day, and 8.39% on the tenth day. The median fluid overload on the third day among those patients in pressure support ventilation mode was 4.80% while the median of those who remained on controlled ventilation was 8.45% (p = 0.039). Statistical significance was observed in the correlations between fluid overload measurements on the first, third, and tenth days of hospitalization and the beginning of renal replacement therapy (p = 0.049) and between renal replacement therapy and death (p = 0.01). The median fluid overload was 7.50% in patients who died versus 4.90% in those who did not die on the third day of hospitalization (p = 0.064). There was no statistically significant association between death and the variables sex or age. CONCLUSIONS: The fluid overload on the third day of hospitalization proved to be a determinant for the clinical outcomes of weaning from mechanical ventilation, initiation of renal replacement therapy, discharge from the intensive care unit, or death among these children.

Portable sauna stimulated-diaphoresis for the treatment of fluid-overload in peritoneal dialysis patients: A pilot study.

Background: Fluid overload (FO) is a common problem in patients with peritoneal dialysis (PD), it is associated with adverse outcomes and may persist despite adjustements in PD therapy. Objective: To evaluate the feasibility and safety of stimulated diaphoresis to reduce FO with the use of a portable sauna bath. Methods: Open-label pilot study in patients on continuous ambulatory peritoneal dialysis (CAPD) and FO. The primary outcome was the treatment-related adverse events; secondary outcomes were changes in over-hydration (OH), body weight and blood pressure, FO symptoms, and sleep quality. Dialysis prescription and daily data were recorded. The intervention period consisted in a 30-min, 45°C sauna bath, daily for 10 days, using a portable sauna bath. Results: Fifty-one out of 54 total sauna bath sessions were well tolerated. In three (5.5%) sessions adverse effects were reported: transient dizziness in two cases, and a second-degree skin burn in a patient with advanced diabetic neuropathy. OH (6.3 ± 1.2 L vs. 5.5 ± 1.3 L, p = 0.05), body weight (67.7 ± 11.4 vs. 66.8 ± 3.8 kg, p = 0.003), diastolic blood pressure (92 ± 13.5 vs. 83 ± 13.3 mmHg, P = 0.003) and PSQI score (7.3 ± 3.7 vs. 5.1 ± 3.2, p = 0.02) improved significantly between the control and intervention period, respectively. Conclusions: Stimulated diaphoresis with a portable sauna bath could be a novel, safe, and effective alternative way to reduce FO in CAPD patients. Larger studies are needed to confirm our results. Clinical trial registration: ClinicalTrials.gov, identifier: NCT03563898.

Fluid overload as a predictor of morbidity and mortality in pediatric patients following congenital heart surgery.

BACKGROUND: Patients undergoing congenital heart surgery with cardiopulmonary bypass frequently require the administration of intravenous fluids and blood products due to hemodynamic instability. Correctly performed fluid resuscitation can revert the state of tissue hypoperfusion in the different organs. However, excessive fluid administration and acute kidney injury may promote fluid overload (FO) and increase the risk of complications, hospital stay, and mortality. METHODS: We conducted a prospective longitudinal study of pediatric patients with congenital heart surgery and cardiopulmonary bypass in the Pediatric Cardiac Intensive Care Unit (PCICU), Instituto Nacional de Pediatría, from July 2018 to December 2019. Fluid overload was quantified every 24 hours during the first 3 days of stay at the PCICU and expressed as a percentage. We recorded PCICU stay, days of mechanical ventilation, and mortality as outcome variables. RESULTS: We included 130 patients. The main factors associated with fluid overload were age < 1 year (p < 0.001), weight < 5 kg (p < 0.001), and longer cardiopulmonary bypass time (p = 0.003). Patients with fluid overload ≥ 5% had higher inotropic score (p < 0.001), higher oxygenation index (p < 0.001), and longer mechanical ventilation time (p < 0.001). Fluid overload ≥ 5% was associated with higher postoperative mortality (odds ratio 89, p = 0.004). CONCLUSIONS: Fluid overload can be used as a prognostic factor in the evolution of pediatric patients undergoing congenital heart surgery since it is associated with increased morbidity and mortality.

INTRODUCCIÓN: Los pacientes con cirugía cardiaca congénita en la que se emplea una bomba de circulación extracorpórea frecuentemente requieren la administración de líquidos intravenosos y hemoderivados por inestabilidad hemodinámica. La resucitación con volumen realizada adecuadamente puede revertir el estado de hipoperfusión tisular en los diferentes órganos. Sin embargo, el ingreso excesivo de líquidos y la falla renal aguda pueden favorecer la sobrecarga hídrica (SH) e incrementar el riesgo de complicaciones, la estancia hospitalaria y la mortalidad. MÉTODOS: Se llevó a cabo un estudio prospectivo longitudinal de pacientes pediátricos con cirugía del corazón y empleo de bomba de circulación extracorpórea en la Unidad de Cuidados Intensivos Cardiovasculares (UCICV), Instituto Nacional de Pediatría, de julio 2018 a diciembre 2019. La SH, registrada como porcentaje, fue cuantificada cada 24 horas durante los primeros 3 días de estancia en UCICV. Como variables de desenlace se registraron la estancia en UCICV, el tiempo de ventilación mecánica y la mortalidad. ­. RESULTADOS: Se incluyeron 130 pacientes. Los principales factores asociados con la SH fueron la edad < 1 año (p < 0.001), peso < 5 kg (p < 0.001) y mayor tiempo de circulación extracorpórea (p = 0.003). Los pacientes con SH ≥ 5% presentaron mayor puntaje inotrópico (p < 0.001), mayor índice de oxigenación (p < 0.001) y mayor tiempo de ventilación mecánica (p < 0.001). La SH ≥ 5% se asoció con una mayor probabilidad de muerte en el periodo posoperatorio (razón de momios: 89, p = 0.004). CONCLUSIONES: La SH puede utilizarse como factor pronóstico en la evolución de los pacientes pediátricos operados de corazón, ya que se asocia con una mayor morbimortalidad.

Fluid overload as a predictor of morbidity and mortality in pediatric patients following congenital heart surgery / Sobrecarga hídrica como predictor de morbilidad y mortalidad en pacientes pediátricos operados de corazón

Abstract Background: Patients undergoing congenital heart surgery with cardiopulmonary bypass frequently require the administration of intravenous fluids and blood products due to hemodynamic instability. Correctly performed fluid resuscitation can revert the state of tissue hypoperfusion in the different organs. However, excessive fluid administration and acute kidney injury may promote fluid overload (FO) and increase the risk of complications, hospital stay, and mortality. Methods: We conducted a prospective longitudinal study of pediatric patients with congenital heart surgery and cardiopulmonary bypass in the Pediatric Cardiac Intensive Care Unit (PCICU), Instituto Nacional de Pediatría, from July 2018 to December 2019. Fluid overload was quantified every 24 hours during the first 3 days of stay at the PCICU and expressed as a percentage. We recorded PCICU stay, days of mechanical ventilation, and mortality as outcome variables. Results: We included 130 patients. The main factors associated with fluid overload were age < 1 year (p < 0.001), weight < 5 kg (p < 0.001), and longer cardiopulmonary bypass time (p = 0.003). Patients with fluid overload ≥ 5% had higher inotropic score (p < 0.001), higher oxygenation index (p < 0.001), and longer mechanical ventilation time (p < 0.001). Fluid overload ≥ 5% was associated with higher postoperative mortality (odds ratio 89, p = 0.004). Conclusions: Fluid overload can be used as a prognostic factor in the evolution of pediatric patients undergoing congenital heart surgery since it is associated with increased morbidity and mortality.

Resumen Introducción: Los pacientes con cirugía cardiaca congénita en la que se emplea una bomba de circulación extracorpórea frecuentemente requieren la administración de líquidos intravenosos y hemoderivados por inestabilidad hemodinámica. La resucitación con volumen realizada adecuadamente puede revertir el estado de hipoperfusión tisular en los diferentes órganos. Sin embargo, el ingreso excesivo de líquidos y la falla renal aguda pueden favorecer la sobrecarga hídrica (SH) e incrementar el riesgo de complicaciones, la estancia hospitalaria y la mortalidad. Métodos: Se llevó a cabo un estudio prospectivo longitudinal de pacientes pediátricos con cirugía del corazón y empleo de bomba de circulación extracorpórea en la Unidad de Cuidados Intensivos Cardiovasculares (UCICV), Instituto Nacional de Pediatría, de julio 2018 a diciembre 2019. La SH, registrada como porcentaje, fue cuantificada cada 24 horas durante los primeros 3 días de estancia en UCICV. Como variables de desenlace se registraron la estancia en UCICV, el tiempo de ventilación mecánica y la mortalidad. Resultados: Se incluyeron 130 pacientes. Los principales factores asociados con la SH fueron la edad < 1 año (p < 0.001), peso < 5 kg (p < 0.001) y mayor tiempo de circulación extracorpórea (p = 0.003). Los pacientes con SH ≥ 5% presentaron mayor puntaje inotrópico (p < 0.001), mayor índice de oxigenación (p < 0.001) y mayor tiempo de ventilación mecánica (p < 0.001). La SH ≥ 5% se asoció con una mayor probabilidad de muerte en el periodo posoperatorio (razón de momios: 89, p = 0.004). Conclusiones: La SH puede utilizarse como factor pronóstico en la evolución de los pacientes pediátricos operados de corazón, ya que se asocia con una mayor morbimortalidad.

Cardiorenal syndrome: classification, pathophysiology, diagnosis and management. Literature review / Síndrome cardiorrenal: clasificación, fisiopatología, diagnóstico y tratamiento. Una revisión de las publicaciones médicas.

The cardiorenal syndrome is a complex entity in which a primary heart dysfunction causes kidney injury (Types 1 and 2) and vice versa (Types 3 and 4), being either acute or chronic events, or maybe the result of a systemic disease that involves both organs (Type 5). Approximately 49% of heart failure cases present some grade of kidney dysfunction, significantly increasing morbidity and mortality rates. Its pathogenesis involves a variety of hemodynamic, hormonal and immunological factors that in the majority of cases produce fluid overload; the diagnosis and treatment of such constitutes the disease's management basis. Currently, a clinical based diagnosis is insufficient and the use of biochemical markers, such as natriuretic peptides, or lung and heart ultrasound is required. These tools, along with urinary sodium levels, allow the evaluation of therapy effectiveness. The preferred initial decongestive strategy is based on a continuous infusion of a loop diuretic with a step-up dosing regimen, aiming for a minimal daily urine volume of 3 liters, with the possibility to sequentially add potassium sparing diuretics, thiazide diuretics and carbonic anhydrase inhibitors to reach the diuresis goal, leaving ultrafiltration as a last resource due to its higher rate of complications. Finally, evidence-based therapy should be given to improve quality of life, decrease mortality, and delay the deterioration of kidney and heart function over the long term.

El síndrome cardiorrenal es una entidad compleja en la que la disfunción primaria cardíaca produce daño renal (tipos 1 y 2) y viceversa (tipos 3 y 4) y los episodios pueden ser agudos o crónicos o bien efecto de una enfermedad sistémica que afecta a ambos órganos (tipo 5). Hasta 49% de los pacientes con insuficiencia cardíaca muestra algún grado de disfunción renal, lo que aumenta de manera significativa la morbilidad y mortalidad. Su patogenia incluye diversos factores hemodinámicos, hormonales e inmunológicos que en la mayor parte de los casos producen sobrecarga hídrica, y cuyo diagnóstico y tratamiento son la base de su atención. En la actualidad, el diagnóstico clínico es insuficiente y se requieren marcadores bioquímicos, como péptidos natriuréticos, o el uso de ultrasonido pulmonar y cardíaco; estas herramientas, junto con la medición del sodio urinario, también permiten vigilar la efectividad terapéutica. De modo inicial se prefieren las medidas descongestivas con diuréticos de asa en infusión continua a dosis escalonadas para alcanzar una diuresis mínima de 3 L por día, con la posibilidad de agregar diuréticos ahorradores de potasio, tiazidas e inhibidores de la anhidrasa carbónica de modo secuencial para alcanzar el objetivo; como último recurso se recurre a la ultrafiltración en virtud de su mayor tasa de complicaciones. Por último, se debe indicar tratamiento con base en la evidencia para mejorar la calidad de vida, reducir la mortalidad y retrasar el deterioro de la función renal y cardíaca a largo plazo.

Association between fluid overload and mortality in newborns: a systematic review and meta-analysis.

Fluid overload (FO) is associated with higher rates of mortality and morbidity in pediatric and adult populations. The aim of this systematic review and meta-analysis was to investigate the association between FO and mortality in critically ill neonates. Systematic search of Ovid MEDLINE, EMBASE, Cochrane Library, trial registries, and gray literature from inception to January 2021. We included all studies that examined neonates admitted to neonatal intensive care units and described FO and outcomes of interest. We identified 17 observational studies with a total of 4772 critically ill neonates who met the inclusion criteria. FO was associated with higher mortality (OR, 4.95 [95% CI, 2.26-10.87]), and survivors had a lower percentage of FO compared with nonsurvivors (WMD, - 4.33 [95% CI, - 8.34 to - 0.32]). Neonates who did not develop acute kidney injury (AKI) had lower FO compared with AKI patients (WMD, - 2.29 [95% CI, - 4.47 to - 0.10]). Neonates who did not require mechanical ventilation on postnatal day 7 had lower fluid balance (WMD, - 1.54 [95% CI, - 2.21 to - 0.88]). FO is associated with higher mortality, AKI, and need for mechanical ventilation in critically ill neonates in the intensive care unit. Strict control of fluid balance to prevent FO is essential. A higher resolution version of the Graphical abstract is available as Supplementary information.

Asociación del signo de Godet con la medición por ultrasonido del edema periférico y balance de líquidos. El resurgir de la clínica / Association of the Godet's sign with ultrasound measurement of peripheral edema and fluid balance. The resurrection of the clinic / Associação do sinal de Godet com medida de ultrassom de edema periférico e equilíbrio hidrográfico. O ressurgimento da clínica

Resumen: Introducción: la administración de líquidos representa una intervención terapéutica de primera línea. Sin embargo, con frecuencia esto conduce a sobrecarga de líquidos, lo que se asocia con alta mortalidad. Objetivo: describir la asociación del edema periférico medido por ultrasonido con el balance hídrico acumulado diario y comparar su correlación con el signo de Godet. Material y métodos: pacientes adultos que ingresaron a la unidad de terapia intensiva (UTI) con más de 24 h de estancia y datos clínicos de sobrecarga hídrica. Diseño: es un estudio observacional, prospectivo, longitudinal, simple ciego, piloto. Cálculo de muestra n = 72 pacientes. Resultados: la mediana de edad fue de 45 años, 96.6% estuvo con ventilación mecánica, todos los pacientes presentaron desenlace en el análisis multivariado ajustado y se detectó que hay asociación del signo de Godet con la medición del edema por ultrasonido, observando una fuerte correlación explicada por una R2 87% p = 0.0001. Por último, se realizó otra regresión de los mililitros del balance hídrico acumulado asociada con los milímetros del edema medidos por ultrasonido, encontrando una R2 82% (IC 95% 1.47-3.70 p = 0.0001) interpretado como una fuerte asociación. Conclusiones: el signo de Godet se asoció fuertemente con los milímetros del edema medido por ultrasonido, además tiene una fuerte asociación entre el balance de líquido acumulado por día con los milímetros de edema que se incrementan en el tejido periférico por sobrecarga al día.

Abstract: Introduction: the administration of fluids represents a first-line therapeutic intervention. However, this often leads to fluid overload, which is associated with high mortality. Objective: to describe the association of peripheral edema measured by ultrasound with daily accumulated water balance and to compare its correlation with Godet's sign. Material and methods: adult patients admitted to the intensive care unit with more than 24 hours of stay and clinical data of fluid overload. Design: this is an observational, prospective, longitudinal, single-blind, pilot study. Sample calculation n = 72 patients. Results: the median age was 45 years, 96.6% were on mechanical ventilation, all patients presented their outcome in the adjusted multivariate analysis, and it was found that there is an association of Godet's sign with the measurement of edema by ultrasound, finding a strong correlation explained by an R2 87% p = 0.0001. Finally, another regression of milliliters of accumulated water balance associated with milliliters of edema measured by ultrasound was performed, finding an R2 82% (95% CI 1.47-3.70 p = 0.0001) interpreted as a strong association. Conclusions: Godet's sign was strongly associated with the millimeters of edema measured by ultrasound; it also has a strong association between the balance of fluid accumulated per day with the millimeters of edema that increase in the peripheral tissue due to overload per day.

Resumo: Introdução: a administração de fluidos representa uma intervenção terapêutica de primeira linha. No entanto, isso freqüentemente leva à sobrecarga hidríca, que está associada a alta mortalidade. Objetivo: descrever a associação do edema periférico medido pela ultrassonografia com o balanço hídrico diário acumulado e comparar sua correlação com o sinal de Godet. Material e métodos: pacientes adultos admitidos na unidade de terapia intensiva (UTI) com mais de 24 horas de internação e com quadro clínico de sobrecarga hídrica. Desenho: é um estudo observacional, prospectivo, longitudinal, simples-cego, piloto. Cálculo amostra n = 72 pacientes. Resultados: a idade média foi de 45 anos, 96.6% estavam em ventilação mecânica, todos os pacientes apresentaram seu desfecho na análise multivariada ajustada e constatou-se que há associação do sinal de Godet com a medida do edema pela ultrassonografia, encontrando forte correlação explicado por um R2 87% p = 0.0001. Finalmente, realizou-se outra regressão dos mililitros de balanço hídrico acumulado associado aos milímetros de edema medidos por ultrassom, encontrando um R2 82% (IC 95% 1.47-3.70 p = 0.0001) interpretado como uma forte associação. Conclusões: o sinal de Godet foi fortemente associado com os milímetros de edema medidos por ultrassom, também tem forte associação entre o balanço hídrico acumulado por dia com os milímetros de edema que aumentam nos tecidos periféricos devido à sobrecarga por dia.

Usefulness of VExUS in a pediatric patient with Ebstein's anomaly / Utilidad de VExUS en paciente pediátrico portador de anomalía de Ebstein

The venous excess ultrasound grading system (VExUS) is a relatively new application of point of care ultrasound. It has been successfully used to monitor for fluid overload in adult post-operative cardiac surgery patients. It has not been described in the management of congenital cardiac disease. We present a novel use of VExUS to diagnose decompensated Ebstein's anomaly in a pediatric patient. A 13 year-old female with known stable Ebstein's anomaly presented with new onset fluid overload and oliguria. Using abdominal venous Doppler ultrasound and VExUS, we were able to quickly differentiate the cause of the patient's fluid overload as Ebstein's anomaly instead of a primary renal etiology. This is the first reported use of VExUS to diagnose acute fluid overload in a pediatric patient with Ebstein's anomaly. VExUS should be considered as a supplemental tool to diagnose fluid overload in other congenital cardiac diseases.

El sistema de gradiente por ultrasonidos de exceso venoso (VExUS), es una aplicación relativamente nueva de los ultrasonidos en el punto de cuidado. Esto ha sido utilizado exitosamente para monitorizar la sobrecarga de fluidos en pacientes adultos en el período posoperatorio de cirugía cardíaca. No ha sido descripto en el manejo de las cardiopatías congénitas. Nosotros presentamos un novedoso uso de VExUS para diagnosticar una anomalía de Ebstein descompensada en un paciente pediátrico. Paciente femenina de 13 años de edad con una anomalía de Ebstein compensada en su evolución, se presenta con sobrecarga de fluidos y oliguria. Usando ultrasonidos Doppler de vasos abdominales (VExUS), fue posible diferenciar rápidamente la causa de la sobrecarga de fluidos en una anomalía de Ebstein que provoca insuficiencia renal. Este el primer caso reportado del uso del VExUS para el diagnóstico de sobrecarga de fluidos en pacientes pediátricos con anomalía de Ebstein. El score VExUS debería ser considerado como método complementario en el diagnóstico de la sobrecarga de fluidos en otras cardiopatías congénitas.

Fluid restriction versus volume expansion in children with diarrhea-associated HUS: a retrospective observational study.

BACKGROUND: Fifty percent of patients with typical diarrhea-associated hemolytic uremic syndrome (D+HUS) require kidney replacement therapy (KRT). In these patients, dehydration worsens disease prognosis. We evaluated dialysis requirement, presence of seizures, and mortality rate among patients diagnosed with D+HUS treated with volume expansion (VE) versus fluid restriction (FR). METHODS: Thirty-five patients with D+HUS were enrolled; 16 received VE and 19 were historical patients who received conventional FR. RESULTS: Upon admission or during treatment, neither group presented evidence of fluid overload. The VE group received higher volumes of saline (VE 27 ml/kg [10-30] over a 3-h period vs. FR 0 ml), had higher urine output after 12 h (VE vs. FR: OR 6.2 [1.2-41.6], P = 0.03), and required less dialysis (VE 2 [12.5%, CI 95% 0-29] vs. FR 9 [47.4%, CI 95% 24-70], P = 0.035). The VE group had an absolute risk reduction of 0.34 (CI 95% 0.07-0.63); hence, three patients treated with VE were required to avoid one KRT. VE also corrected initial hyponatremia and maintained serum sodium within normal ranges. No statistical differences were observed regarding number of patients with seizures (P = 0.08) or mortality (P = 1.0). CONCLUSIONS: VE markedly reduces the number of patients requiring KRT and keeps serum sodium within a normal range. We propose to initially hydrate every patient with D+HUS and without signs of fluid overload, with 10 ml/kg/h 0.9% saline solution IV, over a 3-h period. Afterwards, if urine output is ≥ 0.5 ml/kg/h, it is recommended to not dialyze and continue IV hydration schedule with isotonic (D5) saline solution, according to their needs.

Utilidad de la terapia de acuaféresis / Aquapheresis: ¿works?

Resumen La terapia de acuaféresis ha sido estudiada como una herramienta terapéutica para pacientes con sobrecarga de volumen refractaria al tratamiento con diuréticos de asa. Su objetivo principal es mitigar el impacto clínico de esta sobrecarga en los pacientes con insuficiencia cardiaca descompensada y SCR, reconociendo de esta manera los balances acumulados positivos en los pacientes críticamente enfermos como un factor independiente de mortalidad. Se realizó una búsqueda en las principales bases de datos científicas sobre la terapia de acuaféresis. Se incluyeron guías de manejo, ensayos clínicos controlados, revisiones sistemáticas y metaanálisis. Las bases bibliográficas que arrojaron resultados relevantes fueron Web of Sciences, Scopus, PubMed y SciELO y en total se encontraron 47 referencias bibliográficas publicadas entre 2005 y 2017. La acuaféresis es una terapia de ultrafiltración patentada que mejora la sobrecarga refractaria en pacientes con insuficiencia cardiaca congestiva. Hay brechas en el conocimiento en relación a su costo-efectividad, a los eventos adversos graves que se le atribuyen y a los candidatos que beneficia, por tanto, se requieren más estudios de calidad para llegar a conclusiones sólidas. Hasta el momento no hay evidencia contundente que respalde el uso sistemático y rutinario de la terapia de acuaféresis en las unidades de cuidado intensivo.

Abstract The therapy of Aquapheresis has been studied as a therapeutic tool for patients with volume overload refractory to treatment with ASA diuretics, whose main objective is to mitigate the clinical impact of the same in patients with decompensated heart failure and cardiorenal syndrome, recognizing positive cumulative balances in critically ill patients as a factor regardless of mortality. A search was made in the main scientific databases for review articles, and studies that included the Acuapheresis strategy. Bibliographic references were found in databases from 2005 to 2017. Aquapheresis therapy is a patented ultrafiltration therapy aimed at improving refractory overload in patients with congestive heart failure. There are gaps in knowledge regarding cost-effectiveness therapy, real adverse adverse event relationships attributable to it and candidates will benefit, and we believe that more quality studies are required to reach solid conclusions. So far there is no compelling evidence to support Aquapheresis therapy to implement its routine and routine use of the ICU.

Early fluid overload is associated with mortality and prolonged mechanical ventilation in extremely low birth weight infants.

Recent studies revealed that fluid overload is associated with higher mortality in critically ill children and adults. This study aimed to evaluate the association between fluid overload in the first 3 days of life and mortality in extremely low birth weight infants. This single-center retrospective cohort study included two hundred nineteen newborns with birth weight less than 1000 g who were admitted to the neonatal intensive care between January 2012 and December 2017. Overall mortality was 32.4%, the median gestational age was 27.3 (26.1-29.4) weeks, and birth weight was 770 (610-900) grams. In the group with severe fluid overload, we found a higher rate of deaths (72.2%); mean airway pressure was significantly higher and with longer invasive mechanical ventilation necessity.Conclusion: Early fluid overload in extremely low birth weight infants is associated with higher mortality rate, higher mean airway pressure in invasive mechanically ventilated patients, and longer mechanical ventilation duration in the first 7 days of life. What is Known: • Fluid overload is associated with a higher mortality rate and prolonged mechanical ventilation in children and adults. What is New: • Fluid overload in the first 72 h of life in an extremely premature infant is associated with higher mortality rate, higher mean airway pressure in invasive mechanically ventilated patients, and longer mechanical ventilation duration the first 7 days of life.

Association between extracellular volume control and survival in patients on short daily haemodialysis.

BACKGROUND: Fluid overload (FO) assessed by bioimpedance spectroscopy (BIS) is associated with higher mortality risk in maintenance haemodialysis (HD). The aim was to assess if a better management of FO through short daily haemodialysis (SDHD) could improve survival. METHODS: Retrospective analysis of patients who were on HD 3 sessions/week for at least 3 months and shifted to in-centre SDHD (5 or 6 sessions/week, 2 to 3 h/session) between July 2012 and June 2016 at 23 dialysis units in Brazil. The 12-month risk of death was analysed according to the predialysis hydration status measured before and 6 months after initiation of SDHD. Predialysis hydration status was considered adequate when FO ≤15% of extracellular volume. RESULTS: A total of 297 patients on SDHD were included in the analysis. Their median age was 57 (IQR 45-67) years, 62% were males, 44% diabetics, 57% on 6 dialysis sessions/week, with a median session duration of 130 (IQR 120-150) minutes. BIS assessment at initiation of the SDHD regimen was performed in 220 patients and FO > 15% was found in 46.4%. Twelve-month survival rates for those with FO ≤15 and > 15% before initiating SDHD were 87.4 and 88.0%, respectively (P = 0.92). BIS analysis when completing 6 months on SDHD were available for 229 patients, 26.6% with FO > 15%. The survival rates for the next 12 months (from the 6th to the 18th month of follow-up) for those with FO ≤15 and > 15% were 91.0 and 72.0%, respectively (P = 0.0006). In a Cox regression model, after adjustment for demographic, clinical and laboratory variables, FO ≤ 15% persisted associated with a lower mortality risk (hazard ratio 0.34, 95%CI 0.13-0.87). CONCLUSIONS: Moving from conventional HD to SDHD was associated with better control of excessive extracellular volume. Patients who reached or maintained predialysis fluid overload ≤15% after initiating SDHD presented a lower risk of death.

[Des-resuscitation in the overload of fluids associated with acute kidney injury]. / Des-resucitación en la sobrecarga de fluidos asociada a la lesión renal aguda.

In the last few years the general results in the treatment of acute kidney injury has improved constantly, without a complete comprehension of its pathophysiology. With this paradigm in mind, in these last few years we have seen an evolving comprehension of the possible answers that may be based on recognizing the more proactive role of fluid management in the resuscitation of critical patients, not limited only to the delivery of fluids, but also to their active removal, having as the principal objective the improvement of tissue perfusion. The key role of vascular integrity in fluid overload is discussed, emphasizing the role of the endothelial glycocalyx. Active desresuscitation maneuvers with diuretics or with renal support therapies could be increasingly recognized instruments in the management of fluid overload, particularly in those patients with acute kidney injury.

Los resultados generales del tratamiento de la lesión renal aguda en los últimos años han mejorado casi de manera constante, aunque sin una comprensión completa de su fisiopatología. La respuesta a este interrogante radicaría en la comprensión del rol proactivo en lo que hace a la administración / remoción de los fluidos, abarcando todo el proceso de reanimación de los pacientes críticos, es decir no limitándose a la administración sino también al momento oportuno de la remoción de los mismos, buscando como principal objetivo mejorar la perfusión tisular. Se discute entre otros el papel clave que ejerce la integridad vascular en la sobrecarga de fluidos, haciendo hincapié en el papel del glicocálix endotelial. Las maniobras de des-resucitación activa con diuréticos o con terapias de soporte renal, podrían ser instrumentos cada vez más reconocidos en la aplicación de la sobrecarga de fluidos, en particular en aquellos pacientes con lesión renal aguda.