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Background Acute kidney Injury (AKI) in children undergoing cardiac surgery (CS) is strongly associated with hospital morbidity. Post-discharge CS AKI outcomes are less clear. We evaluated associations between AKI and post-discharge (a) healthcare utilization, (b) chronic kidney disease (CKD) or hypertension and (c) mortality. Methods This is a retrospective two-centre cohort study of children surviving to hospital discharge after CS. Primary exposures were post-operative [greater than or equal to]Stage 1 AKI and [greater than or equal to]Stage 2 AKI defined by Kidney Disease Impoving Global Outcomes. Association of AKI with time to outcomes was determined using multivariable Cox-Proportional Hazards analysis. Results Of 350 participants included (age 3.1 (4.5) years), 180 [51.4%] developed AKI and 60 [17.1%] developed [greater than or equal to]Stage 2 AKI. Twenty-eight (9%) participants developed CKD or hypertension (composite outcome), and 17 (5%) died within 5 years of discharge. Post-operative [greater than or equal to]Stage 1 and [greater than or equal to]Stage 2 AKI were not associated with post-discharge hospitalizations, emergency room (ER) visits, physician visits or CKD or hypertension in adjusted analyses. A trend was observed between [greater than or equal to]Stage 2 AKI and mortality but was not statistically significant. In unadjusted stratified analyses, AKI was associated with post-discharge hospitalizations in children with RACHS-1 score [greater than or equal to]3, complex chronic disease classification and children living in urban areas. Conclusions Post-CS AKI is not associated with post-discharge healthcare utilization, death and CKD or hypertension, though it may be associated with healthcare utilization in more complex paediatric CS children. Studies should aim to better understand post-CS healthcare utilization patterns and non-AKI risk factors for CKD, hypertension and mortality, to reduce adverse long-term outcomes after CS., Author(s): Sophia Nunes [sup.1] , Erin Hessey [sup.1] [sup.2] , Marc Dorais [sup.3] , Sylvie Perreault [sup.4] , Philippe Jouvet [sup.5] , Véronique Phan [sup.6] , Jacques Lacroix [sup.5] , [...]

Background Baseline serum creatinine (bSCr) is required for diagnosing acute kidney injury (AKI). In children, bSCr is commonly defined as the lowest measurement within 3 months of admission. Measured values are often missing and estimating bSCr using height-based glomerular filtration rate (GFR) equations is problematic when height is unavailable. Methods This is a retrospective cohort study including 538 children admitted to the intensive care unit (ICU) between 2003 and 2005 at two centers in Canada, with measured bSCr, height, and ICU-SCr values. We evaluated the bias, accuracy, and precision of back-calculating bSCr from height-dependent and height-independent GFR equations. Agreement of AKI defined using measured and estimated bSCr was calculated. Multivariate analyses were performed to assess the impact of bSCr estimation methods on the association between AKI and ICU mortality, length of stay, and duration of mechanical ventilation. Results Both methods underestimated bSCr by 1-3%, showed good accuracy (~30% of patients with estimated bSCr within 10% of measured bSCr), but poor precision (wide 95% limits of agreement). The agreement between AKI defined by estimated versus measured bSCr was >80% ([kappa] >0.5). The height-independent method performed best in children >13 years old; however, overall, both methods performed similarly across age subgroups. AKI was associated with longer stay, prolonged mechanical ventilation, and ICU mortality using measured and estimated bSCr. Conclusions Height-dependent and height-independent bSCr estimation methods were comparable. This may have significant implications for performing pediatric AKI research using large databases, and in clinical care to define AKI when height is unknown., Author(s): Erin Hessey [sup.1] , Rami Ali [sup.2] [sup.3] , Marc Dorais [sup.4] , Geneviève Morissette [sup.5] , Michael Pizzi [sup.1] , Nikki Rink [sup.7] , Philippe Jouvet [sup.6] , [...]

Background Supportive care as a bridge to transplant or recovery remains challenging in children suffering from acute liver failure (ALF). We report our experience in children using the Molecular Absorbent Recirculating System (MARS®). Methods Retrospective data from children receiving therapy using MARS® from October 2009 to October 2012 were included in this single-center retrospective study. Patient characteristics, clinical presentation and complications of ALF, clinical and biological data before and after each MARS® session, technical modalities and adverse events were recorded. Results A total of six children underwent 17 MARS® sessions during the study period. Two adolescents were treated with the adult filter MARSFLUX® and four infants were treated with the MiniMARS® filter. The mean PEdiatric Logistic Dysfunction (PELOD) score at admission was 19 (range 11-33). All patients were mechanically ventilated, and four had acute kidney injury. The neurological course improved in one case, judged as stable in two cases and worsened in one case; data were unavailable in two cases. Mean serum ammonia levels decreased significantly following treatment with MARS® from an initial 89 ± 29 to 58 ± 35 mcmol/L (p = 0.02). No other significant biological improvement was observed. Hemodynamic status improved/remained unchanged in the adolescent group, but in the infants four of the seven sessions were poorly tolerated and two sessions were aborted. Three patients died, two were successfully transplanted and one recovered without transplantation. Conclusion In our experience, treatment with MARS® is associated with encouraging results in adolescents, but it needs modification for very sick infants to improve tolerance. Keywords: Children * Acute liver failure * Molecular Absorbant Recycling System (MARS®) * Clinical experience, Introduction Acute liver failure (ALF) in children is defined as a multisystem disorder that includes severe impairment of liver function [1]. In contrast with the adult definition, in which encephalopathy [...]

Abstract Maple syrup urine disease (MSUD, MIM 248600) can be complicated by metabolic crises necessitating extracorporeal removal therapy (ECRT). Since leucine levels are usually not immediately available during therapy, an [...]