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Introduction In continuous renal replacement therapy (CRRT), regional citrate anticoagulation offers an attractive alternative to heparinization, especially in patients with a high bleeding risk since they do not have to [...], Background In continuous renal replacement therapy (CRRT), regional citrate anticoagulation offers an attractive alternative to heparinization, especially for children with a high bleeding risk. Methods We report on a new management approach to CRRT using integrated citrate software and physiological sodium concentration solutions. Convective filtration was performed with pre-filter citrate anticoagulation using an 18 mmol/L citrate solution and a post-filter replacement fluid. The citrate flow rate was automatically adjusted to the blood flow rate by means of integrated citrate software. Similarly, calcium was automatically infused into children to maintain their blood calcium levels within normal range. Results Eleven CRRT sessions were performed (330 h) in seven critically ill children aged 3-15 years (extreme values 15-66 kg). Disease categories included sepsis withmultiorgan dysfunction (n=2) and hemolytic uremic syndrome (n=5). Median effluent dose was 2.1 (extreme values 1.7-3.3) L/h/ 1.73 [m.sup.2]. No session had to be stopped because of metabolic complications. Calcium levels, both in the circuits and in the circulating blood of the children, remained stable and secure. Conclusions Regional citrate anticoagulation can be used in children with a body weight of >15 kg using integrated citrate software and commercially available solutions with physiological sodium concentrations in a safe, effective and convenient procedure. Keywords Continuous venovenous hemofiltration * Children * Citrate anticoagulation * Acute kidney injury * Continuous renal replacement therapy * Pediatric intensive care

Children supported by extracorporeal membrane oxygenation present a high risk of neurological complications. Although carotid cannulation is known to be associated with neurologic injury, conflicting data exist with regard to the predominance of right- or left-sided lesions. We describe here two infants requiring veno-arterial extracorporeal membrane oxygenation for septic shock who encountered right watershed infarction ipsilateral to carotid artery cannulation. Hemodynamic failure seems to be the most probable underlying mechanism. The asymmetry of transcranial Doppler metrics in one case and the low right regional cerebral oxygen saturation value observed soon after right cannulation in both cases suggest an insufficient cerebral collateral flow compensation. The risk of ipsilateral watershed injury should be considered before cervical cannulation, notably in the context of sepsis and an evaluation of the cerebral collateral blood flow before and just after cannulation may be interesting in order to identify infants with higher risk of ipsilateral ischemic lesions. [ABSTRACT FROM AUTHOR]

Background Methods Results Conclusion Sickle cell disease (SCD) is a global hemoglobinopathy; approximately 300 000 individuals are diagnosed annually. Acute chest syndrome (ACS), a common complication, leads to significant hospitalization and mortality, particularly in cases of severe respiratory distress. ECMO outcomes in this specific population are poorly described.This retrospective observational study, utilizing data from the Extracorporeal Life Support Organization (ELSO) registry, focuses on children and young adults (<40 years) with SCD undergoing ECMO from 1998 to 2022.We observed a growing trend in ECMO cases over the last 15 years, with 210 SCD patients identified in the registry (five neonates, 95 children, 110 adults). ECMO was predominantly initiated for pulmonary support (62%), and most of the primary diagnoses were related to SCD (reported as “SCD” or “acute chest syndrome”). The global survival rate was 55.8% (59% for children and 52.7% for adults). None of the children supported for extracorporeal cardiopulmonary resuscitation survived, and only 2/18 (11%) of adults cannulated for ECPR survived. Complication rates, including acute renal failure (33.8%) neurological events (13%), thrombotic (23.3%), or bleeding events (22.9%) were not noticeably different from reported outcomes in the ELSO registry.Our findings suggest that ECMO outcomes in SCD patients align with general ECMO trends and may not be limited by suspected unfavorable results in children and young adults. Despite limitations, our study contributes valuable insights into using ECMO in SCD, emphasizing the need for further research and understanding in this underexplored domain. [ABSTRACT FROM AUTHOR]

Donor-specific anti-HLA antibodies (DSAs) are a major risk factor associated with renal allograft outcomes. As a trigger of B cell antibody production, T follicular helper cells (Tfhs) promote DSA appearance. Herein, we evaluated whether circulating Tfhs (cTfhs) are associated with the genesis of antibody-mediated rejection. We measured cTfh levels on the day of transplantation and 1 year after transplantation in blood from a prospective cohort of 237 renal transplantation patients without DSA during the first year post-transplantation. Total cTfhs were characterized as CD4+CD45RA−CXCR5+, and the three following subsets of activated cTfh were analyzed: CXCR5+PD1+, CXCR5+PD1+ICOS+, an CXCR5+PD1+CXCR3−. Immunizing events (previous blood transfusion and/or pregnancy) and the presence of class II anti-HLA antibodies were associated with increased frequencies of activated CXCR5+PD1+, CXCR5+PD1+ICOS+, and CXCR5+PD1+CXCR3− cTfh subsets. In addition, ATG-depleting induction and calcineurin inhibitor treatments were associated with a relative increase of activated cTfh subsets frequencies at 1 year post-transplantation. In multivariate survival analysis, we reported that a decrease in activated CXCR5+PD1+ICOS+ at 1 year after transplantation in the blood of DSA-free patients was significantly associated with the risk of developing de novo DSA after the first year (p = 0.018, HR = 0.39), independently of HLA mismatches (p = 0.003, HR = 3.79). These results highlight the importance of monitoring activated Tfhs in patients early after transplantation and show that current treatments cannot provide early, efficient prevention of Tfh activation and migration. These findings indicate the need to develop innovative treatments to specifically target Tfhs to prevent DSA appearance in renal transplantation. [ABSTRACT FROM AUTHOR]

In patient 1, the aEEG background activity exhibited a continuous normal voltage at PICU admission before cardiac arrest and a discontinuous background pattern immediately after ECPR that reflected a moderately abnormal trace (A). Pediatric extracorporeal cardiopulmonary resuscitation (ECPR), which is used for refractory cardiac arrest, has a higher survival rate than conventional cardiopulmonary resuscitation.1 The neurological outcome remains, however, one of the main concerns highlighting the need for a multimodal prognostic approach.2 We recently reported that amplitude-integrated electroencephalography (aEEG) could be useful for neurological prognostication after pediatric cardiac arrest.3 There is, however, a paucity of data regarding this monitoring during ECPR. In patient 2, the aEEG background activity was moderately abnormal before the cardiac arrest but severely abnormal after ECPR, with persistent flat trace (B). [Extracted from the article]