Early Initiation Of Renal Replacement Therapy Research Articles

Differential effect on mortality of the timing of initiation of renal replacement therapy according to the criteria used to diagnose acute kidney injury: an IDEAL-ICU substudy

BackgroundThis substudy of the randomized IDEAL-ICU trial assessed whether the timing of renal replacement therapy (RRT) initiation has a differential effect on 90-day mortality, according to the criteria used to diagnose acute kidney injury (AKI), in patients with early-stage septic shock.MethodsThree groups were considered according to the criterion defining AKI: creatinine elevation only (group 1), reduced urinary output only (group 2), creatinine elevation plus reduced urinary output (group 3). Primary outcome was 90-day all-cause death. Secondary endpoints were RRT-free days, RRT dependence and renal function at discharge. We assessed the interaction between RRT strategy (early vs. delayed) and group, and the association between RRT strategy and mortality in each group by logistic regression.ResultsOf 488 patients enrolled, 205 (42%) patients were in group 1, 174 (35%) in group 2, and 100 (20%) in group 3. The effect of RRT initiation strategy on 90-day mortality across groups showed significant heterogeneity (adjusted interaction p = 0.021). Mortality was 58% vs. 42% for early vs. late RRT initiation, respectively, in group 1 (p = 0.028); 57% vs. 67%, respectively, in group 2 (p = 0.18); and 58% vs. 55%, respectively, in group 3 (p = 0.79). There was no significant difference in secondary outcomes.ConclusionThe timing of RRT initiation has a differential impact on outcome according to AKI diagnostic criteria. In patients with elevated creatinine only, early RRT initiation was associated with significantly increased mortality. In patients with reduced urine output only, late RRT initiation was associated with a nonsignificant, 10% absolute increase in mortality.

Early strategy vs. late initiation of renal replacement therapy in adult patients with acute kidney injury: an updated systematic review and meta-analysis of randomized controlled trials.

The optimal time to start renal replacement therapy (RRT) for acute kidney injury (AKI) remains controversial. We aim to compare the effects of early vs. delayed RRT initiation on clinical outcomes in adult patients with AKI. PubMed, Embase, Cochrane Library, Web of Science, Chinese Biomedical Literature Database, ClinicalTrials.gov, and the International Clinical Trial registry platform were systematically searched from inception to 7 August 2022. The review included randomized clinical trials (RCTs) comparing early and delayed initiation of RRT in AKI patients. The selected primary outcomes were short-term and long-term mortality. Secondary outcomes included RRT dependency, intensive care unit (ICU) length of stay, hospital length of stay, mechanical ventilator-free days, vasoactive agents-free days, RRT-free days, and adverse events. Overall, 15 RCTs, including 5,625 patients, were analyzed. Early RRT showed no survival benefit when compared to the delayed therapy (28-or 30-day mortality: RR, 1.01, 95% CI: 0.94-1.08, p = 0.87; 60-day mortality: RR, 0.87, 95% CI: 0.71-1.06, p = 0.16; 90-day mortality: RR, 1.00, 95% CI: 0.88-1.13, p = 0.97; in-hospital mortality: RR, 1.05, 95% CI: 0.88-1.24, p = 0.58; ICU mortality: RR, 1.00, 95% CI: 0.91-1.10, p = 0.98). The delayed RRT did not lead to a higher risk of RRT dependency, ICU, or hospital length of stay than the early RRT. Similarly, early initiation of RRT did not lead to longer ventilator-free, vasoactive agent-free, and RRT-free days. However, early RRT initiation was associated with more adverse events. Our study suggested that early RRT initiation was not associated with survival benefits or better clinical outcomes and increased the risk of RRT-associated adverse events. Current evidence does not support the use of early RRT for AKI patients without urgent indications.

Impact of renal replacement therapy strategy on beta-lactam plasma concentrations: the BETAKIKI study—an ancillary study of a randomized controlled trial

BackgroundSepsis prognosis correlates with antibiotic adequacy at the early phase. This adequacy is dependent on antibacterial spectrum, bacterial resistance profile and antibiotic dosage. Optimal efficacy of beta-lactams mandates concentrations above the minimal inhibitory concentration (MIC) of the targeted bacteria for the longest time possible over the day. Septic acute kidney injury (AKI) is the most common AKI syndrome in ICU and often mandates renal replacement therapy (RRT) initiation. Both severe AKI and RRT may increase outside target antibiotic concentrations and ultimately alter patient’s prognosis.Patients and methodsThis is a secondary analysis of a randomized controlled trial that compared an early RRT initiation strategy with a delayed one in 620 critically ill patients undergoing severe AKI (defined by KDIGO 3). We compared beta-lactam trough concentrations between the two RRT initiation strategies. The primary outcome was the proportion of patients with sufficient trough plasma concentration of beta-lactams defined by trough concentration above 4 times the MIC. We hypothesized that early initiation of RRT could be associated with an insufficient antibiotic plasma trough concentration compared to patients allocated to the delayed strategy.ResultsOne hundred and twelve patients were included: 53 in the early group and 59 in the delayed group. Eighty-three patients (74%) had septic shock on inclusion. Trough beta-lactam plasma concentration was above 4 times the MIC breakpoint in 80.4% (n = 90) of patients of the whole population, without differences between the early and the delayed groups (79.2% vs. 81.4%, respectively, p = 0.78). On multivariate analysis, the presence of septic shock and a higher mean arterial pressure were significantly associated with a greater probability of adequate antibiotic trough concentration [OR 3.95 (1.14;13.64), p = 0.029 and OR 1.05 (1.01;1.10), p = 0.013, respectively). Evolution of procalcitonin level and catecholamine-free days as well as mortality did not differ whether beta-lactam trough concentration was above 4 times the MIC or not.ConclusionsIn this secondary analysis of a randomized controlled trial, renal replacement therapy initiation strategy did not significantly influence plasma trough concentrations of beta-lactams in ICU patients with severe AKI. Presence of septic shock on inclusion was the main variable associated with a sufficient beta-lactam concentration.Trial registration: The AKIKI trial was registered on ClinicalTrials.gov (Identifier: NCT01932190) before the inclusion of the first patient.

EARLY INITIATION OF RENAL REPLACEMENT THERAPY IN INTENSIVE CARE UNIT PATIENTS WITH BOTH ACUTE RESPIRATORY DISTRESS SYNDROME AND SEPSIS WITH OR WITHOUT RENAL FAILURE: A RETROSPECTIVE COHORT STUDY BASED ON PROPENSITY SCORE MATCHING.

Background: It is unknown whether early renal replacement therapy (RRT) initiation strategy in intensive care unit (ICU) patients with both acute respiratory distress syndrome (ARDS) and sepsis with or without renal failure is clinically beneficial. Patients and methods: A total of 818 patients with both ARDS and sepsis admitted to the ICU of Tianjin Medical University General Hospital were included in the analysis. Early RRT was defined as initiating the RRT strategy within 24 h of admission. The relationship between early RRT and clinical outcomes, including primary (30-day mortality) and secondary (90-day mortality, serum creatinine, Pa o2 /Fi o2 , duration of invasive mechanical ventilation, cumulative fluid output, and cumulative fluid balance) outcomes, was compared using propensity score matching (PSM). Results: A total of 277 patients (33.9% of the total population) underwent an early RRT initiation strategy before PSM. After PSM, a cohort of 147 patients with early RRT and 147 patients without early RRT with matched baseline characteristics (including serum creatinine at admission) were constructed. Early RRT was not significantly associated with 30- (hazard ratio [HR], 1.25; 95% confidence interval [CI], 0.85-1.85; P = 0.258) or 90-day mortality (HR, 1.30; 95% CI, 0.91-1.87, P = 0.150). At each time point within 72 h after admission, there was no significant difference in serum creatinine, Pa o2 /Fi o2 and duration of mechanical ventilation between the early and the no early RRT groups. Early RRT significantly increased total output at all time points within 72 h of admission and reached a statistically significant negative fluid balance at 48 h. Conclusions: Early RRT initiation strategies had no statistically significant survival benefit in ICU patients with both ARDS and sepsis, with or without renal failure, nor did they significantly improve serum creatinine and oxygenation or shorten the duration of mechanical ventilation. The use and timing of RRT in such patients should be thoroughly investigated.

Comparison of early and delayed strategy for renal replacement therapy initiation for severe acute kidney injury with heart failure: a retrospective comparative cohort study.

Determining the timing of renal replacement therapy (RRT) in patients with acute kidney injury (AKI) and heart failure (HF) can optimize the clinical management strategy. We compared the impact of "early" and "delayed" timing of RRT on the prognosis of patients with AKI and HF. Clinical data from September 2012 to September 2022 were retrospectively analyzed. Patients with AKI complicated by HF and undergoing RRT in the intensive care unit (ICU) were enrolled. Patients with stage 3 AKI and fluid overload present (FOP) or who met the emergency indications for RRT were assigned to the delayed RRT group. Patients with stage 1 AKI or stage 2 AKI and without urgent indications for RRT and patients with stage 3 AKI without FOP and without urgent indications for RRT were enrolled in the Early RRT group. At 90-day follow-up after initiation of RRT, the mortality was compared between the two groups. Logistic regression analysis was performed to adjust for confounding factors affecting 90-day mortality. A total of 151 patients were enrolled, including 77 in the early RRT group and 74 in the delayed RRT group. For baseline characteristics, patients in the early RRT group had significantly lower acute physiology and chronic health evaluation-II (APACHE-II) score, sequential organ failure assessment (SOFA), serum creatinine (Scr) values and blood urea nitrogen (BUN) values on the day of ICU admission than those in the delayed RRT group (both P values <0.05), there were no significant differences in other baseline characteristics. The number of RRT-free days in the ICU was significantly longer in the early RRT group than in the delayed RRT group [1.69 (0.35-10.87) vs. 0.88 (0.20-4.55) days; P=0.046]. However, clinical outcomes (except for the number of RRT-free days) and complications showed no significant differences between these 2 groups (all P values >0.05). Multivariate binary logistic regression analysis showed early initiation of RRT was not an independent risk factor for increased 90-day mortality [odds ratio (OR): 0.671; 95% confidence interval (CI): 0.314-1.434; P=0.303]. Early initiation of RRT is not recommended to reduce mortality in AKI patients with HF.

Timing of initiation of renal replacement therapy for patients with acute kidney injury: A meta-analysis of RCTs.

To assess the effects of delayed versus early renal replacement therapy (RRT) initiation for patients with AKI. Related RCTs of RRT initiated at different times published on PubMed, Web of Science, Embase, and Cochrane Library were searched. Fifteen RCTs studies with 5395 patients were included. The results showed that the 28-day mortality (RR 1.01; 95% CI 0.94 ~ 1.08; p=0.80), 60-day mortality (RR 1.00; 95% CI 0.91 ~ 1.11; p=0.93), 90-day mortality (RR 1.01; 95% CI 0.94 ~ 1.08; p=0.80), dialysis dependence among survivors (RR 0.67; 95% CI 0.40 ~ 1.13; p=0.13), length of ICU stay (RR -1.32; 95% CI -3.26 ~ 0.62; p=0.18) and length of hospital stay among survivors(RR -0.98; 95% CI -2.89 ~ 0.92; p=0.31) were not significantly different between the two groups. In addition, early initiation of RRT increases the incidence of hypotension (RR 1.42, 95% CI 1.23 ~ 1.63; p< 0.00001) and infectious (RR 1.36; 95% CI 1.03 ~ 1.80; p=0.03) events. Early initiation of RRT cannot improve the prognosis and benefit patients.

Early versus delayed initiation of renal replacement therapy in cardiac-surgery associated acute kidney injury: an economic perspective.

Timing for renal replacement therapy (RRT) initiation for cardiac-surgery associated acute kidney surgery (CSA-AKI) is subject to debate. Evidence suggests earlier initiation leads to shorter length of stay (LoS). We investigated differences in healthcare costs associated with timing of RRT initiation in CSA-AKI. A cost-consequences model compared costs of Early (<24 h) vs. Delayed (>24 h) RRT initiation. Data were from the ELAIN trial in Germany, and the HiDenIC database, a US multi-hospital database. Resource utilization was determined by RRT duration, ICU, and hospital LoS. All resources were costed from a US healthcare perspective. Extensive sensitivity analyses (SA) were conducted, notably regarding the proportion of patients not initiated on RRT with the Delayed strategy. Early RRT initiation exhibited cost savings compared to Delayed RRT initiation. With ELAIN data, savings reached -$122,188 (ranging from -$157,707 to -$74,763 in the SA). Findings were confirmed with HiDenIC data; Early RRT initiation showed savings of -$77,303 (ranging from -$108,971 to -$47,012 in the SA). Our costing model indicates that Early RRT initiation for CSA-AKI may result in appreciable cost savings. Delaying RRT, in the setting of CSA-AKI, may lead to longer LoS and increased healthcare costs.

MO346: Timing of Renal Replacement Therapy Initiation in Patients With Septic Acute Kidney Injury: A Systematic Review and Meta-Analysis

Abstract BACKGROUND AND AIMS To evaluate the optimal timing of renal-replacement therapy (RRT) initiation with a systemic review and meta-analysis in the patients with septic acute kidney injury (AKI). METHOD Systemic searches of PubMed, Cochrane and Embase databases from their inception to June 2021 were investigated. Studies that reported original data that specifically mentioned applying RRT in septic patients with AKI were selected. And, full-text reviews were performed by two reviewers independently with the following eligibility criteria: (1) observational cohort and/or randomized clinical trial (RCT) design; (2) adult septic patients; (3) diagnosis of AKI; (4) description of factors related to the timing of RRT initiation; and (5) description of mortality outcomes. RESULTS Among a total of six studies including 1058 patients, the 28-day mortality rate was significantly lower in the early RRT-treated group compared with the late group [RR = 0.69; 95% confidence interval (95% CI) (0.51–0.94); P = 0.018]. Moreover, among the five studies including 938 patients, the 90-day mortality rate was also significantly lower in the early RRT-treated group than in the late group [RR = 0.61; 95% CI (0.47–0.80); P = 0.01]. In a subgroup analysis for continuous RRT (CRRT), we also found significantly lower 28- and 90-day mortality rates in the early CRRT-treated group compared with the late group. CONCLUSION This study showed that early initiation of RRT might reduce 28- and 90-day mortality compared with late initiation in septic AKI patients.

Identifying the optimal timing of renal replacement therapy initiation among critically ill patients on extracorporeal membrane oxygenation therapy

Introduction: Acute kidney injury (AKI) is one of the most frequent complications in patients with severe cardiopulmonary dysfunction on extracorporeal membrane oxygenation (ECMO) therapy. Although renal replacement therapy (RRT) is the standard of care for AKI, the timing of initiation of RRT remains controversial. Objectives: This study aimed to determine the optimal timing of RRT initiation among patients receiving ECMO therapy. Patients and Methods: We conducted a retrospective cohort study of 40 patients in a tertiary hospital centre from March 2014 until December 2019. The patients were divided into two groups according to the timing of RRT initiation, i.e. early RRT (within 72 hours) or late RRT after ECMO treatment. The primary outcome was 60-day mortality. The secondary outcomes were survival predictors of these patients. Results: The 60-day mortality was not significantly different between the two groups (76.9% in the early RRT initiation and 88.9% in the late group; P=0.321). The predictors of survival were RRT start within 72 hours of ECMO initiation (HR: 0.067, 95%, CI: 0.010-0.457), age ≥ 60 years (HR: 6.334, 95% CI: 1.268-31.625), fluid balance on day seven of ECMO (HR: 1.093, 95% CI: 1.007-1.187), and eGFR-EPI ≥ 60 mL/min/1.73 m2 (HR: 0.970, 95% CI: 0.946-0.996). Conclusion: Among patients with ECMO and RRT, early RRT within 72 hours of ECMO initiation was significantly associated with a decreased risk of death. Our findings suggest the survival benefit of early RRT in critically ill patients treated with ECMO.

Timing of renal-replacement therapy in intensive care unit-related acute kidney injury.

The optimal timing of renal-replacement therapy (RRT) initiation for the management of acute kidney injury (AKI) in the intensive care unit (ICU) is frequently controversial. An earlier-strategy has biological rationale, even in the absence of urgent indications; however, a delayed-strategy may prevent selected patients from receiving RRT and avoid complications related to RRT. Previous studies assessing the optimal timing of RRT initiation found conflicting results, contributing to variation in clinical practice. The recent multinational trial, standard vs. accelerated initiation of renal replacement therapy in acute kidney injury (STARRT-AKI) found no survival benefit and a higher risk of RRT dependence with an accelerated compared to a standard RRT initiation strategy in critically ill patients with severe AKI. Nearly 40% of patients allocated to the standard-strategy group did not receive RRT. The Artificial Kidney Initiation in Kidney Injury-2 (AKIKI-2) trial further assessed delayed compared to more-delayed strategies for RRT initiation. The more-delayed strategy did not confer an increase in RRT-free days and was associated with a higher risk of death. Early preemptive initiation of RRT in critically ill patients with AKI does not confer clear clinical benefits. However, protracted delays in RRT initiation may be harmful.

PUK7 Economic Analysis of the Impact of Intensive Urine Output Monitoring (IUOM) Upon Early Detection of Acute Kidney Injury (AKI) and Intensive Care Unit Length of Stay (ICU LOS)

IUOM – defined as hourly recording of urine output – has been associated with early detection of AKI. Early initiation of renal replacement therapy (RRT) in AKI patients has been associated with reduced ICU LOS. This analysis estimates the economic impact, per patient, of applying IUOM with a goal of accelerating the detection of AKI, and the subsequent early initiation of RRT, to shorten ICU LOS.

Early versus Late Initiation of Renal Replacement Therapy: Have We Reached the Consensus? An Updated Meta-Analysis

Objectives: The objective of this study is to compare early versus late/standard initiation of renal replacement therapy (RRT) in patients with acute kidney injury (AKI). Data Sources: MEDLINE/PubMed, Embase, Google Scholar, Cochrane Central Register of Controlled Trials, and the Cochrane renal group till August 15, 2020. Study Selection: Randomized controlled trials (RCTs) comparing early versus late initiation of RRT in patients with AKI were included. The primary outcome measures were all-cause mortality and dialysis dependence on day 90. Secondary outcome measures were length of stay, recovery of renal functions, and adverse events. Data Extraction: Two authors independently performed study selection and data extraction using data extraction forms. Data Synthesis: A total of 14 RCTs with 5,234 participants were included. Three trials had low risk of bias in all the domains. There was no significant difference in the overall mortality (risk ratio (RR): 0.99; 95% confidence interval (CI): 0.89, 1.10; moderate certainty of evidence), day 30 mortality (RR: 1.0; 95% CI: 0.91, 1.09; high certainty of evidence), day 90 mortality (RR: 1.00; 95% CI: 0.88, 1.13; high certainty of evidence), and ICU mortality (RR: 1.00; 95% CI: 0.90, 1.10; moderate certainty of evidence) between the early versus late RRT. Dialysis dependence on day 90 was significantly higher in the patients assigned to early RRT (RR: 1.55; 95% CI: 1.15, 2.09; moderate certainty of evidence). The treatment-emergent adverse events (hypophosphatemia and hypotension) were significantly higher in the patients assigned to early RRT. Conclusion: There is no added benefit of early initiation of RRT in patient with AKI; this may lead to treatment-emergent adverse events. Delaying the initiation of RRT with close monitoring and initiating RRT for emergent indications should be the acceptable criterion in critical care nephrology. Prospero Registration: CRD42016043092.

POS-045 EARLY RENAL REPLACEMENT THERAPY MAY REDUCE THE ALL-CAUSE MORTALITY OF SEVERE COVID-19

The efficacy of renal replacement therapy (RRT) remains to be validated in COVID-19. In this respective cohort study, we aimed to assess the efficacy of early initiation of RRT in ICU adults with severe COVID-19.

Timing of renal replacement therapy initiation for acute kidney injury in critically ill patients: a systematic review of randomized clinical trials with meta-analysis and trial sequential analysis

BackgroundAcute kidney injury (AKI) is a common serious complication in critically ill patients. AKI occurs in up to 50% patients in intensive care unit (ICU), with poor clinical prognosis. Renal replacement therapy (RRT) has been widely used in critically ill patients with AKI. However, in patients without urgent indications such as acute pulmonary edema, severe acidosis, and severe hyperkalemia, the optimal timing of RRT initiation is still under debate. We conducted this systematic review of randomized clinical trials (RCTs) with meta-analysis and trial sequential analysis (TSA) to compare the effects of early RRT initiation versus delayed RRT initiation.MethodsWe searched databases (PubMed, EMBASE and Cochrane Library) from inception through to July 20, 2020, to identify eligible RCTs. The primary outcome was 28-day mortality. Two authors extracted the data independently. When the I2 values < 25%, we used fixed-effect mode. Otherwise, the random effects model was used as appropriate. TSA was performed to control the risk of random errors and assess whether the results in our meta-analysis were conclusive.ResultsEleven studies involving 5086 patients were identified. Two studies included patients with sepsis, one study included patients with shock after cardiac surgery, and eight others included mixed populations. The criteria for the initiation of RRT, the definition of AKI, and RRT modalities existed great variations among the studies. The median time of RRT initiation across studies ranged from 2 to 7.6 h in the early RRT group and 21 to 57 h in the delayed RRT group. The pooled results showed that early initiation of RRT could not decrease 28-day all-cause mortality compared with delayed RRT (RR 1.01; 95% CI 0.94–1.09; P = 0.77; I2 = 0%). TSA result showed that the required information size was 2949. The cumulative Z curve crossed the futility boundary and reached the required information size. In addition, early initiation of RRT could lead to unnecessary RRT exposure in some patients and was associated with a higher incidence of hypotension (RR 1.42; 95% CI 1.23–1.63; P < 0.00001; I2 = 8%) and RRT-associated infection events (RR 1.34; 95% CI 1.01–1.78; P = 0.04; I2 = 0%).ConclusionsThis meta-analysis suggested that early initiation of RRT was not associated with survival benefit in critically ill patients with AKI. In addition, early initiation of RRT could lead to unnecessary RRT exposure in some patients, resulting in a waste of health resources and a higher incidence of RRT-associated adverse events. Maybe, only critically ill patients with a clear and hard indication, such as severe acidosis, pulmonary edema, and hyperkalemia, could benefit from early initiation of RRT.

Effect of initiation of renal replacement therapy on mortality in acute pancreatitis patients.

This study aims to explore effect of initiation of renal replacement therapy (RRT) on mortality in acute pancreatitis (AP) patients. In this study, a total of 92 patients from the surgical intensive care unit (SICU) of the Second Affiliated Hospital of Harbin Medical University who were diagnosed with AP and underwent RRT or not between January 2014 and December 2018 were included in this retrospective study. Demographic and clinical data were obtained on admission to SICU. Patients were divided into early initiation of RRT group (n = 44) and delayed initiation of RRT group (n = 48). Duration of mechanical ventilation (MV), intra-peritoneal pressure, vasopressors infusion, body temperature, procalcitonin, creatinine, platelet counts, length of hospital stay and prognosis were recorded during hospitalization, and then compared between groups. Patients with delayed initiation of RRT exhibited significantly higher APACHE II score, SOFA score and lower GCS score than those with early initiation of RRT (P < 0.001, <0.001, = 0.04, respectively). No difference in the rest of the baseline data and vasopressors infusion was found. Dose of Norepinephrine, maximum and mean PCT, maximum and mean creatinine, maximum and mean intra-peritoneal pressure, length of hospital stay, prognosis of ICU and hospitalization showed significant difference between groups. Early initiation of RRT may be beneficial for AP patients, which can provide some insight and support for patients’ treatment in clinic.

Comparison of Standard Conservative Treatment and Early Initiation of Renal Replacement Therapy in Pregnancy-related Acute Kidney Injury: A Single-center Prospective Study.

Introduction and objectivePregnancy-related acute kidney injury (PRAKI) is one of the most important cause of maternal and fetal morbidity and mortality. Some of the reasons behind PRAKI may be due to sepsis, postpartum hemorrhage, preeclampsia, thrombotic microangiopathies (TMA), and acute fatty liver of pregnancy (AFLP). The timing of initiation of renal replacement therapy (RRT) for better patient outcome is still debatable. We conducted this study to establish whether earlier initiation of RRT in PRAKI improves fetomaternal survival compared to a more conservative approach.Materials and methodsThis is a prospective study, where patients were screened at a multispecialty tertiary care hospital in north India for 1 year. The patients were divided into two groups: early RRT and standard AKI treatment. The demographic profile and clinical characteristics of the patients in terms of age, parity access to antenatal care, fetal outcome, urine output, hematological and biochemical profiles, RRT, duration of hospitalization, recovery of renal function, and patients survival were recorded.ResultsThis prospective study conducted included 13 patients in the early RRT group and 23 patients in the standard group. Considering the fetal outcome, the number of fetal deaths in early RRT group were 14.29%, whereas for the standard group it was 85.71%. In all, 75% of early RRT group and 25% of standard group had normal term delivery. Probability test applied showed they were statistically significant. One maternal mortality was there in the standard group. The indices of maternal outcome in PRAKI patients were found to be statistically insignificant.ConclusionThe planning of RRT whether early or late does not make a difference in maternal mortality or morbidity. The fetal outcome is significantly better for patients with early RRT than conservative treatment in PRAKI.How to cite this articleBanerjee A, Mehrotra G. Comparison of Standard Conservative Treatment and Early Initiation of Renal Replacement Therapy in Pregnancy-related Acute Kidney Injury: A Single-center Prospective Study. Indian J Crit Care Med 2020;24(8):688–694.

Early versus standard renal replacement therapy after left ventricular assist device implantation.

Renal function may improve after left ventricular assist device (LVAD) implant, however, some patients develop postoperative acute kidney injury (AKI). Randomized trials showed benefit for early renal replacement therapy (RRT) in critically ill patients with AKI, but this practice has not been studied in LVAD patients. We performed a single-center, retrospective cohort study of all adults (>18 years) who underwent LVAD placement from 1/2010 to 12/2018. We collected preoperative, hemodynamic, echocardiographic, intraoperative, and postoperative data. AKI was defined according to Kidney Disease: Improving Global Outcomes definition. Early (E) RRT was considered treatment at AKI stage II or below. Standard (S) RRT was considered treatment at AKI stage III. Outcomes and Kaplan-Meier analysis were compared between groups. A total of 184 patients were included (mean age 56.10 years, 81% males, 30.4% African-American race). A total of 71 (38.6%) developed AKI and 17 (9.24%) needed RRT (11 E vs 6 S). A total of 11 remained hemodialysis-dependent at discharge (5 [45.5%] in E vs 6 [100%] in S, P = .043). There was a trend toward shorter intensive care unit stay and ventilation time in E group, and overall hospital stay was significantly less in the E group (48.18 ± 25.95 vs 94.00 ± 53.07 days, P = .028). Thirty-day mortality was similar between groups (E 18% vs S 16%, P = .9), but there was a trend toward improved overall survival in the E group. This is the first study to examine early initiation of RRT after LVAD implant. Early RRT was associated with shorter hospital stay, lower need for permanent RRT, and a trend toward improved survival. This practice may provide significant cost savings and should be examined further.

Delayed versus early initiation of renal replacement therapy for severe acute kidney injury: a systematic review and individual patient data meta-analysis of randomised clinical trials

The timing of renal replacement therapy (RRT) for severe acute kidney injury is highly debated when no life-threatening complications are present. We assessed whether a strategy of delayed versus early RRT initiation affects 28-day survival in critically ill adults with severe acute kidney injury. In this systematic review and individual patient data meta-analysis, we searched MEDLINE (via PubMed), Embase, and the Cochrane Central Register of Controlled Trials for randomised trials published from April 1, 2008, to Dec 20, 2019, that compared delayed and early RRT initiation strategies in patients with severe acute kidney injury. Trials were eligible for inclusion if they included critically ill patients aged 18 years or older with acute kidney injury (defined as a Kidney Disease: Improving Global Outcomes [KDIGO] acute kidney injury stage 2 or 3, or, where KDIGO was unavailable, a renal Sequential Organ Failure Assessment score of 3 or higher). We contacted the principal investigator of each eligible trial to request individual patient data. From the included trials, any patients without acute kidney injury or who were not randomly allocated were not included in the individual patient data meta-analysis. The primary outcome was all-cause mortality at day 28 after randomisation. This study is registered with PROSPERO (CRD42019125025). Among the 1031 studies identified, one study that met the eligibility criteria was excluded because the recruitment period was not recent enough, and ten (including 2143 patients) were included in the analysis. Individual patient data were available for nine studies (2083 patients), from which 1879 patients had severe acute kidney injury and were randomly allocated: 946 (50%) to the delayed RRT group and 933 (50%) to the early RRT group. 390 (42%) of 929 patients allocated to the delayed RRT group and who had available data did not receive RRT. The proportion of patients who died by day 28 did not significantly differ between the delayed RRT group (366 [44%] of 837) and the early RRT group (355 [43%] of 827; risk ratio 1·01 [95% CI 0·91 to 1·13], p=0·80), corresponding to an overall risk difference of 0·01 (95% CI -0·04 to 0·06). There was no heterogeneity across studies (I2=0%; τ2=0), and most studies had a low risk of bias. The timing of RRT initiation does not affect survival in critically ill patients with severe acute kidney injury in the absence of urgent indications for RRT. Delaying RRT initiation, with close patient monitoring, might lead to a reduced use of RRT, thereby saving health resources. None.

707 Factors Associated with Early vs. Late AKI in Burn Patients

Abstract Introduction Acute kidney injury (AKI) in burn patients is known to increase morbidity and mortality, with significant improvement after the initiation of renal replacement therapy (RRT). Our primary objective is to characterize the sub-population of burn patients with early (≤48 hours post-injury) versus late (&amp;gt;48 hours post injury) onset of AKI. We hypothesize that patients with early onset AKI versus late onset AKI have different causalities, risk factors, and outcomes. A secondary aim is to investigate the timing and use of RRT in the setting of early and late AKI with the goal of improving morbidity and mortality. Methods A retrospective cohort study was conducted on all patients admitted to a verified burn center requiring RRT for AKI from 2015 – 2019. Patients were stratified by age, gender, percent total body surface area (TBSA), race, time of onset of AKI, timing of RRT initiation, hospital LOS, pre-admission co-morbidities, admission toxicology, and mortality. Results In total, 1537 burn patients were reviewed and 1.3% (n=20) required RRT for AKI. Out of this cohort, 70% developed early AKI and 30% developed late AKI. Early versus late AKI patients had the same median age (57). Patients with larger TBSA developed early AKI (median TBSA 51%) versus late AKI (median TBSA 21%). Half of the patients who developed late AKI presented with positive alcohol toxicology screens, while 86% of patients with early AKI tested negative. The patient mortality rate in early AKI was 57%, and the mortality rate in late AKI was 17%. Only 14% of early AKI patients required dialysis at discharge, while 33% of late AKI patients required dialysis at discharge. The majority of patients started on early RRT (&amp;lt; 48 hours post injury) did not develop sepsis (43% developed sepsis), while the majority of patients started on late RRT (&amp;gt;48 hours post injury) did develop sepsis (85%). Conclusions Positivity for alcohol on admission may be a predictor for development of late AKI, while larger TBSA may predict early AKI. Mortality is higher for patients with early AKI; however, the need for dialysis at discharge is higher in patients with late AKI. Our data further suggests that early initiation of RRT is negatively correlated with the development of sepsis. Applicability of Research to Practice A deeper understanding of associations and causality of early vs late onset AKI in burn patients will help guide further management and improve outcomes.

Comparison between watchful waiting strategy and early initiation of renal replacement therapy in the critically ill acute kidney injury population: an updated systematic review and meta-analysis

BackgroundThe optimal timing of renal replacement therapy (RRT) initiation is debatable. Many articles in this field enrolled trials not based on acute kidney injury. The safety of the watchful waiting strategy has not been fully discussed, and late RRT initiation criteria vary across studies. The effect of early RRT initiation in the AKI population with high plasma neutrophil gelatinase-associated lipocalin (NGAL) has not been examined yet.MethodsIn accordance with PRISMA guidelines, the PubMed, Embase, and Cochrane databases were systemically searched for randomized controlled trials (RCTs). Trials not conducted in the AKI population were excluded. Data of study characteristics, primary outcome (all-cause mortality), and related secondary outcomes [mechanical ventilation (MV) days, length of hospital stay, RRT days, and length of ICU stay] were extracted. The outcomes were compared between early and late RRT groups by estimating the pooled odds ratio (OR) for binary outcomes and the weighted mean difference for continuous outcomes. Prospective trials were also examined and analyzed using the same method.ResultsNine RCTs with 1938 patients were included. Early RRT did not provide a survival benefit (pooled OR, 0.88; 95% confidence interval [CI] 0.62–1.27). However, the early RRT group had significantly fewer MV days (pooled mean difference, − 3.98 days; 95% CI − 7.81 to − 0.15 days). Subgroup analysis showed that RCTs enrolling the surgical population (P = .001) and the AKI population with high plasma NGAL (P = .031) had favorable outcomes regarding RRT days in the early initiation group. Moreover, 6 of 9 RCTs were selected for examining the safety of the watchful waiting strategy, and no significant differences were found in primary and secondary outcomes between the early and late RRT groups.ConclusionsOverall, early RRT initiation did not provide a survival benefit, but a possible benefit of fewer MV days was detected. Early RRT might also provide the benefit of shorter MV or RRT support in the surgical population and in AKI patients with high plasma NGAL. Depending on the conventional indication for RRT initiation, the watchful waiting strategy is safe on the basis of all primary and secondary outcomes.