Pediatric Post–Cardiac Arrest Care: A Scientific Statement From the American Heart Association

Prognostic Value of Brain Magnetic Resonance Imaging in Children After Out-of-Hospital Cardiac Arrest: Predictive Value of Normal Magnetic Resonance Imaging for a Favorable Two-Year Outcome

BACKGROUND

Determine the predictive value of brain magnetic resonance imaging (MRI) findings less than or equal to seven days post-pediatric out-of-hospital cardiac arrest (OHCA) for long-term outcomes.

METHODS

This retrospective single-center study included children (zero to 17 years) with OHCA admitted to a tertiary care hospital pediatrc intensive care unit from 2012 to 2020 who underwent brain MRI at most seven days postarrest. A neuroimaging scoring system was designed, using T1-, T2-, and diffusion-weighted images based on previously published scores and brain injury patterns. Extensive brain injury was defined as ≥50% cortex/white matter injury or four or more of nine predefined brain regions. Pediatric cerebral performance category (PCPC) scores were determined at hospital discharge and two years post-OHCA as part of routine follow-up care. Favorable neurological outcomes were defined as PCPC scores of 1 to 2 or no change from prearrest status.

RESULTS

Among 142 children, 56 had a brain MRI at less than or equal to seven days postarrest. Median arrest age was 3.3 years (first and third quartiles [Q1, Q3]: 0.6, 13.6), and 64% were male. Brain MRI was obtained four days post-OHCA (Q1, Q3: 3, 5). Normal brain MRI findings (i.e., negative test result) predicted favorable outcomes with 100% negative predictive value, whereas extensive injury (i.e., positive test result) predicted unfavorable outcomes and death with 100% positive predictive value.

CONCLUSIONS

A normal brain MRI at less than or equal to seven days postarrest predicts favorable neurological outcomes two years later, whereas extensive brain injury predicts unfavorable neurological outcomes or death at discharge and two years post-OHCA.

Blood Glucose Range for Hyperglycemic PICU Children With Primary Neurologic Diagnoses: Analysis of the Heart and Lung Failure-Pediatric Insulin Titration (HALF-PINT) Trial

OBJECTIVES

To compare two blood glucose (BG) ranges in critically ill children with and without primary neurologic diagnoses in the Heart and Lung Failure-Pediatric Insulin Titration trial (HALF-PINT; ClinicalTrials.gov Identifier NCT01565941).

DESIGN

Non-prespecified post hoc analysis.

SETTING

Thirty-one PICUs in the United States, and one in Canada.

PATIENTS

Non-diabetic children enrolled from April 2012 to September 2016 with cardiovascular or respiratory failure and hyperglycemia. Patients in the neurologic subgroup had primary neurologic diagnoses on ICU admission.

INTERVENTIONS

Patients were randomized to insulin infusion to target lower-BG (80-110 mg/dL; 4.4-6.1 mmol/L) or higher-BG (150-180 mg/dL; 8.3-10 mmol/L).

MEASUREMENTS AND MAIN RESULTS

Primary diagnosis (neurologic vs. non-neurologic), daily BG and insulin values, outcomes (number of PICU-free days through day 28 and 1-y post-PICU discharge adaptive behavior composite score of Vineland Adaptive Behavior Scales, Second Edition). Of 698 patients analyzed, 64 (30 lower-BG target, 34 higher-BG target) had primary neurologic diagnoses and 634 (319 lower-BG target, 315 higher-BG target) had non-neurologic diagnoses. Within the neurologic subgroup, patients in the lower-BG targeting group had fewer ICU-free days compared with those in the higher-BG targeting group (median 8.5 vs. 21.1 d), whereas there was no difference between BG groups in the non-neurologic subgroup (20.5 vs. 19.3 d; interaction p = 0.02). One-year adaptive behavior composite score was less favorable for the lower-BG targeting group in those with neurologic diagnoses (mean 63.3 vs. 87.6), but no different in those with non-neurologic diagnoses (81.9 vs. 78.4; interaction p = 0.02). Lower-BG targeting was associated with more hypoglycemia (< 60 mg/dL) in both diagnostic subgroups, with no differential effect across subgroups ( p = 0.47).

CONCLUSIONS

In this non-prespecified analysis of the HALF-PINT trial data, lower-BG targeting in hyperglycemic critically ill children with primary neurologic diagnoses was associated with unfavorable outcomes, while such BG targeting in those with non-neurologic diagnoses was not associated with adverse outcomes.

Indications for continuous electroencephalography and frequency of electrographic seizure detection in a pediatric and neonatal cardiovascular intensive care unit

OBJECTIVE

Seizures are a recognized complication of critical cardiovascular illness in infants and children. We assessed the diagnostic yield of continuous video-electroencephalography (cEEG) in a pediatric and neonatal cardiovascular intensive care unit (CVICU) by the symptoms and risk factors prompting cEEG evaluation.

METHODS

This retrospective case series included all consecutive cEEGs in patients ≤21 years old performed in one CVICU over 38 months. cEEG indications were categorized as (1) index symptoms of concern and/or (2) clinical risk factors. Index symptoms were divided into (1) vital sign symptoms (i.e., heart rate, blood pressure, oxygen, respiration, or temperature) and (2) non-vital sign symptoms (i.e., mental status, abnormal movements, eye findings, weakness, or failed extubation). Indications for cEEG were extracted by manual chart review. The presence of seizures was established electrographically from neurophysiologist reports.

RESULTS

There were 605 cEEGs from 411 patients. The median study was 26 h (25%-75%, interquartile range = 20-41 h). Seizures were detected in 57 of 605 (9%) cEEGs overall; in 34 of 356 (10%) cEEGs obtained for risk factors alone (odds ratio [OR] = 1.03, 95% confidence interval [CI] = .60-1.82, p = .90), 0 of 104 (0%) for isolated vital sign changes (p < .001), 10 of 101 (10%) for symptoms not involving vital signs (OR = 1.06, 95% CI = .52-2.09, p = .88), and in 13 of 44 (30%) for both vital sign and non-vital sign symptoms (OR = 4.93, 95% CI = 2.45-9.77, p < .001). On univariate analysis, symptoms involving gaze deviation, abnormal limb movements, or intermittent oxygen desaturation, and the risk factors of preexisting epilepsy, recent neurosurgery, acute stroke, and cardiac air embolism were associated with seizures (p < .05).

SIGNIFICANCE

There were zero electrographic seizures in cEEGs obtained for isolated vital sign changes, whereas cEEGs obtained for the combination of vital sign changes and other non-vital sign symptoms were five times more likely to detect electrographic seizures than cEEGs obtained based on risk factors alone.

Impaired Cerebral Autoregulation in Children

Managing acute brain injury involves protecting the brain from secondary injury by addressing the mismatch between metabolic demand and cerebral perfusion. Observational studies have associated impaired cerebral autoregulation, a physiological process governing the regulation of cerebral blood flow, with unfavorable neurological outcomes in both pediatric and adult populations. We review the pathophysiology of cerebral autoregulation and discuss methods for assessing and monitoring it in children after acquired brain injury. We also examine the current research investigating the relationship between impaired cerebral autoregulation and outcomes following traumatic brain injury, cardiac arrest, cardiopulmonary bypass, and extracorporeal membrane oxygenation. Furthermore, we outline potential areas for future research in cerebral autoregulation and its clinical implications for pediatric patients with brain injuries.

Electroencephalographic (EEG) Stages in Patients With Cerebral Edema Following Cardiac Arrest

ObjectiveTo describe electroencephalographic (EEG) changes in pediatric patients with cerebral edema after cardiac arrest.MethodsA retrospective study of patients admitted to the pediatric intensive care unit from July 2021 to January 2023. We included patients with cardiac arrest and changes in EEG background with clinical changes and/or neuroimaging consistent with cerebral edema. We excluded patients with electrographic seizures. We applied American Clinical Neurophysiology Society standardized critical care EEG terminology to classify EEG background, noting timing of the change in background classification. Clinical variables included age, sex, and neuroimaging findings and were described with descriptive statistics.ResultsNine patients met inclusion criteria, with median age 24 months (interquartile range 21-49), and 89% were male. There were 5 common EEG stages: stage 1, burst suppression/burst attenuation; stage 2, continuous/discontinuous ± multifocal sporadic epileptiform discharges ± rhythmic or periodic patterns; stage 3, discontinuous/burst suppression/burst attenuation ± rhythmic or periodic patterns; stage 4, gradual voltage suppression; and stage 5, diffuse suppression. The ranges for each stage were as follows: stage 1, 2-10 hours; stage 2, 2.5-15.5 hours; stage 3, 0.5-6.24 hours; and stage 4, 0.5-11 hours. We could not calculate the duration of stage 5 given no uniform time to EEG discontinuation. One patient had a clinical change in stage 3. Remaining patients presented with fixed and dilated pupils with global anoxic injury.ConclusionsEEG stages of cerebral edema have not been described after pediatric cardiac arrest. These stages may be relevant to other patient populations. Early stages may be a therapeutic target for intracranial pressure-lowering medications and/or neuroprotective strategies to minimize sequalae of cerebral edema.

Evaluating post-cardiac arrest blood pressure thresholds associated with neurologic outcome in children: Insights from the pediRES-Q database

BACKGROUND

Current Pediatric Advanced Life Support Guidelines recommend maintaining blood pressure (BP) above the 5th percentile for age following return of spontaneous circulation (ROSC) after cardiac arrest (CA). Emerging evidence suggests that targeting higher thresholds, such as the 10th or 25th percentiles, may improve neurologic outcomes. We aimed to evaluate the association between post-ROSC BP thresholds and neurologic outcome, hypothesizing that maintaining mean arterial pressure (MAP) and systolic blood pressure (SBP) above these thresholds would be associated with improved outcomes at hospital discharge.

METHODS

This retrospective, multi-center, observational study analyzed data from the Pediatric Resuscitation Quality Collaborative (pediRES-Q). Children (<18 years) who achieved ROSC following index in-hospital or out-of-hospital cardiac arrest and survived ≥ 6 h were included. Multivariable logistic regression was preformed to analyze the association between the pre-defined BP thresholds (5th, 10th, and 25th percentiles) and favorable neurologic outcome, controlling for illness category (surgical-cardiac), initial rhythm (shockable), arrest time (weekend or night), age, CPR duration, and clustering by site.

RESULTS

There were 787 patients with evaluable MAP data and 711 patients with evaluable SBP data. Fifty-four percent (N = 424) of subjects with MAP data and 53 % (N = 380) with SBP data survived to hospital discharge with favorable neurologic outcome. MAP above the 5th, 10th, and 25th percentile thresholds was associated with significantly greater odds of favorable outcome compared to patients with MAP below target (aOR, 1.81 [95 % CI, 1.32, 2.50]; 1.50 [95 % CI, 1.10, 2.05]; 1.40 [95 % CI, 1.01, 1.94], respectively). Subjects with lowest SBP above the 5th percentile also had greater odds of favorable outcome (aOR, 1.44 [95 % CI, 1.04, 2.01]). Associations between lowest SBP above the 10th percentile and 25th percentile did not reach statistical significance (aOR 1.33 [95 % CI, 0.96, 1.86]; 1.23 [95 % CI, 0.87, 1.75], respectively).

CONCLUSION

After pediatric CA, maintaining MAP above the 5th, 10th, and 25th percentiles and SBP above the 5th percentile during the first 6 h following ROSC was significantly associated with improved neurologic outcomes.

Practice patterns for acquiring neuroimaging after pediatric in-hospital cardiac arrest

AIMS

To determine which patient and cardiac arrest factors were associated with obtaining neuroimaging after in-hospital cardiac arrest, and among those patients who had neuroimaging, factors associated with which neuroimaging modality was obtained.

METHODS

Retrospective cohort study of patients who survived in-hospital cardiac arrest (IHCA) and were enrolled in the ICU-RESUS trial (NCT02837497).

RESULTS

We tabulated ultrasound (US), CT, and MRI frequency within 7 days following IHCA and identified patient and cardiac arrest factors associated with neuroimaging modalities utilized. Multivariable models determined which factors were associated with obtaining neuroimaging. Of 1000 patients, 44% had ≥ 1 neuroimaging study (US in 31%, CT in 18%, and MRI in 6% of patients). Initial USs were performed a median of 0.3 [0.1,0.5], CTs 1.4 [0.4,2.8], and MRIs 4.1 [2.2,5.1] days post-arrest. Neuroimaging timing and frequency varied by site. Factors associated with greater odds of neuroimaging were cardiac arrest in CICU (versus PICU), longer duration CPR, receiving ECMO post-arrest, and post-arrest care with targeted temperature management or EEG monitoring. US performance was associated with congenital heart disease. CT was associated with age ≥ 1-month, greater pre-arrest disability, and receiving CPR for ≥ 16 min. MRI utilization increased with pre-existing respiratory insufficiency and respiratory decompensation as arrest cause, and medical cardiac and surgical non-cardiac or trauma illness category. Overall, if neuroimaging was obtained, US was more common in CICU while CT/MRI were utilized more in PICU.

CONCLUSIONS

Practice patterns for acquiring neuroimaging after IHCA are variable and influenced by patient, cardiac arrest, and site factors.

Predictive value analysis of albumin-related inflammatory markers for short-term outcomes in patients with In-hospital cardiac arrest

OBJECTIVE

This study investigated the predictive value of albumin-related inflammatory markers for short-term outcomes in in-hospital cardiac arrest (IHCA) patients.

METHODS

A linear mixed model investigated the dynamic changes of markers within 72 hours after return of spontaneous circulation (ROSC). Time-Dependent COX regression explored the predictive value. Mediation analysis quantified the association of markers with organ dysfunctions and adverse outcomes.

RESULTS

Prognostic Nutritional Index (PNI) and RDW-Albumin Ratio (RAR) slightly changed (p > 0.05). Procalcitonin-Albumin Ratio (PAR1) initially increased and then slowly decreased. Neutrophil-Albumin Ratio (NAR) and Platelet-Albumin Ratio (PAR2) decreased slightly during 24-48 hours (all p<0.05). PNI (HR = 1.646, 95%CI (1.033,2.623)), PAR1 (HR = 1.69, 95%CI (1.057,2.701)), RAR (HR = 1.752,95%CI (1.103,2.783)) and NAR (HR = 1.724,95%CI (1.078,2.759)) were independently associated with in-hospital mortality. PNI (PM = 45.64%, 95%CI (17.05%,87.02%)), RAR (PM = 45.07%,95%CI (14.59%,93.70%)) and NAR (PM = 46.23%,95%CI (14.59%,93.70%)) indirectly influenced in-hospital mortality by increasing SOFA (central) scores. PNI (PM = 21.75%, 95%CI(0.67%,67.75%)) may also indirectly influenced outcome by increasing SOFA (renal) scores (all p < 0.05).

CONCLUSIONS

Within 72 hours after ROSC, albumin-related inflammatory markers (PNI, PAR1, RAR, and NAR) were identified as potential predictors of short-term prognosis in IHCA patients. They may mediate the adverse outcomes of patients by causing damages to the central nervous system and renal function.

Prediction of good neurological outcome after return of circulation following paediatric cardiac arrest: A systematic review and meta-analysis

AIM

To evaluate the ability of blood-biomarkers, clinical examination, electrophysiology, or neuroimaging, assessed within 14 days from return of circulation to predict good neurological outcome in children following out- or in-hospital cardiac arrest.

METHODS

Medline, EMBASE and Cochrane Trials databases were searched (2010-2023). Sensitivity and false positive rates (FPR) for good neurological outcome (defined as either 'no, mild, moderate disability or minimal change from baseline') in paediatric survivors were calculated for each predictor. Risk of bias was assessed using the QUIPS tool.

RESULTS

Thirty-five studies (2974 children) were included. The presence of any of the following had a FPR < 30% for predicting good neurological outcome with moderate (50-75%) or high (>75%) sensitivity: bilateral reactive pupillary light response within 12 h; motor component ≥ 4 on the Glasgow Coma Scale score at 6 h; bilateral somatosensory evoked potentials at 24-72 h; sleep spindles, and continuous cortical activity on electroencephalography within 24 h; or a normal brain MRI at 4-6d. Early (≤12 h) normal lactate levels (<2mmol/L) or normal s100b, NSE or MBP levels predicted good neurological outcome with FPR rate < 30% and low (<50%) sensitivity. All studies had moderate to high risk of bias with timing of measurement, definition of test, use of multi-modal tests, or outcome assessment heterogeneity.

CONCLUSIONS

Clinical examination, electrophysiology, neuroimaging or blood-biomarkers as individual tests can predict good neurological outcome after cardiac arrest in children. However, evidence is often low quality and studies are heterogeneous. Use of a standardised, multimodal, prognostic algorithm should be studied and is likely of added value over single modality testing.

Targeted Temperature Management After Pediatric Cardiac Arrest: A Quality Improvement Program With Multidisciplinary Implementation in the PICU

OBJECTIVES

We aimed to implement a post-cardiac arrest targeted temperature management (TTM) bundle to reduce the percent of time with a fever from 7% to 3.5%.

DESIGN

A prospective, quality improvement (QI) initiative utilizing the Method for Improvement. The pre-intervention historical control period was February 2019 to March 2021, and the intervention test period was April 2021 to June 2022.

SETTING

The PICU of a freestanding, tertiary children's hospital, in the United States.

PATIENTS

Pediatric patients 2 days old or older to 18 young or younger than years old who experienced cardiac arrest, received greater than or equal to 2 minutes of chest compressions, required invasive mechanical ventilation post-resuscitation, and had no documented limitations of care.

INTERVENTIONS

We developed and implemented a TTM bundle that included standard temperature goals, instructions and training on cooling blanket use, scheduled prescription of antipyretics, an algorithm for managing shivering, and standardized orders in our electronic health record.

MEASUREMENTS AND RESULTS

We reviewed data from 29 patients in the pre-intervention period and studied 46 in the intervention period. In comparison with historical controls, the reduction in median (interquartile range [IQR]) percentage of febrile (> 38°C) time per patient associated with the TTM bundle was 0% (IQR, 0-3%) vs. 7% (IQR, 0-13%; p < 0.001). The intervention period, vs. pre-intervention, was associated with fewer patients with fever at any time (16/46 vs. 21/29; mean reduction, 37%; 95% CI, 13.8-54.8%; p = 0.002). We failed to identify an association between the intervention period, vs. pre-intervention, and the development of hypothermia (< 35°C; 8/46 vs. 3/29; mean change, 7%; 95% CI, -10.9% to 21.8%; p = 0.40).

CONCLUSIONS

In this QI project, we have demonstrated that implementation of a TTM bundle is associated with reduced duration and frequency of fever in patients who survive cardiac arrest.

Plasma brain-related biomarkers and potential therapeutic targets in pediatric ECMO

Extracorporeal membrane oxygenation (ECMO) is a technique used to support severe cardiopulmonary failure. Its potential life-saving benefits are tempered by the significant risk for acute brain injury (ABI), from both primary pathophysiologic factors and ECMO-related complications through central nervous system cellular injury, blood-brain barrier dysfunction (BBB), systemic inflammation and neuroinflammation, and coagulopathy. Plasma biomarkers are an emerging tool used to stratify risk for and diagnose ABI, and prognosticate neurofunctional outcomes. Components of the neurovascular unit have been rational targets for this inquiry in ECMO. Central nervous system (CNS) neuronal and astroglial cellular-derived neuron-specific enolase (NSE), tau, glial fibrillary acidic protein (GFAP) and S100β elevations have been detected in ABI and are associated with poorer outcomes. Evidence of BBB breakdown through peripheral blood detection of CNS cellular components NSE, GFAP, and S100β, as well as evidence of elevated BBB components vWF and PDGFRβ are associated with higher mortality and worse neurofunctional outcomes. Higher concentrations of pro-inflammatory cytokines (IL-1β, IL-6, IFN-γ, TNF-α) are associated with abnormal neuroimaging, and proteomic expression panels reveal different coagulation and inflammatory responses. Abnormal coagulation profiles are common in ECMO with ongoing studies attempting to describe specific abnormalities either being causal or associated with neurologic outcomes; vWF has shown some promise. Understanding these mechanisms of injury through biomarker analysis supports potential neuroprotective strategies such as individualized blood pressure targets, judicious hypercarbia and hypoxemia correction, and immunomodulation (inhaled hydrogen and N-acetylcysteine). Further research continues to elucidate the role of biomarkers as predictors, prognosticators, and therapeutic targets.

A novel translational bioinformatics framework for facilitating multimodal data analyses in preclinical models of neurological injury

Pediatric neurological injury and disease is a critical public health issue due to increasing rates of survival from primary injuries (e.g., cardiac arrest, traumatic brain injury) and a lack of monitoring technologies and therapeutics for treatment of secondary neurological injury. Translational, preclinical research facilitates the development of solutions to address this growing issue but is hindered by a lack of available data frameworks and standards for the management, processing, and analysis of multimodal datasets. Here, we present a generalizable data framework that was implemented for large animal research at the Children's Hospital of Philadelphia to address this technological gap. The presented framework culminates in a custom, interactive dashboard for exploratory analysis and filtered dataset download. Compared with existing clinical and preclinical data management solutions, the presented framework better enables management of various data types (single measure, repeated measures, time series, and imaging), integration of datasets for comparison across experimental models, cohorts, and groups, and facilitation of predictive modeling from integrated datasets. Further, a predictive model development use case demonstrated utilization and value of the data framework. The general outline of a preclinical data framework presented here can serve as a template for other translational research labs that generate heterogeneous datasets and require a dynamic platform that can easily evolve alongside their research.

PCSK9 inhibitor attenuates cardiac fibrosis in reperfusion injury rat by suppressing inflammatory response and TGF-β1/Smad3 pathway

Progressive cardiac fibrosis, a hallmark of heart failure, remains poorly understood regarding Proprotein convertase subtilisin/kexin type 9 (PCSK9) 's role. This study aims to elucidate PCSK9's involvement in cardiac fibrosis. After ischemia/reperfusion (I/R) injury surgery in rats, PCSK9 inhibitors were used to examine their effects on the transforming growth factor-β1 (TGF-β1)/small mother against decapentaplegic 3 (Smad3) pathway and inflammation. Elevated PCSK9, TGF-β1, and Smad3 levels were observed in cardiac tissues post-I/R injury, indicating fibrosis. PCSK9 inhibition reduced pro-fibrotic protein expression, protecting the heart and mitigating I/R-induced damage and fibrosis. Additionally, it ameliorated cardiac inflammation and reduced post-myocardial infarction (MI) size, improving cardiac function and slowing heart failure progression. PCSK9 inhibitors significantly attenuate myocardial fibrosis induced by I/R via the TGF-β1/Smad3 pathway.

Association of cumulative oxygen and carbon dioxide levels with neurologic outcome after pediatric cardiac arrest resuscitation: A multicenter cohort study

Objective

We aimed to (1) determine the association between cumulative PaO2 and PaCO2 exposure 24 h post-return of circulation and survival with favorable neurologic outcome. And (2) to assess adherence to American Heart Association post-cardiac arrest care treatment goals (PaO2 75-100 mmHg and PaCO2 35-45 mmHg).

Design and setting

Prospectively collected data were analysed from five Pediatric Resuscitation Quality collaborative sites supplemented with retrospective PaO2 and PaCO2 data.

Patients

Children aged 1 day-17 years with return of circulation after cardiac arrest, admitted 2019-2022, with ≥ 4 arterial blood gasses spanning at least 12 h within 24 h post-return of ciculation, were eligible. Congenital cyanotic heart disease events were excluded.

Measurements

Area under the curve calculation provided hourly cumulative PaO2 and PaCO2 exposures per child and similarly guideline recommended cumulative ranges. The primary outcome was survival to hospital discharge with favorable neurologic outcome defined as a Pediatric Cerebral Performance Category 1-3, or no pre-arrest baseline difference.

Main results

Among 292 included children (median age 2.6 years (IQR 0.4-10.9)), 57 % survived to discharge and 48 % had favorable neurologic outcome (88 % of survivors). Cumulative PaO2 and PaCO2 exposure 0-24 h post-return of circulation were not significantly associated with favorable neurologic outcome in multivariable analysis (OR 1.0, 95 %CI 0.98-1.02 and OR 0.97, 95 %CI 0.87-1.09 respectively). Cumulative PaO2 and PaCO2 remained within guideline recommended ranges for 24 % and 58 % of children respectively with median areas under the curve over 0 - 24 h of 2664 mmHg (2151 - 3249 mmHg) for PaO2 and 948 mmHg (853 - 1051 mmHg) for PaCO2. AHA post-cardiac arrest care guideline recommendations for PaO2 (1800-2400 mmHg) and PaCO2 (840-1080 mmHg) were recalculated as area under the curve ranges. Achieving both normoxia and normocapnia was observed in 12 % of children.

Conclusions

Cumulative PaO2 and PaCO2 exposure in the first 24 h post-return of circulation was not associated with survival with favorable neurologic outcome. Pediatric AHA post-cardiac arrest care guideline normoxia and normocapnia goals were often not met. Larger cohort studies are necessary to improve the accuracy of cumulative exposure calculations, assess the long-term effects of PaO2 and PaCO2 exposure, and explore the influence of other post-cardiac arrest care therapeutic strategies.

Post-resuscitation care in the NICU

Post-cardiac arrest syndrome is a unique pathophysiologic condition that is well-described in adult and pediatric populations. Early, goal-directed care after cardiac arrest can mitigate ongoing injury, improve clinical outcomes, and prevent re-arrest. There is a paucity of evidence about post-cardiac arrest care in the NICU, however, pediatric principles and guidelines can be applied in the NICU in the appropriate clinical context.

Principles of resuscitation for infants with severe bronchopulmonary dysplasia

Severe bronchopulmonary dysplasia (sBPD) requiring invasive mechanical ventilation is a heterogeneous disease process that contributes to morbidity and mortality in infants. As the most common lung disease of prematurity, sBPD has a multitude of overlapping cardiac, airway, pulmonary vascular, and infectious phenotypic presentations that progress through four different phases of care. Premature infants with sBPD are at a high risk of acute decompensation and subsequent cardiopulmonary arrest. A comprehensive determination of the complex phenotypes that contribute to the clinical presentation will help clinicians decipher the phase of care, identify cardiopulmonary compromise earlier and guide targeted therapeutic intervention during acute episodes of deterioration. The approach to resuscitation of premature infants with sBPD undergoing an acute decompensation differs from general neonatal and pediatric resuscitation practices. This review summarizes the phenotypes of sBPD, the phases of care, the common triggers of acute exacerbations, and the principles of resuscitation of a deteriorating infant with sBPD. We offer a framework for sBPD resuscitation with a focus on prevention, assessment, and post-resuscitative care.

The association between early hypotension and neurologic outcome after pediatric cardiac ECPR in children with cardiac disease

Objective

Explore the relationship between early hypotension after ECPR and survival to hospital discharge (SHD) with favorable neurologic outcome (FNO) in children with cardiac disease.

Methods

Retrospective cohort study of patients undergoing ECPR at a single center pediatric cardiac intensive care unit. Hypotension was defined as MAP < 5th percentile for age. Primary and secondary exposure variables were presence and burden of hypotension respectively, during the first 6 h after ECPR. Our primary outcome was SHD with FNO defined by Pediatric Cerebral Performance Category score of 1-3 or no change from baseline. Secondary outcomes included acute central nervous system (CNS) injury via neuroimaging and EEG. Univariate and multivariable logistic regression analyses were performed.

Results

We analyzed 82 index ECPR events from 2010 to 2022. Hypotension was observed for at least one MAP value in 36/82 (43.9%) of the cohort. The median [IQR] burden of hypotension was 0 [0,14.3]%. Patients with SHD with FNO had shorter CPR duration, lower number of epinephrine and calcium doses, and lower maximum lactate levels when compared to patients who died or had SHD without FNO. After controlling for potential confounders, there was no association between presence of hypotension or burden of hypotension and SHD, SHD with FNO, or acute CNS injury via neuroimaging and EEG.

Conclusion

In children with cardiac disease, there was no association between early hypotension after ECPR and SHD with FNO. Multicenter studies are needed to better understand how early hypotension after ECPR affects neurologic outcomes in children with cardiac disease.

Outcomes of pediatric in-hospital cardiac arrest in the emergency department of a tertiary referral hospital in Tanzania: a retrospective cohort study

BACKGROUND

Cardiopulmonary resuscitation (CPR) is an emergency procedure performed to restore heart function to minimize anoxic injury to the brain following cardiac arrest. Despite the establishment of emergency department and training on Pediatric Advanced Life Support (PALS) at Muhimbili National Hospital (MNH) the outcomes of pediatric in-hospital cardiac arrest have not been documented. We ought to determine the outcomes and factors associated with 24-h survival after pediatric in-hospital cardiac arrests at MNH in Tanzania.

METHODS

We conducted a retrospective study of all patients aged 1 month to 18 years who had in-hospital cardiac arrests (IHCA) prompting CPR in the Emergency Medicine Department (EMD) at MNH, Tanzania from January 2016 to December 2019. Data was collected from electronic medical record (Wellsoft) system using a standardized and pretested data collection form that recorded clinical baseline, pre-arrest, arrest, and post-arrest parameters. Bivariate and multivariable logistic regression analyses were performed to assess the influence of each factor on 24-h survival.

RESULTS

A total of 11,951 critically ill patients were screened, and 257 (2.1%) had cardiac arrest at EMD. Among 136 patients enrolled, the median age was 1.5 years (interquartile range: 0.5-3 years) years, and the majority 108 (79.4%) aged ≤ 5 years, and 101 (74.3%) had been referred from peripheral hospitals. Overall stained return of spontaneous circulation was achieved in 70 (51.5%) patients, 24-h survival was attained in 43 (31.3%) of patients, and only 7 patients (5.2%) survived to hospital discharge. Factors independently associated with 24-h survival were CPR event during the day/evening (p = 0.033), duration of CPR ≤ 20 min (p = 0.000), reversible causes of cardiac arrest being identified (p = 0.001), and having assisted/mechanical ventilation after CPR (p = 0.002).

CONCLUSION

In our cohort of children with cardiac arrest, survival to hospital discharge was only 5%. Factors associated with 24-h survival were CPR events during the daytime, short duration of CPR, recognition of reversible causes of cardiac arrest, and receiving mechanical ventilation. Future studies should explore the detection of decompensation, the quality of CPR, and post-cardiac arrest care on the outcomes of IHCA.

Serum lactate/creatinine ratio and acute kidney injury in cardiac arrest patients

OBJECTIVES

Serum lactate and creatinine levels upon admission in cardiac arrest (CA) patients significantly correlate with acute kidney injury (AKI) post-restoration of autonomic circulation. However, the association between serum lactate/creatinine ratio (LCR) and AKI in this population remains unclear. This study aimed to explore the relationship between LCR at admission and cardiac arrest-associated acute kidney injury (CA-AKI).

DESIGN AND METHODS

We conducted a secondary analysis of previously published data on CA patient resuscitation, categorizing them into tertiles based on LCR levels. Univariate and multivariate logistic regression models and subgroup analyses were employed to investigate the association between LCR and CA-AKI. Non-linear correlations were explored using restricted cubic splines, and a two-piece wise logistic proportional hazards model for both sides of the inflection point was constructed.

RESULTS

A total of 374 patients (72.19 % male) were included, with intensive care unit mortality, in-hospital mortality, and neurologic dysfunction rates of 51.87 %, 56.95 %, and 39.57 %, respectively. The overall CA-AKI incidence was 59.09 %. Multivariate logistic proportional hazards analysis revealed a negative association between LCR and CA-AKI incidence (adjusted odds ratio [OR] 0.85, 95 % confidence intervals [CI] = 0.78-0.93, P=0.001). Triple spline restriction analysis depicted an L-shaped correlation between baseline LCR and CA-AKI incidence. Particularly, a baseline LCR<0.051 was negatively associated with CA-AKI incidence (OR 0.494, 95 % CI=0.319-0.764, P=0.002). Beyond the LCR turning point, estimated dose-response curves remained consistent with a horizontal line.

CONCLUSIONS

Baseline LCR in CA patients exhibits an L-shaped correlation with AKI incidence following restoration of autonomic circulation. The threshold for CA-AKI is 0.051. This finding suggests that LCR may aid in identifying CA patients at high risk of AKI.

Association of Postarrest Hypotension Burden With Unfavorable Neurologic Outcome After Pediatric Cardiac Arrest

OBJECTIVE

Quantify hypotension burden using high-resolution continuous arterial blood pressure (ABP) data and determine its association with outcome after pediatric cardiac arrest.

DESIGN

Retrospective observational study.

SETTING

Academic PICU.

PATIENTS

Children 18 years old or younger admitted with in-of-hospital or out-of-hospital cardiac arrest who had invasive ABP monitoring during postcardiac arrest care.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

High-resolution continuous ABP was analyzed up to 24 hours after the return of circulation (ROC). Hypotension burden was the time-normalized integral area between mean arterial pressure (MAP) and fifth percentile MAP for age. The primary outcome was unfavorable neurologic status (pediatric cerebral performance category ≥ 3 with change from baseline) at hospital discharge. Mann-Whitney U tests compared hypotension burden, duration, and magnitude between favorable and unfavorable patients. Multivariable logistic regression determined the association of unfavorable outcomes with hypotension burden, duration, and magnitude at various percentile thresholds from the 5th through 50th percentile for age. Of 140 patients (median age 53 [interquartile range 11-146] mo, 61% male); 63% had unfavorable outcomes. Monitoring duration was 21 (7-24) hours. Using a MAP threshold at the fifth percentile for age, the median hypotension burden was 0.01 (0-0.11) mm Hg-hours per hour, greater for patients with unfavorable compared with favorable outcomes (0 [0-0.02] vs. 0.02 [0-0.27] mm Hg-hr per hour, p < 0.001). Hypotension duration and magnitude were greater for unfavorable compared with favorable patients (0.03 [0-0.77] vs. 0.71 [0-5.01]%, p = 0.003; and 0.16 [0-1.99] vs. 2 [0-4.02] mm Hg, p = 0.001). On logistic regression, a 1-point increase in hypotension burden below the fifth percentile for age (equivalent to 1 mm Hg-hr of burden per hour of recording) was associated with increased odds of unfavorable outcome (adjusted odds ratio [aOR] 14.8; 95% CI, 1.1-200; p = 0.040). At MAP thresholds of 10th-50th percentiles for age, MAP burden below the threshold was greater in unfavorable compared with favorable patients in a dose-dependent manner.

CONCLUSIONS

High-resolution continuous ABP data can be used to quantify hypotension burden after pediatric cardiac arrest. The burden, duration, and magnitude of hypotension are associated with unfavorable neurologic outcomes.

Extracerebral multiple organ dysfunction and interactions with brain injury after cardiac arrest

Cardiac arrest and successful resuscitation cause whole-body ischemia and reperfusion, leading to brain injury and extracerebral multiple organ dysfunction. Brain injury is the leading cause of death and long-term disability in resuscitated survivors, and was conceptualized and treated as an isolated injury, which has neglected the brain-visceral organ crosstalk. Extracerebral organ dysfunction is common and is significantly associated with mortality and poor neurological prognosis after resuscitation. However, detailed description of the characteristics of post-resuscitation multiple organ dysfunction is lacking, and the bidirectional interactions between brain and visceral organs need to be elucidated to explore new treatment for neuroprotection. This review aims to describe current concepts of post-cardiac arrest brain injury and specific characteristics of post-resuscitation dysfunction in cardiovascular, respiratory, renal, hepatic, adrenal, gastrointestinal, and neurohumoral systems. Additionally, we discuss the crosstalk between brain and extracerebral organs, especially focusing on how visceral organ dysfunction and other factors affect brain injury progression. We think that clarifying these interactions is of profound significance on how we treat patients for neural/systemic protection to improve outcome.

The impact of pediatric post-cardiac arrest care on survival: A multicenter review from the AHA get with the Guidelines®-resuscitation post-cardiac arrest care registry

AIM

Adherence to post-cardiac arrest care (PCAC) recommendations is associated with improved outcomes for adults. We aimed to describe the survival impact of meeting American Heart Association (AHA) PCAC guidelines in children after cardiac arrest.

METHODS

We conducted a retrospective study using Get With The Guidelines® Resuscitation's (GWTG®-R) registry to describe the PCAC of patients ≤ 18 years old who suffered an in-hospital or out-of-hospital cardiac arrest (IHCA or OHCA). We evaluated the association between the absence of hypotension and fever in the initial 24 h following return of circulation (ROC) with survival to hospital discharge. We reviewed the utilization of monitoring/evaluation tools recommended in pediatric PCAC guidelines: electrocardiogram (ECG), electroencephalogram (EEG), and neuro-imaging.

RESULTS

We found 385 pediatric patients who suffered an IHCA or OHCA from 2015 through 2019 and survived at least 6 h post-ROC. Sixty-six percent of patients survived to hospital discharge. Following ROC, 56% of patients had EEG monitoring, 80% had an ECG performed, 47% had a head CT, and 26% had a cerebral MRI. In the initial 24 h post-ROC, 92% of patients did not have hypotension and 79% were afebrile. Patients without hypotension in the initial 24 h post-ROC had higher odds of survival to hospital discharge than those with hypotension (aOR 4.96; 95% CI 2.07, 11.90; p = 0.0003), adjusting for age and cardiac arrest location. Patients without hypotension and without fever in the initial 24 h post-ROC had higher odds of survival to hospital discharge compared to patients who had either hypotension or fever or both (aOR 1.98; 95% CI 1.06,3.71; p = 0.034).

CONCLUSION

In this retrospective multicenter registry study, absence of both post-cardiac arrest hypotension and fever were associated with increased odds of survival to hospital discharge. Further research is needed to understand the full impact of PCAC recommendation compliance on survival outcomes.

Elevated serum neurologic biomarker profiles after cardiac arrest in a porcine model

Introduction

Swine exhibit cerebral cortex mitochondrial dysfunction and neuropathologic injury after hypoxic cardiac arrest treated with hemodynamic-directed CPR (HD-CPR) despite normal Cerebral Performance Category scores. We analyzed the temporal evolution of plasma protein biomarkers of brain injury and inflammatory cytokines, as well as cerebral cortical mitochondrial injury and neuropathology for five days following pediatric asphyxia-associated cardiac arrest treated with HD-CPR.

Methods

One-month-old swine underwent asphyxia associated cardiac arrest, 10-20 min of HD-CPR (goal SBP 90 mmHg, coronary perfusion pressure 20 mmHg), and randomization to post-ROSC survival duration (24, 48, 72, 96, 120 h; n = 3 per group) with standardized post-resuscitation care. Plasma neurofilament light chain (NfL), glial fibrillary acidic protein (GFAP), and cytokine levels were collected pre-injury and 1, 6, 24, 48, 72, 96, and 120 h post-ROSC. Cerebral cortical tissue was assessed for: mitochondrial respirometry, mass, and dynamic proteins; oxidative injury; and neuropathology.

Results

Relative to pre-arrest baseline (9.4 pg/ml [6.7-12.6]), plasma NfL was increased at all post-ROSC time points. Each sequential NfL measurement through 48 h was greater than the previous value {1 h (12.7 pg/ml [8.4-14.6], p = 0.01), 6 h (30.9 pg/ml [17.7-44.0], p = 0.0004), 24 h (59.4 pg/ml [50.8-96.1], p = 0.0003) and 48 h (85.7 pg/ml [61.9-118.7], p = 0.046)}. Plasma GFAP, inflammatory cytokines or cerebral cortical tissue measurements were not demonstrably different between time points.

Conclusions

In a swine model of pediatric cardiac arrest, plasma NfL had an upward trajectory until 48 h post-ROSC after which it remained elevated through five days, suggesting it may be a sensitive marker of neurologic injury following pediatric cardiac arrest.

Cardiac Arrest and Cardiopulmonary Resuscitation Outcome Reports: 2024 Update of the Utstein Out-of-Hospital Cardiac Arrest Registry Template

The Utstein Out-of-Hospital Cardiac Arrest Resuscitation Registry Template, introduced in 1991 and updated in 2004 and 2015, standardizes data collection to enable research, evaluation, and comparisons of systems of care. The impetus for the current update stemmed from significant advances in the field and insights from registry development and regional comparisons. This 2024 update involved representatives of the International Liaison Committee on Resuscitation and used a modified Delphi process. Every 2015 Utstein data element was reviewed for relevance, priority (core or supplemental), and improvement. New variables were proposed and refined. All changes were voted on for inclusion. The 2015 domains-system, dispatch, patient, process, and outcomes-were retained. Further clarity is provided for the definitions of out-of-hospital cardiac arrest attended resuscitation and attempted resuscitation. Changes reflect advancements in dispatch, early response systems, and resuscitation care, as well as the importance of prehospital outcomes. Time intervals such as emergency medical service response time now emphasize precise reporting of the times used. New flowcharts aid the reporting of system effectiveness for patients with an attempted resuscitation and system efficacy for the Utstein comparator group. Recognizing the varying capacities of emergency systems globally, the writing group provided a minimal dataset for settings with developing emergency medical systems. Supplementary variables are considered useful for research purposes. These revisions aim to elevate data collection and reporting transparency by registries and researchers and to advance international comparisons and collaborations. The overarching objective remains the improvement of outcomes for patients with out-of-hospital cardiac arrest.

Background EEG Suppression Ratio for Early Detection of Cerebral Injury in Pediatric Cardiac Arrest

BACKGROUND

Our objective was to assess the utility of the 1-h suppression ratio (SR) as a biomarker of cerebral injury and neurologic prognosis after cardiac arrest (CA) in the pediatric hospital setting.

METHODS

Prospectively, we reviewed data from children presenting after CA and monitored by continuous electroencephalography (cEEG). Patients aged 1 month to 21 years were included. The SR, a quantitative measure of low-voltage cEEG (≤ 3 µV) content, was dichotomized as present or absent if there was > 0% suppression for one continuous hour. A multivariate logistic regression analysis was performed including age, sex, type of CA (i.e., in-hospital or out-of-hospital), and the presence of SR as a predictor of global anoxic cerebral injury as confirmed by magnetic resonance imaging (MRI).

RESULTS

We included 84 patients with a median age of 4 years (interquartile range 0.9-13), 64% were male, and 49% (41/84) had in-hospital CA. Cerebral injury was seen in 50% of patients, of whom 65% had global injury. One-hour SR presence, independent of amount, predicted cerebral injury with 81% sensitivity (95% confidence interval (CI) (66-91%) and 98% specificity (95% CI 88-100%). Multivariate logistic regression analyses indicated that SR was a significant predictor of both cerebral injury (β = 6.28, p < 0.001) and mortality (β = 3.56, p < 0.001).

CONCLUSIONS

The SR a sensitive and specific marker of anoxic brain injury and post-CA mortality in the pediatric population. Once detected in the post-CA setting, the 1-h SR may be a useful threshold finding for deployment of early neuroprotective strategies prior or for prompting diagnostic neuroimaging.

A narrative review of neuromonitoring modalities in critically ill children

Acute neurologic injury is common in critically ill children. Some conditions - such as traumatic brain injury, meningitis, and hypoxic-ischemic injury following cardiac arrest - require careful consideration of cerebral physiology. Specialized neuromonitoring techniques provide insight regarding patient-specific and disease-specific insight that can improve diagnostic accuracy, aid in targeting therapeutic interventions, and provide prognostic information. In this review, we will discuss recent innovations in invasive (e.g., intracranial pressure monitoring and related computed indices) and noninvasive (e.g., transcranial doppler, near-infrared spectroscopy) neuromonitoring techniques used in traumatic brain injury, central nervous system infections, and after cardiac arrest. We will discuss the pertinent physiological mechanisms interrogated by each technique and discuss available evidence for potential clinical application. We will also discuss the use of innovative neuromonitoring techniques to detect and manage neurologic complications in critically ill children with systemic illness, focusing on sepsis and cardiorespiratory failure requiring extracorporeal membrane oxygenation.

Cardiac arrest and cardiopulmonary resuscitation outcome reports: 2024 update of the Utstein Out-of-Hospital Cardiac Arrest Registry template

The Utstein Out-of-Hospital Cardiac Arrest Resuscitation Registry Template, introduced in 1991 and updated in 2004 and 2015, standardizes data collection to enable research, evaluation, and comparisons of systems of care. The impetus for the current update stemmed from significant advances in the field and insights from registry development and regional comparisons. This 2024 update involved representatives of the International Liaison Committee on Resuscitation and used a modified Delphi process. Every 2015 Utstein data element was reviewed for relevance, priority (core or supplemental), and improvement. New variables were proposed and refined. All changes were voted on for inclusion. The 2015 domains-system, dispatch, patient, process, and outcomes-were retained. Further clarity is provided for the definitions of out-of-hospital cardiac arrest attended resuscitation and attempted resuscitation. Changes reflect advancements in dispatch, early response systems, and resuscitation care, as well as the importance of prehospital outcomes. Time intervals such as emergency medical service response time now emphasize precise reporting of the times used. New flowcharts aid the reporting of system effectiveness for patients with an attempted resuscitation and system efficacy for the Utstein comparator group. Recognizing the varying capacities of emergency systems globally, the writing group provided a minimal dataset for settings with developing emergency medical systems. Supplementary variables are considered useful for research purposes. These revisions aim to elevate data collection and reporting transparency by registries and researchers and to advance international comparisons and collaborations. The overarching objective remains the improvement of outcomes for patients with out-of-hospital cardiac arrest.

Factors associated with family decision-making after pediatric out-of-hospital cardiac arrest

AIM

This study aims to identify demographic factors, area-based social determinants of health (SDOH), and clinical features associated with medical decision-making after pediatric out-of-hospital cardiac arrest (OHCA).

METHODS

This is a retrospective, exploratory, descriptive analysis of patients < 18 years old admitted to the pediatric intensive care unit (ICU) after OHCA from 2011 to 2022 (n = 217) at an urban tertiary care, free-standing children's hospital. Outcomes of interest included: (1) whether a new advance care plan (ACP) (defined as a written advance directive including do not resuscitate and/or do not intubate) was ordered during hospitalization, and (2) whether the patient was discharged with new medical technology (defined as tracheostomy and/or feeding tube). Logistic regression models identified features associated with these outcomes.

RESULTS

Of the 217 patients, 78 patients (36%) had a new ACP placed during their admission. Of the survivors, 26% (27/102) were discharged home with new medical technology. Factors associated with ACP were greater change in Pediatric Cerebral Performance Category (PCPC) score (aOR = 1.49, 95% CI [1.28-1.73], p-value < 0.001) and palliative care consultation (aOR = 2.39, 95% CI [1.16-4.89], p-value 0.018). Factors associated with new medical technology were lower change in PCPC score (aOR = 0.76, 95% C.I. [0.61-0.95], p-value = 0.015) and palliative care consultation (aOR = 7.07, 95% CI [3.01-16.60], p-value < 0.001). There were no associations between area-based SDOH and outcomes.

CONCLUSIONS

Understanding factors associated with decision-making related to ACP after OHCA is critical to optimize counseling for families. Multi-institutional studies are warranted to identify whether these findings are generalizable.

Update in Pediatric Neurocritical Care: What a Neurologist Caring for Critically Ill Children Needs to Know

Currently nearly one-quarter of admissions to pediatric intensive care units (PICUs) worldwide are for neurocritical care diagnoses that are associated with significant morbidity and mortality. Pediatric neurocritical care is a rapidly evolving field with unique challenges due to not only age-related responses to primary neurologic insults and their treatments but also the rarity of pediatric neurocritical care conditions at any given institution. The structure of pediatric neurocritical care services therefore is most commonly a collaborative model where critical care medicine physicians coordinate care and are supported by a multidisciplinary team of pediatric subspecialists, including neurologists. While pediatric neurocritical care lies at the intersection between critical care and the neurosciences, this narrative review focuses on the most common clinical scenarios encountered by pediatric neurologists as consultants in the PICU and synthesizes the recent evidence, best practices, and ongoing research in these cases. We provide an in-depth review of (1) the evaluation and management of abnormal movements (seizures/status epilepticus and status dystonicus); (2) acute weakness and paralysis (focusing on pediatric stroke and select pediatric neuroimmune conditions); (3) neuromonitoring modalities using a pathophysiology-driven approach; (4) neuroprotective strategies for which there is evidence (e.g., pediatric severe traumatic brain injury, post-cardiac arrest care, and ischemic stroke and hemorrhagic stroke); and (5) best practices for neuroprognostication in pediatric traumatic brain injury, cardiac arrest, and disorders of consciousness, with highlights of the 2023 updates on Brain Death/Death by Neurological Criteria. Our review of the current state of pediatric neurocritical care from the viewpoint of what a pediatric neurologist in the PICU needs to know is intended to improve knowledge for providers at the bedside with the goal of better patient care and outcomes.

Temperature Control in Acute Brain Injury: An Update

Temperature control in severe acute brain injury (SABI) is a key component of acute management. This manuscript delves into the complex role of temperature management in SABI, encompassing conditions like traumatic brain injury (TBI), acute ischemic stroke (AIS), intracerebral hemorrhage (ICH), aneurysmal subarachnoid hemorrhage (aSAH), and hypoxemic/ischemic brain injury following cardiac arrest. Fever is a common complication in SABI and is linked to worse neurological outcomes due to increased inflammatory responses and intracranial pressure (ICP). Temperature management, particularly hypothermic temperature control (HTC), appears to mitigate these adverse effects primarily by reducing cerebral metabolic demand and dampening inflammatory pathways. However, the effectiveness of HTC varies across different SABI conditions. In the context of post-cardiac arrest, the impact of HTC on neurological outcomes has shown inconsistent results. In cases of TBI, HTC seems promising for reducing ICP, but its influence on long-term outcomes remains uncertain. For AIS, clinical trials have yet to conclusively demonstrate the benefits of HTC, despite encouraging preclinical evidence. This variability in efficacy is also observed in ICH, aSAH, bacterial meningitis, and status epilepticus. In pediatric and neonatal populations, while HTC shows significant benefits in hypoxic-ischemic encephalopathy, its effectiveness in other brain injuries is mixed. Although the theoretical basis for employing temperature control, especially HTC, is strong, the clinical outcomes differ among various SABI subtypes. The current consensus indicates that fever prevention is beneficial across the board, but the application and effectiveness of HTC are more nuanced, underscoring the need for further research to establish optimal temperature management strategies. Here we provide an overview of the clinical evidence surrounding the use of temperature control in various types of SABI.

Bias between capnometry and venous carbon dioxide during initial assessment of pediatric emergency department patients: A video-based study

Objective

The bias of capnometry (ETCO2) and venous carbon dioxide (vpCO2) among pediatric emergency department (PED) patients triaged to critical care areas is unknown. We aimed to explore correlations and bias between ETCO2 and vpCO2¸and identify predictors of bias.

Methods

This was an observational, video-based, retrospective study comparing ETCO2 and vpCO2. Pediatric patients with simultaneous ETCO2 and vpCO2 data were included. Our primary aim utilized linear regressions to determine correlations and Bland-Altman analysis to assess bias. Our secondary aim utilized multiple regression to identify clinical covariates contributing to bias. Covariates included age, respiratory rate, heart rate, mean arterial blood pressure, capnometry interface, PED diagnosis, and PED disposition.

Results

A total of 200 PED patients with ETCO2 and vpCO2 data were included. The median (interquartile range [IQR]) ETCO2, vpCO2, and ΔCO2 in mmHg were 38 (32, 46), 49 (41, 61), and 11 (4, 20), respectively. ETCO2 (r = 0.76) and ΔCO2 (r = 0.71) were highly correlated with vpCO2. The mean bias between ETCO2 and vpCO2 was -14.1 mmHg (95% confidence interval [CI], -41.9 -13.7). The bias between ETCO2 and vpCO2 increased at higher values of each measure. ETCO2 sampling interface was the only independent predictor of vpCO2 in our multivariate analysis. Patients requiring bag-valve mask (BVM) ventilation had the highest median bias between ETCO2 and vpCO2 (29 mmHg, IQR 15, 37).

Conclusion

ETCO2 and vpCO2 were highly correlated. However, bias increased at higher levels of both ETCO2 and vpCO2. Among PED patients, ETCO2's ability to approximate vpCO2 diminishes with worsening hypercarbic respiratory failure.

Characterization of Circulating Cold Shock Proteins FGF21 and RBM3 in a Multi-Center Study of Pediatric Cardiac Arrest

Fibroblast Growth Factor 21 (FGF21) is a neuroprotective hormone induced by cold exposure that targets the β-klotho co-receptor. β-klotho is abundant in the newborn brain but decreases rapidly with age. RNA-Binding Motif 3 (RBM3) is a potent neuroprotectant upregulated by FGF21 in hypothermic conditions. We characterized serum FGF21 and RBM3 levels in patients enrolled in a prospective multi-center study of pediatric cardiac arrest (CA) via a secondary analysis of samples collected to evaluate brain injury biomarkers. Patients (n = 111) with remnant serum samples available from at least two of three available timepoints (0-24, 24-48 or 48-72 hours post-resuscitation) were included. Serum samples from 20 healthy controls were used for comparison. FGF21 was measured by Luminex and internally validated enzyme-linked immunoassay (ELISA). RBM3 was measured by internally validated ELISA. Of postarrest patients, 98 were managed with normothermia, while 13 were treated with therapeutic hypothermia (TH). FGF21 increased >20-fold in the first 24 hours postarrest versus controls (681 pg/mL [200-1864] vs. 29 pg/mL [15-51], n = 99 vs. 19, respectively, p < 0.0001, median [interquartile range]) with no difference in RBM3. FGF21 did not differ by sex, while RBM3 was increased in females versus males at 48-72 hours postarrest (1866 pg/mL [873-5176] vs. 1045 pg/mL [535-2728], n = 40 vs. 54, respectively, p < 0.05). Patients requiring extracorporeal membrane oxygenation (ECMO) postresuscitation had increased FGF21 versus those who did not at 48-72 hours (6550 pg/mL [1455-66,781] vs. 1213 pg/mL [480-3117], n = 7 vs 74, respectively, p < 0.05). FGF21 and RBM3 did not correlate (Spearman's rho = 0.004, p = 0.97). We conclude that in a multi-center study of pediatric CA patients where normothermic targeted temperature management was largely used, FGF21 was markedly increased postarrest versus control and highest in patients requiring ECMO postresuscitation. RBM3 was sex-dependent. We provide a framework for future studies examining the effect of TH on FGF21 or use of FGF21 therapy after pediatric CA.

The State of the Field of Pediatric Multimodality Neuromonitoring

BACKGROUND

The use of multimodal neuromonitoring in pediatrics is in its infancy relative to adult neurocritical care. Multimodal neuromonitoring encompasses the amalgamation of information from multiple individual neuromonitoring devices to gain a more comprehensive understanding of the condition of the brain. It allows for adaptation to the changing state of the brain throughout various stages of injury with potential to individualize and optimize therapies.

METHODS

Here we provide an overview of multimodal neuromonitoring in pediatric neurocritical care and its potential application in the future.

RESULTS

Multimodal neuromonitoring devices are key to the process of multimodal neuromonitoring, allowing for visualization of data trends over time and ideally improving the ability of clinicians to identify patterns and find meaning in the immense volume of data now encountered in the care of critically ill patients at the bedside. Clinical use in pediatrics requires more study to determine best practices and impact on patient outcomes. Potential uses include guidance for targets of physiological parameters in the setting of acute brain injury, neuroprotection for patients at high risk for brain injury, and neuroprognostication. Implementing multimodal neuromonitoring in pediatric patients involves interprofessional collaboration with the development of a simultaneous comprehensive program to support the use of multimodal neuromonitoring while maintaining the fundamental principles of the delivery of neurocritical care at the bedside.

CONCLUSIONS

The possible benefits of multimodal neuromonitoring are immense and have great potential to advance the field of pediatric neurocritical care and the health of critically ill children.

Association of Pediatric Postcardiac Arrest Ventilation and Oxygenation with Survival Outcomes

Rationale: Adult and pediatric studies provide conflicting data regarding whether post-cardiac arrest hypoxemia, hyperoxemia, hypercapnia, and/or hypocapnia are associated with worse outcomes. Objectives: We sought to determine whether postarrest hypoxemia or postarrest hyperoxemia is associated with lower rates of survival to hospital discharge, compared with postarrest normoxemia, and whether postarrest hypocapnia or hypercapnia is associated with lower rates of survival, compared with postarrest normocapnia. Methods: An embedded prospective observational study during a multicenter interventional cardiopulmonary resuscitation trial was conducted from 2016 to 2021. Patients ⩽18 years old and with a corrected gestational age of ≥37 weeks who received chest compressions for cardiac arrest in one of the 18 intensive care units were included. Exposures during the first 24 hours postarrest were hypoxemia, hyperoxemia, or normoxemia-defined as lowest arterial oxygen tension/pressure (PaO2) <60 mm Hg, highest PaO2 ⩾200 mm Hg, or every PaO2 60-199 mm Hg, respectively-and hypocapnia, hypercapnia, or normocapnia, defined as lowest arterial carbon dioxide tension/pressure (PaCO2) <30 mm Hg, highest PaCO2 ⩾50 mm Hg, or every PaCO2 30-49 mm Hg, respectively. Associations of oxygenation and carbon dioxide group with survival to hospital discharge were assessed using Poisson regression with robust error estimates. Results: The hypoxemia group was less likely to survive to hospital discharge, compared with the normoxemia group (adjusted relative risk [aRR] = 0.71; 95% confidence interval [CI] =  0.58-0.87), whereas survival in the hyperoxemia group did not differ from that in the normoxemia group (aRR = 1.0; 95% CI = 0.87-1.15). The hypercapnia group was less likely to survive to hospital discharge, compared with the normocapnia group (aRR = 0.74; 95% CI = 0.64-0.84), whereas survival in the hypocapnia group did not differ from that in the normocapnia group (aRR = 0.91; 95% CI = 0.74-1.12). Conclusions: Postarrest hypoxemia and hypercapnia were each associated with lower rates of survival to hospital discharge.

Postcardiac Arrest Care Delivery in Pediatric Intensive Care Units: A Plan and Call to Action

Background

Despite national pediatric postcardiac arrest care (PCAC) guidelines to improve neurological outcomes and survival, there are limited studies describing PCAC delivery in pediatric institutions. This study aimed to describe PCAC delivery in centers belonging to a resuscitation quality collaborative.

Methods

An institutional review board-approved REDCap survey was distributed electronically to the lead resuscitation investigator at each institution in the international Pediatric Resuscitation Quality Improvement Collaborative. Data were summarized using descriptive statistics. A chi-square test was used to compare categorical data.

Results

Twenty-four of 47 centers (51%) completed the survey. Most respondents (58%) belonged to large centers (>1,000 annual pediatric intensive care unit admissions). Sixty-seven percent of centers reported no specific process to initiate PCAC with the other third employing order sets, paper forms, or institutional guidelines. Common PCAC targets included temperature (96%), age-based blood pressure (88%), and glucose (75%). Most PCAC included electroencephalogram (75%), but neuroimaging was only included at 46% of centers. Duration of PCAC was either tailored to clinical improvement and neurological examination (54%) or time-based (45%). Only 25% of centers reported having a mechanism for evaluating PCAC adherence. Common barriers to effective PCAC implementation included lack of time and limited training opportunities.

Conclusions

There is wide variation in PCAC delivery among surveyed pediatric institutions despite national guidelines to standardize and implement PCAC.

Association of temperature management strategy with fever in critically ill children after out-of-hospital cardiac arrest

Objective

To determine whether ICU temperature management strategy is associated with fever in children with return of spontaneous circulation (ROSC) after out-of-hospital cardiac arrest (OHCA).

Methods

We conducted a single-center retrospective cohort study at a quaternary Children's hospital between 1/1/2016-31/12/2020. Mechanically ventilated children (<18 y/o) admitted to Pediatric or Cardiac ICU (PICU/CICU) with ROSC after OHCA who survived at least 72 h were included. Primary exposure was initial PICU/CICU temperature management strategy of: (1) passive management; or (2) warming with an air-warming blanket; or (3) targeted temperature management with a heating/cooling (homeothermic) blanket. Primary outcome was fever (≥38°C) within 72 h of admission.

Results

Over the study period, 111 children with ROSC after OHCA were admitted to PICU/CICU, received mechanical ventilation and survived at least 72 h. Median age was 31 (IQR 6-135) months, 64% (71/111) were male, and 49% (54/111) were previously healthy. Fever within 72 h of admission occurred in 51% (57/111) of patients. The choice of initial temperature management strategy was associated with occurrence of fever (χ2 = 9.36, df = 2, p = 0.009). Fever occurred in 60% (43/72) of patients managed passively, 45% (13/29) of patients managed with the air-warming blanket and 10% (1/10) of patients managed with the homeothermic blanket. Compared to passive management, use of homeothermic, but not of air-warming, blanket reduced fever risk [homeothermic: Risk Ratio (RR) = 0.17, 95%CI 0.03-0.69; air-warming: RR = 0.75, 95%CI 0.46-1.12]. To prevent fever in one child using a homeothermic blanket, number needed to treat (NNT) = 2.

Conclusion

In critically ill children with ROSC after OHCA, ICU temperature management strategy is associated with fever. Use of a heating/cooling blanket with homeothermic feedback reduces fever incidence during post-arrest care.

Multimodal neuromonitoring in the pediatric intensive care unit

Neuromonitoring is used to assess the central nervous system in the intensive care unit. The purpose of neuromonitoring is to detect neurologic deterioration and intervene to prevent irreversible nervous system dysfunction. Neuromonitoring starts with the standard neurologic examination, which may lag behind the pathophysiologic changes. Additional modalities including continuous electroencephalography (CEEG), multiple physiologic parameters, and structural neuroimaging may detect changes earlier. Multimodal neuromonitoring now refers to an integrated combination and display of non-invasive and invasive modalities, permitting tailored treatment for the individual patient. This chapter reviews the non-invasive and invasive modalities used in pediatric neurocritical care.

Mortality and Timing of Withdrawal of Life-Sustaining Therapies After Out-of-Hospital Cardiac Arrest: Two-Center Retrospective Pediatric Cohort Study

OBJECTIVES

Pediatric out-of-hospital cardiac arrest (OHCA) is associated with substantial morbidity and mortality. Limited data exist to guide timing and method of neurologic prognostication after pediatric OHCA, making counseling on withdrawal of life-sustaining therapies (WLSTs) challenging. This study investigates the timing and mode of death after pediatric OHCA and factors associated with mortality. Additionally, this study explores delayed recovery after comatose examination on day 3 postarrest.

DESIGN

This is a retrospective, observational study based on data collected from hospital databases and chart reviews.

SETTING

Data collection occurred in two pediatric academic hospitals between January 1, 2016, and December 31, 2020.

PATIENTS

Patients were identified from available databases and electronic medical record queries for the International Classification of Diseases , 10th Edition (ICD-10) code I46.9 (Cardiac Arrest). Patient inclusion criteria included age range greater than or equal to 48 hours to less than 18 years, OHCA within 24 hours of admission, greater than or equal to 1 min of cardiopulmonary resuscitation, and return-of-spontaneous circulation for greater than or equal to 20 min.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

One hundred thirty-five children (65% male) with a median age of 3 years (interquartile range 0.6-11.8) met inclusion criteria. Overall, 63 of 135 patients (47%) died before hospital discharge, including 34 of 63 patients (54%) after WLST. Among these, 20 of 34 patients underwent WLST less than or equal to 3 days postarrest, including 10 of 34 patients who underwent WLST within 1 day. WLST occurred because of poor perceived neurologic prognosis in all cases, although 7 of 34 also had poor perceived systemic prognosis. Delayed neurologic recovery from coma on day 3 postarrest was observed in 7 of 72 children (10%) who ultimately survived to discharge.

CONCLUSIONS

In our two centers between 2016 and 2020, more than half the deaths after pediatric OHCA occurred after WLST, and a majority of WLST occurred within 3 days postarrest. Additional research is warranted to determine optimal timing and predictors of neurologic prognosis after pediatric OHCA to better inform families during goals of care discussions.

Association between ASL MRI-derived cerebral blood flow and outcomes after pediatric cardiac arrest

AIM

Cerebral blood flow (CBF) is dysregulated after cardiac arrest. It is unknown if post-arrest CBF is associated with outcome. We aimed to determine the association of CBF derived from arterial spin labelling (ASL) MRI with outcome after pediatric cardiac arrest.

METHODS

Retrospective observational study of patients ≤18 years who had a clinically obtained brain MRI within 7 days of cardiac arrest between June 2005 and December 2019. Primary outcome was unfavorable neurologic status: change in Pediatric Cerebral Performance Category (PCPC) ≥1 from pre-arrest that resulted in hospital discharge PCPC 3-6. We measured CBF in whole brain and regions of interest (ROIs) including frontal, parietal, and temporal cortex, caudate, putamen, thalamus, and brainstem using pulsed ASL. We compared CBF between outcome groups using Wilcoxon Rank-Sum and performed logistic regression to associate each region's CBF with outcome, accounting for age, sex, and time between arrest and MRI.

RESULTS

Forty-eight patients were analyzed (median age 2.8 [IQR 0.95, 8.8] years, 65% male). Sixty-nine percent had unfavorable outcome. Time from arrest to MRI was 4 [3,5] days and similar between outcome groups (p = 0.39). Whole brain median CBF was greater for unfavorable compared to favorable groups (28.3 [20.9,33.0] vs. 19.6 [15.3,23.1] ml/100 g/min, p = 0.007), as was CBF in individual ROIs. Greater CBF in the whole brain and individual ROIs was associated with higher odds of unfavorable outcome after controlling for age, sex, and days from arrest to MRI (aOR for whole brain 19.08 [95% CI 1.94, 187.41]).

CONCLUSION

CBF measured 3-5 days after pediatric cardiac arrest by ASL MRI was independently associated with unfavorable outcome.

Neuromonitoring in Children with Traumatic Brain Injury

Traumatic brain injury remains a major cause of mortality and morbidity in children across the world. Current management based on international guidelines focuses on a fixed therapeutic target of less than 20 mm Hg for managing intracranial pressure and 40-50 mm Hg for cerebral perfusion pressure across the pediatric age group. To improve outcome from this complex disease, it is essential to understand the pathophysiological mechanisms responsible for disease evolution by using different monitoring tools. In this narrative review, we discuss the neuromonitoring tools available for use to help guide management of severe traumatic brain injury in children and some of the techniques that can in future help with individualizing treatment targets based on advanced cerebral physiology monitoring.

Neuromonitoring after Pediatric Cardiac Arrest: Cerebral Physiology and Injury Stratification

BACKGROUND

Significant long-term neurologic disability occurs in survivors of pediatric cardiac arrest, primarily due to hypoxic-ischemic brain injury. Postresuscitation care focuses on preventing secondary injury and the pathophysiologic cascade that leads to neuronal cell death. These injury processes include reperfusion injury, perturbations in cerebral blood flow, disturbed oxygen metabolism, impaired autoregulation, cerebral edema, and hyperthermia. Postresuscitation care also focuses on early injury stratification to allow clinicians to identify patients who could benefit from neuroprotective interventions in clinical trials and enable targeted therapeutics.

METHODS

In this review, we provide an overview of postcardiac arrest pathophysiology, explore the role of neuromonitoring in understanding postcardiac arrest cerebral physiology, and summarize the evidence supporting the use of neuromonitoring devices to guide pediatric postcardiac arrest care. We provide an in-depth review of the neuromonitoring modalities that measure cerebral perfusion, oxygenation, and function, as well as neuroimaging, serum biomarkers, and the implications of targeted temperature management.

RESULTS

For each modality, we provide an in-depth review of its impact on treatment, its ability to stratify hypoxic-ischemic brain injury severity, and its role in neuroprognostication.

CONCLUSION

Potential therapeutic targets and future directions are discussed, with the hope that multimodality monitoring can shift postarrest care from a one-size-fits-all model to an individualized model that uses cerebrovascular physiology to reduce secondary brain injury, increase accuracy of neuroprognostication, and improve outcomes.

A quest for an integrated management system of children following a drowning incident: A review of the literature

PURPOSE

Management of children following a drowning incident is based on specific interventions which are used in the prehospital environment, the emergency department (ED) and the Paediatric Intensive Care Unit (PICU). This paper presents a review of the literature to map and describe the management and interventions used by healthcare professionals when managing a child following a drowning incident. Of specific interest was to map, synthesise and describe the management and interventions according to the different clinical domains or practice areas of healthcare professionals.

DESIGN AND METHODS

A traditional review of the literature was performed to appraise, map and describe information from 32 relevant articles. Four electronic databases were searched using search strings and the Boolean operators AND as well as OR. The included articles were all published in English between 2010 and 2022, as it comprised a timeline including current guidelines and practices necessary to describe management and interventions.

RESULTS

Concepts and phrases from the literature were used as headings to form a picture or overview of the interventions used for managing a child following a drowning incident. Information extracted from the literature was mapped under management and interventions for prehospital, the ED and the PICU and a figure was constructed to display the findings. It was evident from the literature that management and interventions are well researched, evidence-informed and discussed, but no clear arguments or examples could be found to link the interventions for integrated management from the scene of drowning through to the PICU. Cooling and/or rewarming techniques and approaches and termination of resuscitation were found to be discussed as interventions, but no evidence of integration from prehospital to the ED and beyond was found. The review also highlighted the absence of parental involvement in the management of children following a drowning incident.

PRACTICE IMPLICATIONS

Mapping the literature enables visualisation of management and interventions used for children following a drowning incident. Integration of these interventions can collaboratively be done by involving the healthcare practitioners to form a link or chain for integrated management from the scene of drowning through to the PICU.

Trends in community response and long-term outcomes from pediatric cardiac arrest: A retrospective observational study

AIM

This study aimed to investigate trends over time in pre-hospital factors for pediatric out-of-hospital cardiac arrest (pOHCA) and long-term neurological and neuropsychological outcomes. These have not been described before in large populations.

METHODS

Non-traumatic arrest patients, 1 day-17 years old, presented to the Sophia Children's Hospital from January 2002 to December 2020, were eligible for inclusion. Favorable neurological outcome was defined as Pediatric Cerebral Performance Categories (PCPC) 1-2 or no difference with pre-arrest baseline. The trend over time was tested with multivariable logistic and linear regression models with year of event as independent variable.

FINDINGS

Over a nineteen-year study period, the annual rate of long-term favorable neurological outcome, assessed at a median 2.5 years follow-up, increased significantly (OR 1.10, 95%-CI 1.03-1.19), adjusted for confounders. Concurrently, annual automated external defibrillator (AED) use and, among adolescents, initial shockable rhythm increased significantly (OR 1.21, 95% CI 1.10-1.33 and OR 1.15, 95% CI 1.02-1.29, respectively), adjusted for confounders. For generalizability purposes, only the total intelligence quotient (IQ) was considered for trend analysis of all tested domains. Total IQ scores and bystander basic life support (BLS) rate did not change significantly over time.

INTERPRETATION

Long-term favorable neurological outcome, assessed at a median 2.5 years follow-up, improved significantly over the study period. Total IQ scores did not significantly change over time. Furthermore, AED use (OR 1.21, 95%CI 1.10-1.33) and shockable rhythms among adolescents (OR1.15, 95%CI 1.02-1.29) increased over time.

Association of blood pressure with neurologic outcome at hospital discharge after pediatric cardiac arrest resuscitation

BACKGROUND

Poor outcomes are associated with post cardiac arrest blood pressures <5th percentile for age. We aimed to study the relationship of mean arterial pressure (MAP) with favorable neurologic outcome following cardiac arrest and return of spontaneous circulation (ROSC).

METHODS

This retrospective, multi-center, observational study analyzed data from the Pediatric Resuscitation Quality Collaborative (pediRES-Q). Children (<18 years) who achieved ROSC following index in-hospital or out-of-hospital cardiac arrest and survived ≥6 hours were included. Lowest documented MAP within the first 6 hours of ROSC was percentile adjusted for age and categorized into six groups - Group I: <5th, II: 5-24th, III: 25-49th, IV: 50-74th, V: 75-94th; and VI: 95-100th percentile. Primary outcome was favorable neurologic status at hospital discharge, defined as PCPC score 1, 2, or no change from pre-arrest baseline. Multivariable logistic regression was performed to analyze the association of MAP group with favorable outcome, controlling for illness category (surgical-cardiac), initial rhythm (shockable), arrest time (weekend or overnight), age, CPR duration, and clustering by site.

RESULTS

787 patients were included: median [Q1,Q3] age 17.9 [4.8,90.6] months; male 58%; OHCA 21%; shockable rhythm 13%; CPR duration 7 [3,16] min; favorable neurologic outcome 54%. Median lowest documented MAP percentile for the favorable outcome group was 13 [3,43] versus 8 [1,37] for the unfavorable group. The distribution of blood pressures by MAP group was I: 37%, II: 28%, III: 13%, IV: 11%, V: 7%, and VI: 4%. Compared with patients in Group I (<5%ile), Groups II, III, and IV had higher odds of favorable outcome (aOR, 1.84 [95% CI, 1.24, 2.73]; 2.20 [95% CI, 1.32, 3.68]; 1.90 [95% CI, 1.12, 3.25]). There was no association between Groups V or VI and favorable outcome (aOR, 1.44 [95% CI, 0.75, 2.80]; 1.11 [95% CI, 0.47, 2.59]).

CONCLUSION

In the first 6-hours post-ROSC, a lowest documented MAP between the 5th-74th percentile for age was associated with favorable neurologic outcome compared to MAP <5th percentile for age.