Publications by authors named "Peter M Mourani"

Objectives: To describe frequency of, and risk factors, for change in caregiver employment among critically ill children with acute respiratory failure.

Design: Preplanned secondary analysis of prospective cohort dataset, 2018-2021.

Setting: Quaternary Children's Hospital PICU.

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Article Synopsis
  • Viral lower respiratory tract infection (vLRTI) significantly impacts global child health, prompting research into the host immune responses using proteomics for better understanding and diagnosis.
  • The study analyzed 1,305 proteins from tracheal aspirate and plasma of 62 critically ill children, finding 200 differentially expressed proteins that reveal key immune responses, with a robust nine-protein TA classifier showing high diagnostic accuracy (AUC of 0.96).
  • It also highlighted the limited correlation between tracheal aspirate and plasma proteins and examined how viral load and bacterial co-infections influence immune signaling pathways.
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Secondary bacterial pneumonia (2°BP) is associated with significant morbidity following respiratory viral infection, yet remains incompletely understood. In a prospective cohort of 112 critically ill adults intubated for COVID-19, we comparatively assess longitudinal airway microbiome dynamics and the pulmonary transcriptome of patients who developed 2°BP versus controls who did not. We find that 2°BP is significantly associated with both mortality and corticosteroid treatment.

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Article Synopsis
  • Viral lower respiratory tract infection (vLRTI) is a major cause of pediatric hospitalization and mortality globally, yet the immune responses involved are not well understood.
  • A study analyzed over 1,300 proteins in tracheal aspirate and plasma from critically ill children, identifying significant protein changes linked to vLRTI and developing a diagnostic tool with high accuracy.
  • Key findings included increased interferon and T cell responses in the lower airway, distinct protein profiles in plasma, and novel protein biomarkers that could enhance diagnostic approaches for severe vLRTI.
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Introduction: Sepsis-induced degradation of endothelial glycocalyx heparan sulfate (HS) contributes to the pulmonary microvascular endothelial injury characteristic of acute respiratory distress syndrome (ARDS) pathogenesis. Our objectives were to (1) examine relationships between plasma indices of HS degradation and protein biomarkers of endothelial injury and (2) identify patient subgroups characterized by distinct profiles of HS degradation in children with ARDS. Methods: We analyzed prospectively collected plasma (2018-2020) from a cohort of invasively mechanically ventilated children (aged >1 month to <18 years) with ARDS.

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Objective: Maternal hemoglobin A1c (HbA1c) has been suggested to be a predictor of left ventricular hypertrophy (LVH) in the offspring of mothers with pre-gestational diabetes mellitus, although there is little data supporting this contention. We aimed to assess the relationship between maternal HbA1c and postnatal LVH.

Methods: We performed a retrospective cohort study of infants born to mothers with pre-gestational diabetes mellitus from 2015 to 2021 at our institution.

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Background: Tracheal intubation (TI)-associated cardiac arrest (TI-CA) occurs in 1.7% of pediatric ICU TIs. Our objective was to evaluate resuscitation characteristics and outcomes between cardiac arrest patients with and without TI-CA.

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Approximately 1000 children are born every year in the United States with one effective cardiac pumping chamber, or single ventricle heart disease. One of the early causes of mortality in this population is pulmonary arteriovenous malformations (PAVMs), which allow blood to bypass gas exchange in the lungs. PAVMs most frequently occur in children after superior cavopulmonary anastomosis (SCPA), a procedure that redirects venous blood from the upper body to the lungs.

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  • The study focused on pediatric in-hospital CPR events, particularly those involving bradycardia with poor perfusion, to evaluate the effects of early epinephrine on survival outcomes in children.
  • Researchers analyzed data from the ICU-RESUS trial, which involved CPR events that lasted 2 minutes or longer, examining the timing of epinephrine administration and the development of pulselessness.
  • Findings indicated that early epinephrine did not significantly improve the chances of survival or favorable neurological outcomes, while a high percentage of patients experienced pulselessness within the first few minutes of CPR.
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Objectives: Data to support epinephrine dosing intervals during cardiopulmonary resuscitation (CPR) are conflicting. The objective of this study was to evaluate the association between epinephrine dosing intervals and outcomes. We hypothesized that dosing intervals less than 3 minutes would be associated with improved neurologic survival compared with greater than or equal to 3 minutes.

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Antimicrobial resistant (AMR) pathogens represent urgent threats to human health, and their surveillance is of paramount importance. Metagenomic next generation sequencing (mNGS) has revolutionized such efforts, but remains challenging due to the lack of open-access bioinformatics tools capable of simultaneously analyzing both microbial and AMR gene sequences. To address this need, we developed the Chan Zuckerberg ID (CZ ID) AMR module, an open-access, cloud-based workflow designed to integrate detection of both microbes and AMR genes in mNGS and whole-genome sequencing (WGS) data.

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Adult and pediatric studies provide conflicting data regarding whether post-cardiac arrest hypoxemia, hyperoxemia, hypercapnia, and/or hypocapnia are associated with worse outcomes. 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. An embedded prospective observational study during a multicenter interventional cardiopulmonary resuscitation trial was conducted from 2016 to 2021.

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Objectives: To describe family healthcare burden and health resource utilization in pediatric survivors of acute respiratory distress syndrome (ARDS) at 3 and 9 months.

Design: Secondary analysis of a prospective multisite cohort study.

Setting: Eight academic PICUs in the United States (2019-2020).

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Article Synopsis
  • The study developed a 7-point Desirability of Outcome Ranking (DOOR) scale to assess outcomes in children with septic shock, aiming to link it to their health-related quality of life (HRQL) or death over three months.
  • * It involved a secondary analysis of data from the Life After Pediatric Sepsis Evaluation study conducted in 12 U.S. Pediatric Intensive Care Units (PICUs) from 2013 to 2017, focusing on patients aged 1 month to 18 years with septic shock.
  • * The findings revealed fair correlations between the PCC-DOOR scores measured at 7, 14, and 21 days post-admission and outcomes related to HRQL or death, suggesting the scale could be
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Race-based and skin pigmentation-related inaccuracies in pulse oximetry have recently been highlighted in several large electronic health record-based retrospective cohort studies across diverse patient populations and healthcare settings. Overestimation of oxygen saturation by pulse oximeters, particularly in hypoxic states, is disparately higher in Black compared to other racial groups. Compared to adult literature, pediatric studies are relatively few and mostly reliant on birth certificates or maternal race-based classification of comparison groups.

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Objectives: To characterize health-related quality of life (HRQL) and functional recovery trajectories and risk factors for prolonged impairments among critically ill children receiving greater than or equal to 3 days of invasive ventilation.

Design: Prospective cohort study.

Setting: Quaternary children's hospital PICU.

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Antimicrobial resistant lower respiratory tract infections are an increasing public health threat and an important cause of global mortality. The lung microbiome can influence susceptibility of respiratory tract infections and represents an important reservoir for exchange of antimicrobial resistance genes. Studies of the gut microbiome have found an association between age and increasing antimicrobial resistance gene burden, however, corollary studies in the lung microbiome remain absent.

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Background: Many children with severe traumatic brain injury (TBI) receive magnetic resonance imaging (MRI) during hospitalization. There are insufficient data on how different patterns of injury on early MRI inform outcomes.

Methods: Children (3-17 years) admitted in 2010-2021 for severe TBI (Glasgow Coma Scale [GCS] score < 9) were identified using our site's trauma registry.

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  • The study investigated the effectiveness of extracorporeal membrane oxygenation (ECPR) for pediatric patients who did not respond to traditional cardiopulmonary resuscitation (CPR) methods, focusing on early hemodynamics and end-tidal carbon dioxide (ET CO2) levels as potential indicators for survival and neurologic outcomes.
  • Data was collected from 97 ECPR patients across 18 ICUs from 2016-2021, revealing that most patients were under one year old and had congenital heart disease; only 41% of patients survived with favorable neurologic outcomes.
  • The study found no significant differences in blood pressure measures or chest compression rates between those who survived
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Aim: Pediatric cardiopulmonary resuscitation (CPR) guidelines recommend starting CPR for heart rates (HRs) less than 60 beats per minute (bpm) with poor perfusion. Objectives were to (1) compare HRs and arterial blood pressures (BPs) prior to CPR among patients with clinician-reported bradycardia with poor perfusion ("BRADY") vs. pulseless electrical activity (PEA); and (2) determine if hemodynamics prior to CPR are associated with outcomes.

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Background: Supported by laboratory and clinical investigations of adult cardiopulmonary arrest, resuscitation guidelines recommend monitoring end-tidal carbon dioxide (ETCO) as an indicator of cardiopulmonary resuscitation (CPR) quality, but they note that "specific values to guide therapy have not been established in children."

Methods: This prospective observational cohort study was a National Heart, Lung, and Blood Institute-funded ancillary study of children in the ICU-RESUS trial (Intensive Care Unit-Resuscitation Project; NCT02837497). Hospitalized children (≤18 years of age and ≥37 weeks postgestational age) who received chest compressions of any duration for cardiopulmonary arrest, had an endotracheal or tracheostomy tube at the start of CPR, and evaluable intra-arrest ETCO data were included.

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Introduction: Though early hypotension after pediatric in-hospital cardiac arrest (IHCA) is associated with inferior outcomes, ideal post-arrest blood pressure (BP) targets have not been established. We aimed to leverage prospectively collected BP data to explore the association of post-arrest BP thresholds with outcomes. We hypothesized that post-arrest systolic and diastolic BP thresholds would be higher than the currently recommended post-cardiopulmonary resuscitation BP targets and would be associated with higher rates of survival to hospital discharge.

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