Publications by authors named "Ryan D Coleman"

Objective: To characterize clinical, hemodynamic, imaging, and pathologic findings in children with pulmonary arterial hypertension (PAH) and variants in SRY-box transcription factor 17 (SOX17), a novel risk gene linked to heritable and congenital heart disease-associated PAH.

Study Design: We assembled a multi-institutional cohort of children with PAH and SOX17 variants enrolled in the Pediatric Pulmonary Hypertension Network (PPHNet) and other registries. Subjects were identified through exome and PAH gene panel sequencing.

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Pulmonary hypertension in children is progressive with wide variability in prognosis. This document provides an evidence-based clinical practice guideline for the management of children with progressive pulmonary hypertension despite optimal therapy. A multidisciplinary panel identified pertinent questions regarding the management of children with pulmonary hypertension that has progressed despite optimal therapy, conducted systematic reviews of the relevant literature, and applied the Grading of Recommendations, Assessment, Development and Evaluation approach to develop clinical recommendations.

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IntroductionThis study aimed to characterize the severity of bleeding and its association with short-term neurologic outcomes in pediatric ECMO.MethodsMulticenter retrospective cohort study of pediatric ECMO patients at 10 centers utilizing the Pediatric ECMO Outcomes Registry (PEDECOR) database from December 2013-February 2019. Subjects excluded were post-cardiac surgery patients and those with neonatal pathologies.

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Article Synopsis
  • - A study analyzed pediatric patients under 19 on venoarterial ECMO who developed acute compartment syndrome (ACS), finding that 5.2% were diagnosed with ACS roughly 29 hours after starting ECMO treatment.
  • - Patients with femoral artery cannulation had a significantly higher risk of developing ACS, and among those diagnosed, the in-hospital mortality rate was 56%.
  • - Treatment involved fasciotomies for most patients; however, many had poor muscle health at surgery, leading to a need for further procedures, with varying outcomes regarding function and complications post-surgery.
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Patients with bronchopulmonary dysplasia (BPD) have shown clinical improvement after secundum atrial septal defect (ASD) closure. We sought to determine if this post-ASD closure improvement is secondary to the expected course in BPD patients or related to the closure itself. A novel BPD-ASD score was created to assess patients' clinical status (higher score = worse disease) and applied to 10 BPD-ASD inpatients weighing ≤ 10 kg who underwent ASD closure.

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Patients with pulmonary hypertension associated with congenital heart disease make up an increasing proportion of the total pulmonary hypertension population who bring with them added complexity because of underlying anatomical and hemodynamic abnormalities. Currently, no consensus recommendations are available on how to best manage this group of patients for either the primary cardiologist or pulmonary hypertension subspecialist, including timing of referral. The purposes of this document are (1) to describe the various pulmonary hypertension groups and subgroups associated with congenital heart disease, (2) to describe imaging modalities used in patient evaluation, (3) to elucidate medical and surgical management considerations, (4) to highlight disparities within this population, and (5) to identify gaps and future research needs of patients with pulmonary hypertension associated with congenital heart disease.

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Article Synopsis
  • - The study examines the challenges faced by infants and young children needing lung transplants, particularly issues with extracorporeal membrane oxygenation (ECMO) support due to unstable neck cannulas, which can worsen their condition.
  • - A retrospective case review at Texas Children's Hospital from 2019 to 2021 highlighted the successful use of Berlin Heart EXCOR cannulas in six patients, enabling them to remain stable and undergo rehabilitation while awaiting their transplants.
  • - The innovative use of these cannulas resulted in successful extubation and rehabilitation for most patients, with no significant complications from the cannulation itself, though one patient did unfortunately experience severe complications leading to death.
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Introduction: Hereditary pulmonary arterial hypertension (HPAH) is a rare yet serious type of pulmonary arterial hypertension (PAH). The burden in the pediatric population remains high yet underreported. The objective of this study is to describe the distribution of mutations found on targeted PAH panel testing at a large pediatric referral center.

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  • The study investigated how changes in fetal lung volume after fetoscopic endoluminal tracheal occlusion (FETO) impact survival rates and the necessity of ECMO for infants with congenital diaphragmatic hernia (CDH).
  • MRI metrics were used to assess lung volume and liver herniation, with results showing that a post-FETO increase in total lung volume of less than 10% was a significant predictor for lower survival rates and higher ECMO use.
  • It was concluded that fetuses experiencing less than a 10% increase in lung volume post-FETO face a higher risk of complications, including death and reliance on ECMO, when considering factors like gestational age and CDH severity.
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Selexipag, a selective prostacyclin receptor agonist, is approved for treating pulmonary arterial hypertension in WHO Group 1 adult patients. Compared to parenteral prostacyclin formulations, selexipag offers a significant improvement in patient's and caregiver's quality of life because of its oral formulation, frequency of administration, and mechanism of action. Although experience in the pediatric population is limited to case reports in older adolescent patients and selexipag is not approved for use in the pediatric pulmonary hypertension population, many pediatric centers are expanding the use of this therapy to this population.

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Introduction: Congenital diaphragmatic hernia is associated with pulmonary hypoplasia, pulmonary hypertension, and significant neonatal morbidity. Although intrathoracic liver herniation (LH) >20% is associated with adverse outcomes, the relationship between LH <20% and outcomes is poorly characterized.

Methods: A single-center retrospective cohort study was performed from 2011 to 2020 of 80 fetuses with left-sided congenital diaphragmatic hernia that were delivered and repaired at our institution.

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Context: More than 74% of pediatric deaths occur in an intensive care unit (ICU), with 40% occurring after withdrawal of life-sustaining therapies (WOLST). No needs assessment has described provider needs or suggestions for improving the WOLST process in pediatrics.

Objectives: This study aims to describe interdisciplinary provider self-reported confidence, needs, and suggestions for improving the WOLST process.

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Article Synopsis
  • * Out of the children studied, 15% died in-hospital postprocedure, while 20% of those successfully discharged either died or underwent lung transplantation within an average follow-up of 3.1 years.
  • * Significant clinical improvements were observed in children after the procedure, including better functional ability and a majority being able to stop prostacyclin infusion, but those with severe complications prior to surgery showed poor outcomes.
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Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitides with pulmonary involvement include granulomatosis with polyangiitis, microscopic polyangiitis, and eosinophilic granulomatosis with polyangiitis, and can present with life-threatening pulmonary hemorrhage in up to 40% of patients. Mortality in those patients who require intubation and mechanical ventilation can reach 77%. Extracorporeal membrane oxygenation (ECMO) can be used to support these patients through definitive diagnosis and treatment, although minimizing the risk of ventilator-induced lung injury.

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Pulmonary hypertension (PH), an often unrelenting disease that carries with it significant morbidity and mortality, affects not only the pulmonary vasculature but, in turn, the right ventricle as well. The survival of patients with PH is closely related to the right ventricular function. Therefore, having an understanding of how to manage right ventricular failure (RVF) and acute pulmonary hypertensive crises is imperative for clinicians who encounter these patients.

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Introduction: Dual-lumen cannulas were designed to provide venovenous extracorporeal membrane oxygenation (VV ECMO) with single-vessel access. Anatomic and size considerations may make appropriate placement challenging in children. Dual-lumen cannulas are repositioned in 20-69% of pediatric patients, which can be difficult without transient discontinuation of ECMO support.

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Background: Outcomes for patients with oncologic disease and/or after hematopoietic stem cell transplant (HSCT) requiring intensive care unit admission have improved, but indications for and outcomes after extracorporeal membrane oxygenation (ECMO) support in this population are poorly characterized.

Procedure: We analyzed data from consecutive patients < 18 years with oncologic disease and/or after HSCT reported to a pediatric ECMO registry by nine pediatric centers in the United States between 2011 and 2018.

Results: We identified 18 ECMO patients with oncologic disease and/or HSCT, and 415 ECMO controls matched with a propensity score algorithm based on age, gender, race, severity of illness at admission, and reason for ECMO.

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