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Acute maternal hyperoxygenation to predict hypoxia and need for emergency intervention in fetuses with transposition of the great arteries: a pilot study.
J Am Soc Echocardiogr
January 2025
Department of Congenital Heart Disease, Evelina London Children's Hospital, Guy's & St Thomas' NHS Trust, Westminster Bridge Road, London SE1 7EH, UK; School of Biomedical Engineering & Imaging Sciences, King's College London, London, UK.
Background: Newborns with transposition of the great arteries (TGA) are at risk of severe hypoxia from inadequate atrial mixing, closure of the arterial duct and/or pulmonary hypertension (PPHN). Acute maternal hyperoxygenation (AMH) might assist in identifying at-risk fetuses. We report pulmonary vasoreactivity to AMH in TGA fetuses and its relationship to early postnatal hypoxia and requirement for emergency balloon atrial septostomy (e-BAS).
View Article and Find Full Text PDFHigh Altitude Pulmonary Edema Associated with Climbing Mount Fuji: A Case Report.
Intern Med
January 2025
Department of Medicine, Division of Respiratory Medicine and Allergology, Showa University School of Medicine, Japan.
A 51-year-old man presented to the emergency department with rapidly progressive dyspnea that developed while climbing Mount Fuji. He had climbed Mount Fuji twice without experiencing similar symptoms. On arrival, his oxygen saturation was 91% on 10 L/min of oxygen with a non-rebreather mask.
View Article and Find Full Text PDFNovel Pharyngeal Oxygen Delivery Device Provides Superior Oxygenation during Simulated Cardiopulmonary Resuscitation.
Prehosp Disaster Med
December 2024
Baylor College of Medicine, Temple, TexasUSA.
Introduction: Passive oxygenation with non-rebreather face mask (NRFM) has been used during cardiac arrest as an alternative to positive pressure ventilation (PPV) with bag-valve-mask (BVM) to minimize chest compression disruptions. A dual-channel pharyngeal oxygen delivery device (PODD) was created to open obstructed upper airways and provide oxygen at the glottic opening. It was hypothesized for this study that the PODD can deliver oxygen as efficiently as BVM or NRFM and oropharyngeal airway (OPA) in a cardiopulmonary resuscitation (CPR) manikin model.
View Article and Find Full Text PDFVentilation or aerosol extraction: comparing the efficacy of directional air purifiers, HEPA evacuators and negative-pressure environments.
J Hosp Infect
January 2025
Department of Energy and Refrigerating Air-conditioning Engineering, National Taipei University of Technology, Taipei, Taiwan.
Background: This study evaluated aerosol exposure during various respiratory activities (breathing, tachypnea, coughing, and oxygen therapy) in environments with directional air purifiers (DAPs), HEPA evacuators, and standard negative pressure (SNP) rooms to explore potential alternatives for addressing isolation room shortages.
Methods: Aerosol exposure was measured during various breathing conditions (normal, tachypnea, coughing, and recovery) with non-rebreather masks (NRMs) and nasal cannulas. The study analysed aerosol velocity and concentrations at the head, trunk and feet of a mannequin across settings including DAP, HEPA evacuator, SNP room, their combinations, and a reference group without intervention.
Supplemental oxygen for pulmonary embolism (SO-PE): study protocol for a mechanistic, randomised, blinded, cross-over study.
BMJ Open
November 2024
Department of Emergency Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
Background: Acute pulmonary embolism (PE) mortality is linked to abrupt rises in pulmonary artery (PA) pressure due to mechanical obstruction and pulmonary vasoconstriction, leading to right ventricular (RV) dilation, increased RV wall tension and oxygen demand, but compromised right coronary artery oxygen supply. Oxygen is a known pulmonary vasodilator, and in preclinical animal models of PE, supplemental oxygen reduces PA pressures and improves RV function. However, the mechanisms driving these interactions, especially in humans, remain poorly understood.
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