James H. Roum

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Cystic fibrosis (CF), a disorder characterized by mutations of the CF transmembrane regulator gene, is characterized in the lung by chronic inflammation, leading to progressive damage to the airway epithelium, bronchiectasis, and chronic obstructive lung disease. One process contributing to the airway derangement is the chronic burden of oxidants released(More)
Cystic fibrosis (CF) is characterized by accumulation of activated neutrophils and macrophages on the respiratory epithelial surface (RES); these cells release toxic oxidants, which contribute to the marked epithelial derangements seen in CF. These deleterious consequences are magnified, since reduced glutathione (GSH), an antioxidant present in high(More)
We report the clinical and histologic findings of lung biopsies from 48 patients with pulmonary Langerhans cell granulomatosis (PLCG) and show how special techniques such as immunohistochemistry, electron microscopy (EM), and high resolution computerized tomography (HRCT) of the lungs can be useful in diagnostically challenging cases. Nineteen patients were(More)
We assessed the nature and progression of airway mucosal disease and muscarinic bronchial reactivity in guinea pigs studied in groups of 4 at 2 h, 6 h, 14 h, 1 day, 2 days, or 4 days after ozone exposure (3.0 ppm for 2 h), and in 1 control group. Muscarinic reactivity was determined by measuring specific airway resistance as a function of increasing doses(More)
Idiopathic pulmonary fibrosis (IPF) is characterised by alveolar inflammation, exaggerated release of oxidants, and subnormal concentrations of the antioxidant glutathione in respiratory epithelial lining fluid (ELF). Glutathione (600 mg twice daily for 3 days) was given by aerosol to 10 patients with IPF. Total ELF glutathione rose transiently, ELF(More)
We examined the effect of ozone (O3) on muscarinic bronchial reactivity in the guinea pig and compared reactivity determined by two different routes of agonist delivery. Reactivity before and from 4 h to 2 days after O3 exposure (3.0 ppm, 2 h) was determined by measuring specific airway resistance upon administration of intravenous acetylcholine and/or(More)
OBJECTIVE An overview of different methodologies used in various intelligent decision support systems (IDSSs) for mechanical ventilation is provided. The applications of the techniques are compared in view of today's intensive care unit (ICU) requirements. METHODS Information available in the literature is utilized to provide a methodological review of(More)
Various human pulmonary diseases are characterized by an increased oxidant burden on the respiratory epithelial surface. As a step toward developing a therapy to augment the antioxidant defenses of respiratory epithelial lining fluid (ELF) of the human lung, we have evaluated the feasibility of aerosolizing a human protein antioxidant to the respiratory(More)
The effects of cyclophosphamide and cortisone acetate treatment on O3-induced changes in airway mucosal morphology and bronchial reactivity were assessed in guinea pigs. Animals in groups of four were studied at 2 or 6 h after O3 (3.0 ppm, 2 h) and in one control group. Reactivity was determined by measuring specific airway resistance during intravenous(More)
OBJECTIVE To describe the clinical outcome of esophageal stenting for repair of distal esophageal perforation in one patient with septic shock and human immunodeficiency virus. DESIGN Case report. SETTING Medical-surgical intensive care units of one university teaching hospital. PATIENT One patient with human immunodeficiency virus infection and(More)