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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">Oxidative stress is an intrinsic part of the chain of events leading to inflammation of the airways caused by bacterial infection&#46; The aim of this study was to determine whether analysis of exhaled breath condensate from patients with severe lung infections reveals changes in the redox state at the airway surface&#46;</p> <span class="elsevierStyleSectionTitle">Patients and methods</span><p class="elsevierStyleSimplePara elsevierViewall">The study included a total of 48 subjects divided into 4 groups&#58; individuals without respiratory disease &#40;n&#61;14&#41;&#44; patients with multilobar pneumonia &#40;n&#61;13&#41;&#44; patients who had chronic obstructive pulmonary disease with superinfection &#40;n&#61;14&#41;&#44; and mechanically ventilated patients with severe pneumonia &#40;n&#61;7&#41;&#46; A sample of exhaled breath condensate was obtained within the first 72 hours of hospital admission and the concentrations of nitrite&#44; nitrate&#44; 8-isoprostane&#44; and myeloperoxidase &#40;MPO&#41; were determined&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">Significant differences in the concentrations of nitrite&#44; 8-isoprostane&#44; and MPO were observed between patients and individuals without respiratory disease but no differences were found between the 3 patient groups&#46; The concentration of MPO was correlated with the concentrations of 8-isoprostane and nitrate&#44; which were normalized to the nitrite concentration&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">Analysis of the concentrations of 8-isoprostane and MPO in exhaled breath condensate allows assessment of oxidative stress in the airways of patients with severe lung infections&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">El estr&#233;s oxidativo forma parte esencial de la cadena de acontecimientos que conducen al estado inflama-torio de la v&#237;a a&#233;rea tras la agresi&#243;n bacteriana&#46; El objetivo del presente trabajo ha sido investigar si el an&#225;lisis del condensado del vapor exhalado &#40;CER&#41; de pacientes con infecci&#243;n pulmonar grave refleja las alteraciones del estado oxidativo de la interfase a&#233;rea&#46;</p> <span class="elsevierStyleSectionTitle">Pacientes y m&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se ha estudiado a un total de 48 pacientes divididos en 4 grupos&#58; sujetos sin enfermedad respiratoria &#40;n &#61; 14&#41;&#44; pacientes con neumon&#237;a multilobular &#40;n &#61; 13&#41;&#44; con enfermedad pulmonar obstructiva cr&#243;nica sobreinfectados &#40;n &#61; 14&#41; y con neumon&#237;a grave ventilados mec&#225;nicamente &#40;n &#61; 7&#41;&#46; Se obtuvo una muestra de CER en las primeras 72 h tras el ingreso y se determin&#243; la concentraci&#243;n de nitrito&#44; nitrato&#44; 8-isoprostano y mieloperoxidasa &#40;MPO&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">Se apreciaron variaciones significativas de la concentraci&#243;n de nitrito&#44; 8-isoprostano y MPO en los pacientes respecto del grupo control&#44; pero no entre los diferentes grupos de pacientes&#46; La concentraci&#243;n de MPO se rela-cion&#243; con las concentraciones de 8-isoprostano y nitrato normalizadas para el valor de nitrito&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">El an&#225;lisis de la concentraci&#243;n de 8-isoprostano y MPO en el CER permite apreciar el estr&#233;s oxidativo en la interfase a&#233;rea de los pacientes con infecci&#243;n pulmonar grave&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara">This work was funded by grants from the Spanish Society of Pulmonology and Thoracic Surgery &#40;SEPAR&#41; 2002 and Red Respira &#40;ISCiii RTIC 03&#47;111&#44; project CER&#41;&#46;</p>"
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Original Articles
Analysis of Oxidative Stress in Exhaled Breath Condensate From Patients With Severe Pulmonary Infections
P.V. Romeroa,
Corresponding author
pvromero@csub.scs.es

Correspondence: Dr. P.V. Romero. Laboratorio de Función Pulmonar. Servicio de Neumología. Hospital Universitario de Bellvitge. IDIBELL. Feixa Llarga, s/n. 08907 L'Hospitalet de Llobregat. Barcelona. España
, B. Rodrígueza, S. Martíneza, R. Cañizaresb, D. Sepúlvedab, F. Manresaa
a Servicio de Neumología, Hospital Universitario de Bellvitge, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
b Servicio de Medicina Intensiva, Hospital Universitario de Bellvitge, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">Oxidative stress is an intrinsic part of the chain of events leading to inflammation of the airways caused by bacterial infection&#46; The aim of this study was to determine whether analysis of exhaled breath condensate from patients with severe lung infections reveals changes in the redox state at the airway surface&#46;</p> <span class="elsevierStyleSectionTitle">Patients and methods</span><p class="elsevierStyleSimplePara elsevierViewall">The study included a total of 48 subjects divided into 4 groups&#58; individuals without respiratory disease &#40;n&#61;14&#41;&#44; patients with multilobar pneumonia &#40;n&#61;13&#41;&#44; patients who had chronic obstructive pulmonary disease with superinfection &#40;n&#61;14&#41;&#44; and mechanically ventilated patients with severe pneumonia &#40;n&#61;7&#41;&#46; A sample of exhaled breath condensate was obtained within the first 72 hours of hospital admission and the concentrations of nitrite&#44; nitrate&#44; 8-isoprostane&#44; and myeloperoxidase &#40;MPO&#41; were determined&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">Significant differences in the concentrations of nitrite&#44; 8-isoprostane&#44; and MPO were observed between patients and individuals without respiratory disease but no differences were found between the 3 patient groups&#46; The concentration of MPO was correlated with the concentrations of 8-isoprostane and nitrate&#44; which were normalized to the nitrite concentration&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">Analysis of the concentrations of 8-isoprostane and MPO in exhaled breath condensate allows assessment of oxidative stress in the airways of patients with severe lung infections&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">El estr&#233;s oxidativo forma parte esencial de la cadena de acontecimientos que conducen al estado inflama-torio de la v&#237;a a&#233;rea tras la agresi&#243;n bacteriana&#46; El objetivo del presente trabajo ha sido investigar si el an&#225;lisis del condensado del vapor exhalado &#40;CER&#41; de pacientes con infecci&#243;n pulmonar grave refleja las alteraciones del estado oxidativo de la interfase a&#233;rea&#46;</p> <span class="elsevierStyleSectionTitle">Pacientes y m&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se ha estudiado a un total de 48 pacientes divididos en 4 grupos&#58; sujetos sin enfermedad respiratoria &#40;n &#61; 14&#41;&#44; pacientes con neumon&#237;a multilobular &#40;n &#61; 13&#41;&#44; con enfermedad pulmonar obstructiva cr&#243;nica sobreinfectados &#40;n &#61; 14&#41; y con neumon&#237;a grave ventilados mec&#225;nicamente &#40;n &#61; 7&#41;&#46; Se obtuvo una muestra de CER en las primeras 72 h tras el ingreso y se determin&#243; la concentraci&#243;n de nitrito&#44; nitrato&#44; 8-isoprostano y mieloperoxidasa &#40;MPO&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">Se apreciaron variaciones significativas de la concentraci&#243;n de nitrito&#44; 8-isoprostano y MPO en los pacientes respecto del grupo control&#44; pero no entre los diferentes grupos de pacientes&#46; La concentraci&#243;n de MPO se rela-cion&#243; con las concentraciones de 8-isoprostano y nitrato normalizadas para el valor de nitrito&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">El an&#225;lisis de la concentraci&#243;n de 8-isoprostano y MPO en el CER permite apreciar el estr&#233;s oxidativo en la interfase a&#233;rea de los pacientes con infecci&#243;n pulmonar grave&#46;</p>"
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      0 => array:1 [
        "nota" => "<p class="elsevierStyleNotepara">This work was funded by grants from the Spanish Society of Pulmonology and Thoracic Surgery &#40;SEPAR&#41; 2002 and Red Respira &#40;ISCiii RTIC 03&#47;111&#44; project CER&#41;&#46;</p>"
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