Los pacientes sépticos en terapia intensiva no tienen mayores niveles sistémicos de especies reactivas de oxígeno (ROS) que los voluntarios sanos

2017 
Introduccion . El dano oxidativo es postulado como parte de la fisiopatologia de la sepsis. Las especies reactivas de oxigeno (reactive oxygen species, ROS) serian su causa. No hay evidencia de los niveles de ROS medidos en sangre venosa en pacientes septicos y su relacion con la mortalidad en terapia intensiva (UTI). Objetivos. Observar si hay diferencias entre los niveles de ROS medidos en sangre venosa en pacientes septicos y aquellos obtenidos en controles sanos y determinar si los pacientes que mueren en UTI tienen niveles de ROS mas altos que los que sobreviven. Material y metodos. Estudio prospectivo observacional. Se incluyeron pacientes  septicos internados en UTI mayores de 18 anos y menores 80 anos entre 2014 y 2016 y voluntarios sanos. Se excluyeron pacientes embarazadas. Se midio con la tecnica de diclorofluorosceina. Resultados. No hubo diferencias significativas en los niveles de ROS medidos con diclorofluorosceina entre pacientes septicos y voluntarios sanos (emision media: 0,1 contra 0,109 [p = 0,36]) ni entre los pacientes que morian en la internacion en UTI y los que sobrevivian (emision media, 0,103 contra 0,099 [p = 0,7]).  Conclusiones. Los pacientes septicos no tienen mayores niveles de ROS sistemicos que los voluntarios sanos y los pacientes que mueren en terapia no tienen mayores niveles de ROS sistemicos que aquellos que sobreviven. Los niveles de ROS en sangre venosa no serian parte de la fisiopatologia de la sepsis. Palabras clave. Sepsis, dano oxidativo, especies reactivas de oxigeno. SEPTIC PATIENTS IN THE INTENSIVE CARE UNIT DO NOT HAVE HIGHER SYSTEMIC LEVELS OF REACTIVE OXYGEN SPECIES (ROS) THAN HEALTHY VOLUNTEERS Abstract Introduction. Oxidative damage is postulated as part of the  pathophysiology of sepsis. The reactive oxygen species (ROS) would be the cause of said damage. There is no evidence of ROS levels in septic patients’ venous blood and their association with mortality in the intensive care unit (ICU). Goals. To observe if there are differences between ROS levels measured in venous blood in septic patients and those obtained in healthy controls, and to determine whether patients who die in an ICU have higher ROS levels than those who survive. Material and methods. Prospective observational study. We included septic patients hospitalized in ICUs above 18 years and below 80 years of age between 2014 and 2016, and healthy volunteers. Pregnant patients were excluded. Levels were measured through dichlorofluororescein technique. Results. There were no significant differences in ROS levels measured through dichlorofluororescein technique between septic patients and healthy volunteers (mean emission, 0.1 vs 0.109 [p = 0.36]) or between patients dying while being hospitalized in the ICU and those who survived (mean emission, 0.103 vs. 0.099 [p = 0.7]). Conclusions. Septic patients do not have higher systemic ROS levels than healthy volunteers, and patients who die while being in intensive care do not have higher systemic ROS levels than those who survive. ROS levels in venous blood would not be part of the pathophysiology of sepsis. Key words . Sepsis, oxidative damage, reactive oxygen species.
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