Browsing by Author "Aravena León, Carlos Andrés"

Now showing 1 - 11 of 11
  • Thumbnail Image
    Item
    Análisis crítico de un artículo: ¿Es confiable la medición de adenosin deaminasa (ADA) para el diagnóstico de derrame pleural tuberculoso?
    (2009) Herrera Riquelme, Cristian Alberto; Aravena León, Carlos Andrés
    Background: Conventional tests are not always helpful in making a diagnosis of tuberculous pleurisy. Many studies have investigated the usefulness of adenosine deaminase (ADA) in pleural fluid for the early diagnosis of tuberculous pleuresy. We conducted a metaanalysis to determine the accuracy of ADA measurements in the diagnosis of tuberculous pleurisy. Methods: After a systematic review of English language studies, sensitivity, specificity, and other measures of accuracy of ADA concentration in the diagnosis of pleural effusion were pooled using random effects models. Summary receiver operating characteristic curves were used to summarize overall test performance. Results: Sixty-three studies met our inclusion criteria. The summary estimates for ADA in the diagnosis of tuberculous pleurisy in the studies included were sensitivity 0.92 (95% confidence interval 0.90-0.93), specificity 0.90 (95% confidence interval 0.89-0.91), positive likelihood ratio 9.03 (95% confidence interval 7.19-11.35), negative likelihood ratio 0.10 (95% confidence interval 0.07-0.14), and diagnostic odds ratio 110.08 (95% confidence interval 69.96-173.20). Conclusions: ADA determination is a relative sensitive and specific test for the diagnosis of tuberculous pleurisy. Measurement of ADA in pleural effusion is thus likely to be a useful diagnostic tool for tuberculous plerisy. The results of ADA assays should be interpreted in parallel with clinical findings and the results of conventional tests
  • Thumbnail Image
    Item
    Aspergilosis traqueobronquial necrotizante en paciente crítico
    (2015) Andresen Hernández, Max; Venegas Garrido, Carmen Paz; Vega, C.; Aravena León, Carlos Andrés; Andresen V., M.
  • Thumbnail Image
    Item
    CT and physiologic determinants of dyspnea and exercise capacity during the six-minute walk test in mild COPD
    (2013) Díaz, Alejandro A.; Morales, Arturo; Díaz, Juan Carlos; Ramos, Cristóbal; Klaassen Lobos, Julieta Isabel; Saldías Peñafiel, Fernando; Aravena León, Carlos Andrés; Díaz, Rodrigo; Lisboa Basualto, Carmen; Washko, George R.; Díaz, Orlando
  • Thumbnail Image
    Item
    ¿Están preparados los residentes e internos para enseñar?: percepción de estudiantes de medicina de pre y postgrado
    (Sociedad Médica Santiago, 2010) Reyes Abarca, Carlos Patricio; Zuñiga Parada, Denisse Alejandra; Wright Navarrete, Ana Cecilia; Olivares Osorio, Patricia Carolina; Toro Cabrera, Luis Alejandro; Aravena León, Carlos Andrés; Vergara Gutiérrez, Luis Roberto
    Background: Every doctor is expected to be competent in teaching. There are few initiatives to prepare medical students for this role. Aim: To explore residents (graduate students) and interns (final year undergraduate students) perceptions of the importance of acquiring teaching skills and how prepared they feel to meet this role. To, determine the importance that undergraduate students give to such teaching. Material and Methods: Residents and interns participated in focus groups, and completed the Medical Education Readiness Questionnaire (METRQ), 5(th) year medical students were also invited to complete it. Results: Three hundred and seventy seven subjects answered the questionnaire. The perceived importance of having teaching skills was 6.1 +/- 1.2 among residents and 5.7 +/- 1.6 among interns, in a scale 1 to 7. Their perception of their own preparation for teaching was 4.3 +/- 1.6 for both groups in the same scale. Students evaluated the preparation of the residents for teaching as 5.2 +/- 1.6 and that of the interns as 4.4 +/- 1.7. Seventy eight percent of 5(th) year medical students reported to learn more than 2.5 hours a week from residents. Fifty nine percent of residents and 66% of interns reported to teach tip to 2.5 hours per week to the same students. focus groups participants agreed that teaching is an important role for a physician, and that to do it properly requires personal characteristics, along with teaching skills. They also found that the best opportunties to learn how to teach are during practical training. Conclusions. Our Study contributes to the recognition of the teaching role of physicians and the need for teaching training among medical students.
  • Thumbnail Image
    Item
    Idiopathic subglottic stenosis: a review
    (2020) Aravena León, Carlos Andrés; Almeida, F. A.; Mukhopadhyay, S.; Ghosh, S.; Lorenz, R. R.; Murthy, S. C.; Mehta, A. C.
  • Thumbnail Image
    Item
    Minimally Invasive Methods for Staging in Lung Cancer : Systematic Review and Meta-Analysis
    (2016) Labarca, Gonzalo; Aravena León, Carlos Andrés; Ortega, Francisco; Arenas, Alex; Majid, Adnan; Folch, Erik; Mehta, Hiren J.; Jantz, Michael A.; Fernandez Bussy, Sebastian
  • Thumbnail Image
    Item
    Pirfenidone for Idiopathic Pulmonary Fibrosis : A Systematic Review and Meta-Analysis
    (2015) Aravena León, Carlos Andrés; Labarca, Gonzalo; Venegas Garrido, Carmen Paz; Arenas, Alex; Rada G., Gabriel
  • Thumbnail Image
    Item
    Role of Endobronchial Ultrasound-guided Transbronchial Needle Aspiration in the Diagnosis and Management of Mediastinal Cyst
    (2020) Aravena León, Carlos Andrés; Patel, J.; Goyal, A.; Jaber, W.; Khemasuwan, D.; Machuzak, M.; Cicenia, J.; Gildea, T.; Sethi, S.; Mehta, A. C.; Almeida, F. A.
  • Thumbnail Image
    Item
    The use of pretest probability increases the value of high-resolution CT in diagnosing usual interstitial pneumonia
    (2017) Brownell, Robert; Moua, Teng; Henry, Travis S.; Elicker, Brett M.; White, Darin; Vittinghoff, Eric; Jones, Kirk D.; Urisman, Anatoly; Aravena León, Carlos Andrés; Johannson, Keri A.
  • Thumbnail Image
    Item
  • Thumbnail Image
    Item
    Use of Mycophenolate Mofetil or Azathioprine for the Management of Chronic Hypersensitivity Pneumonitis
    (2017) Morisset, Julie; Johannson, Kerri A.; Vittinghoff, Eric; Aravena León, Carlos Andrés; Elicker, Brett M.; Jones, Kirk D.; Fell, Charlene D.; Manganas, Helene; Dubé, Bruno-Pierre; Wolters, Paul J.