Browsing by Author "Victorina Lopez, Maria"

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    Acute bronchodilator responsiveness in subjects with and without airflow obstruction in five Latin American cities: The PLATINO study
    (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2010) Montes de Oca, Maria; Perez Padilla, Rogelio; Talamo, Carlos; Halbert, Ronald J.; Moreno, Dolores; Victorina Lopez, Maria; Muino, Adriana; Jose Roberto, B. Jardim; Valdivia, Gonzalo; Pertuze, Julio; Ana Maria, B. Menezes; PLATINO Team
    Background: Acute bronchodilator responsiveness is an area of discussion in COPD. No information exists regarding this aspect of the disease from an unselected COPD population. We assessed acute bronchodilator responsiveness and factors influencing it in subjects with and without airway obstruction in an epidemiologic sample.
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    Chronic bronchitis phenotype in subjects with and without COPD: The PLATINO study
    (EUROPEAN RESPIRATORY SOC JOURNALS LTD, 2012) Montes de Oca, Maria; Halbert, Ronald J.; Victorina Lopez, Maria; Perez Padilla, Rogelio; Talamo, Carlos; Moreno, Dolores; Muino, Adriana; Jardim, Jose Roberto; Valdivia, Gonzalo; Pertuze, Julio; Menezes, Ana Maria B.
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    Frequency of Self-Reported COPD Exacerbation and Airflow Obstruction in Five Latin American Cities The Proyecto Latinoamericano de Investigacion en Obstruccion Pulmonar (PLATINO) Study
    (ELSEVIER SCIENCE BV, 2009) Montes de Oca, Maria; Talamo, Carlos; Halbert, Ronald J.; Perez Padilla, Rogelio; Victorina Lopez, Maria; Muino, Adriana; Jardim, Jose Roberto B.; Valdivia, Gonzalo; Pertuze, Julio; Moreno, Dolores; Menezes, Ana Maria B.
    Background: Recurrent exacerbations are common in COPD patients. Limited information exists regarding exacerbation frequency in COPD patients from epidemiologic studies. We examined the frequency of self-reported exacerbations and the factors influencing exacerbation frequency among COPD patients in a population-based study conducted in Latin America.
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    Health status perception and airflow obstruction in five Latin American cities: The PLATINO study
    (W B SAUNDERS CO LTD, 2009) Montes de Oca, Maria; Talamo, Carlos; Halbert, Ronald J.; Perez Padilla, Rogelio; Victorina Lopez, Maria; Muino, Adriana; Jardim, Jose Roberto B.; Valdivia, Gonzalo; Pertuze, Julio; Moreno, Dolores; Menezes, Ana Maria B.; PLATINO Team
    Background: COPD is a highly prevalent disease but underdiagnosed, undertreated and possibly under-recognized by patients. Limited information exists regarding patients' perception of COPD severity. We compared patients' general, health status perception, degree of breathlessness and physical activity limitation with the severity of their respiratory condition measured by airway obstruction, in a population-based sample.
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    Spirometry reference values after inhalation of 200 mu g of Salbutamol
    (ELSEVIER ESPANA SLU, 2007) Perez Padilla, Rogelio; Torre Bouscoulet, Luis; Carlos Vazquez Garcia, Juan; Muino, Adriana; Marquez, Maria; Victorina Lopez, Maria; de Oca, Maria Montes; Talamo, Carlos; Valdivia, Gonzalo; Pertuze, Julio; Jardim, Jose; Menezes, Ana Maria B.; Grp PLATINO
    OBJECTIVE: The criteria for disease severity established by the Global Initiative for Chronic Obstructive Lung Disease are based on forced expiratory volume in I second (FEV) expressed as a percentage of the predicted value after application of a bronchodilator. This study aims to determine postbronchodilator spirometry reference values.
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    The chronic bronchitis phenotype in subjects with and without COPD: the PLATINO study
    (EUROPEAN RESPIRATORY SOC JOURNALS LTD, 2012) Montes de Oca, Maria; Halbert, Ronald J.; Victorina Lopez, Maria; Perez Padilla, Rogelio; Talamo, Carlos; Moreno, Dolores; Muino, Adrianna; Jardim, Jose Roberto B.; Valdivia, Gonzalo; Pertuze, Julio; Menezes, Ana Maria B.
    Little information exists regarding the epidemiology of the chronic bronchitis phenotype in unselected chronic obstructive pulmonary disease (COPD) populations. We examined the prevalence of the chronic bronchitis phenotype in COPD and non-COPD subjects from the PLATINO study, and investigated how it is associated with important outcomes.
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    The long-term stability of portable spirometers used in a multinational study of the prevalence of chronic obstructive pulmonary disease
    (DAEDALUS ENTERPRISES INC, 2006) Perez Padilla, Rogelio; Vazquez Garcia, Juan Carlos; Nelly Marquez, Maria; Roberto B Jardim, Jose; Pertuze, Julio; Lisboa, Carmen; Muino, Adriana; Victorina Lopez, Maria; Talamo, Carlos; Montes de Oca, Maria; Valdivia, Gonzalo; Maria B Menezes, Ana; PLATINO Team
    BACKGROUND: We report the performance of an ultrasound-based portable spirometer (EasyOne) used in a population-based survey of the prevalence of chronic obstructive pulmonary disease, conducted in 5 Latin American cities: Sao Paulo, Brazil; Mexico City, Mexico; Montevideo, Uruguay; Santiago, Chile; and Caracas, Venezuela (the Latin American COPD Prevalence Study [PLATINO]). METHODS: During the survey period (which ranged from 3 months to 6 months in the various locations) we collected daily calibration data from the 70 EasyOne spirometers used in the 5 survey cities. The calibrations were conducted with a 3-L syringe, and the calibration data were stored in the spirometer's database. RESULTS: Ninety-seven percent of the calibration volumes were within +/- 64 mL (2.1%) of the 3-L calibration signal. Excluding data from the first city studied (Sao Paulo), where one calibration syringe had to be replaced, 98% of the calibration checks were within +/- 50 mL (1.7%). The measured volume was affected only minimally by the syringe's peak flow or emptying time. CONCLUSION: In these 70 EasyOne spirometers neither calibration nor linearity changed during the study. Such calibration stability is a valuable feature in spirometry surveys and in the clinical setting.