Examinando por Autor "Chaparro-Preciado, J. A. (Javier Alberto)"

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    PublicaciónAcceso abierto
    Análisis y clasificación del patrón respiratorio de pacientes en proceso de retirada del ventilador mecánico
    (2014-04-30) Chaparro-Preciado, J. A. (Javier Alberto); Giraldo-Giraldo, B. (Beatriz )
    Estimating the optimal time to remove the ventilatory support from a patient in intensive care remains essential in clinical practice. In this work we study the breathing pattern from the respiratory flow signal in the process of weaning considering the following stages: characterization of the signal from the identification of respiratory cycles, respiratory pattern analysis from mathematical modeling of the resulting series, and classification in order to identify patterns of patients with possible success in the process. We analyzed 153 patients classified into three groups: success, failure and reintubated, according to results of T-tube test. The time series for breathing duration, inspiratory time, expiratory time, and shallow breathing index that resulted in significant differences in the mean, model order, first coefficient and final error of prediction were selected. With them we obtained a classification accuracy of 86% (sensitivity 0.84 - specificity 0.86) using a linear classifier discriminate type. Other classifications were analyzed, such as logistic regression and support vector machines.
  • Miniatura
    PublicaciónAcceso abierto
    La ingeniería biomédica en Colombia: una perspectiva desde la formación del pregrado
    (2014-04-24) Ríos-Rincón, A. M. (Adriana María); Cruz, A. M. (Antonio Miguel); Rodríguez-Cheu, L. E. (Luis Eduardo); Chaparro-Preciado, J. A. (Javier Alberto)
    This academic paper presents the state of Colombia`s undergraduate education in Biomedical Engineering. Programs of the European Union and of the United States were reviewed. In the national level, fifteen programs of different higher education institutions were reviewed under the category of Biomedical Engineering and Bioengineering, based on three information sources: University official Website, Information System on higher education and work observatory of the National Education Ministry. It was found that the total offer of national undergraduate programs in Biomedical Engineering and Bioengineering in Bogota D.C represents the 30% of the total offer in the country, Antioquia (Medellín) represents the 27%, Valle del Cauca (Cali) the 13% and the other departments represent the 30% left. The undergraduate programs in Biomedical Engineering show similar standards regarding length, and professional developing competences with slight differences in the graduation profiles and the emphasis. In the present, there are at least 528 graduated Biomedical Engineering and bioengineers in the country (0,27% of all engineering graduates). The rate of graduates per year, between 2001 and 2007, is close to 75 biomedical Engineers and bioengineers. It can be concluded, that despite the offer of active programs in the national level, the rate of graduates is low in relation to: the Colombian population which is growing, the growth of the number of people with disabilities and elders, and the number of graduates from other engineering fields. A reflection is proposed, regarding the challenges that worldwide scientific and technological advances present, which in some measure become formation directives.