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Issue:Generalized net model of the mechanical ventilation process

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http://ifigenia.org/wiki/issue:iwgn-2001-34-39
Title of paper: Generalized net model of the mechanical ventilation process
Author(s):
Ludmila Todorova
Central Laboratory of Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 105, 1113 Sofia, Bulgaria
lpt@bgcict.acad.bg    (current: lpt@clbme.acad.bg)
Joseph Sorsich
Central Laboratory of Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 105, 1113 Sofia, Bulgaria
Presented at: Second International Workshop on Generalized Nets, Sofia, 26-27 July 2001
Published in: Conference proceedings, pages 34—39
Download:  PDF (146  Kb, Info)
Abstract: Weaning from mechanical ventilation is a serious problem to be resolved in ACU. Taking the decision at which moment to begin the process of weaning from mechanical ventilation depends on many factors like the general status of the patient, the knowledge and the approach of the medical team. Evaluation of the status of the patient is based on monitoring of a number of variables (indices). These are classified into three categories:
  • blood indices;
  • pulmonary indices;
  • body temperature.

In this paper a model is proposed whereby each group of indices contributes to the decision to change the ventilator regime, to begin weaning from mechanical ventilation, or to stop the weaning trials. This model does not include factors such as consciousness, disturbance in the psychological status, cough reflex, acceptance and stopping of sedative and narcotic substances. The model also does not take into account the concentrations of because of their negligible effect on the patients’ condition.


References:
  1. Atanassov, K. Introduction into the Theory of Generalized Nets. Burgas University Press, Burgas, 1992. [In Bulgarian]
  2. Atanassov K., Generalized Nets. World Scientific, Singapore, 1991.
  3. Brochard L., A. Rauss, S. Benito, G. Conti, J. Mancebo, N. Rekik, A. Gasparetto, F. Lemaire. Comparison of three methods of gradual withdrawal from ventilator support during weaning from mechanical ventilation. Am J Respir Crit Care Med, 150: 896-903, 1994.
  4. Fagon JY, J. Chastre, A. Novara, P. Medioni, C. Gibert. Respective influences of initial severity of illness and of mechanical ventilation in the development of ICU acquired pneumonia (abstract). Am Rev Respir Dis, 143: A493, 1991.
  5. Stantchev S. and Alexov, S. Correction of Breathing Disorders. Sofia, Dräger, 1999.
  6. Petros, A., C. T. Lamond, and D. Bennett. The Bicore pulmonary monitor. Anaesthesia, 48: 985-988, 1993.
  7. Burns S., J. Burns, and J. Truwit. Comparison of five clinical weaning indices. American journal of critical care, 3:343-352, 1994.
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