Resumo

OSPINO CASTRO, Adalberto; ROBLES ALGARIN, Carlos  e  DURAN PABON, Alejandro. Health care system of auto-regulation of oxygen by non-invasive monitoring, using fuzzy logic. Prospect. [online]. 2014, vol.12, n.2, pp.57-64. ISSN 1692-8261.  https://doi.org/10.15665/rp.v12i2.289.

This research presents the design of an oxygen auto-regulation control system based on fuzzy logic, which allows delivering an exact quantity of the fraction of inspired oxygen FIO₂ to the patient based on the oxygen saturation levels. For this, it was performed the math modeling of hemoglobin dissociation curve from data obtained by oximetry relating oxygen saturation O₂ and Oxygen pressure PAO₂. Then, a proportional valve for medical applications was modeled; this receives a current signal obtained from the air-oxygen blend. Finally, it was designed a fuzzy controller from the Sugeno type with one input, one output for the valve and eleven fuzzy rules specified from the interview with medical specialists. A feasible type research was done, supported on a field design and a documentary one. Results shown the effectiveness of the fuzzy controller to keep the valve to an exact level of FIO₂ consisting of an air-oxygen blend.

Palavras-chave : Fuzzy logic; Oxygen auto-regulation; Fraction of inspired oxygen; Oxygen saturation; Oxygen pressure.

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