Diseño de un sistema médico asistencial de autorregulación de oxígeno por monitoreo no invasivo, basado en lógica difusa

Abstract

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.