Evaluación de la Saturación Venosa de Oxígeno desde la teoría de los sistemas dinámicos

Abstract

Introduction: The evolution of a dynamic system can be characterized from the construction of chaotic attractors. Objective: to develop a methodology for the evaluation of venous oxygen saturation for patients in the Intensive Care Unit, based on dynamic systems. Methodology: 10 patients with different pathologies of the Post-Surgical Intensive Care Unit were selected, and recorded the venous oxygen saturation during their stay. Based on these values, chaotic attractors were built on the delay map and evaluated for the minimum and maximum values occupied by the attractor. Results: it was found that venous oxygen saturation has a chaotic behavior; the maximum and minimum values of the attractors in the delay map varied between 22.10 mmHg and 93.70 mmHg. Conclusions: a new methodology is proposed capable of characterizing the behavior of this monitored variable for the evaluation of the critical patient.