Introduction:

The evolution of a dynamic system can be characterized from the construction of chaotic attractors.

Objective:

To develop a methodology based on dynamic systems, for the evaluation of venous oxygen saturation of patients in the Intensive Care Unit.

Methodology:

10 patients with different pathologies of the Post-surgical Intensive Care Unit were selected, and recorded venous oxygen saturation during their time of stay. Based on these values, chaotic attractors were constructed on the delay map and the minimum and maximum values occupied by the attractor were evaluated.

Results:

It was found that venous oxygen saturation has a chaotic behavior; the maximum and minimum values of the attractors on 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.

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