The objective of this study is to compare the accuracy and correlation of the capnodynamic method for measuring mixed venous oxygen saturation (SvO2) with the standard reference method (pulmonary artery catheter), with the potential for the capnodynamic method to replace the traditional method in selected cases.
Age > 18 years
Not participating in any other interventional study at the time of the study.
Patients under controlled mechanical ventilation in passive conditions.
Situations where the responsible physician deems that, for the benefit of clinical management and therapeutic decision-making, the patient would benefit from the placement of a pulmonary artery catheter (Swan-Ganz) and/or monitoring of central or mixed venous saturation.
Failure to obtain informed consent.
No need for invasive mechanical ventilation.