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.
The study will be conducted in the ICU of the Hospital Universitario de la Princesa. The study population will include all patients with medical conditions (respiratory or cardiac) who could benefit from the placement of a PAC and/or the monitoring of mixed venous saturation for clinical management and decision-making, or monitoring of central venous saturation if a pulmonary artery catheter is not required.
Case-only
Prospective
Not listed
Mixed venous oxygen saturation (SvO2)
measured using the capnodynamic method in comparison with the invasive standard method using co-oximetry with a pulmonary artery catheter (PAC).
Cardiac output
measured using the capnodynamic method in comparison with the invasive standard method using co-oximetry with a pulmonary artery catheter (PAC).
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