Validation of the capnodynamic method to calculate mixed venous oxygen saturation in postoperative cardiac patients.

ABSTRACT:

Background

Cardiac output and mixed venous oxygen saturation are key variables in monitoring adequate oxygen delivery and have typically been measured using pulmonary artery catheterisation. The capnodynamic method measures effective pulmonary blood flow utilising carbon dioxide kinetics in ventilated patients. Combined with breath-by-breath measurements of carbon dioxide elimination, a non-invasive approximation of mixed venous oxygen saturation can be calculated.

Methods

This study primarily investigated the agreement between mixed venous oxygen saturation calculated using the capnodynamic method and blood gas analysis of mixed venous blood sampled via a pulmonary artery catheter in 47 haemodynamically stable postoperative cardiac patients. Both measurements were synchroni

SUBMITTER: Wallin M 

PROVIDER: S-EPMC11889286 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature