Why the study?
The study was conducted to assess the association between mixed venous oxygen saturation and cardiac index in cardiac surgical patients during the initial 4 hours in the ICU.
Population
4,958 adult cardiac surgical patients operated on during 2007 to 2020
Comparison
SvO2 vs cardiac index measurements
Design
Single-center retrospective observational study
Follow-up
4 hours
Authors
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SvO2 should not surrogate CI changes early after cardiac surgery; this Level 3 cohort leaves open optimal monitoring strategies.
Mixed venous oxygen saturation has a poor association with cardiac index during the early ICU recovery phase after cardiac surgery, indicating they should not be relied upon as reliable predictors of one another.
Holm et al. (2025) studied this question.