University of Minnesota
This study will establish the feasibility and preliminary validity of real-time oxygen delivery index (DO₂i) monitoring using noninvasive hemoglobin (SpHb, Masimo) and minimally invasive cardiac output (FloTrac, Edwards) in cardiac surgery patients.
Inclusion Criteria: * Adults ≥ 18 years undergoing cardiac surgery * Placement of pulmonary artery catheter with continuous cardiac output (CCO) as part of routine clinical care * Placement of arterial line with FloTrac as part of routine clinical care * Availability of ≥ 3 arterial blood gas samples at specified timepoints Exclusion Criteria: * Mechanical circulatory support planned or in use (IABP, Impella, ECMO) * Patients without BOTH pulmonary artery catheter with CCO and arterial line with FloTrac * Patients who are Research Opt-Out
The SpHb monitor is an FDA approved device being used according to its approved indications. No additional invasive procedures, blood draws, or interventions are performed for research purposes.
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