Validation and Feasibility of Noninvasive Oxygen Delivery Index Monitoring in Cardiac Surgery Patients

Validation and Feasibility of Noninvasive Oxygen Delivery Index Monitoring in Cardiac Surgery Patients

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