This study aimed to assess how deep hypothermia affects oxygen extraction (OE) and oxygen consumption (VO) in patients undergoing a specific heart surgery at different temperatures (normothermic, 30°C, 25°C, and 18°C).
Over 3 months, 24 patients' hemodynamic and blood gas data were collected, revealing significant decreases in VO (from 65.9 to 25.1 mL O/min/m) and OE (from 18% to 9%) as temperature dropped to 18°C.
The results indicate that metabolic needs are primarily met by dissolved oxygen during the cooling phase, highlighting the importance of increasing arterial oxygen pressure to prevent hypoxia in patients undergoing deep hyp