- Sampling of Mixed Venous O2: - Shows changes in Arterial
oxygenation as the
Cardiac Output changes; - Allows calculation of AVo diff and
Shunt: (for Respiratory Failure); - PVo2 < 30 mm Hg, prognosis is poor;
- Discussion: - normally the Svo2 is about 68 to 77%, w/ a PaO2 to 40 mm Hg; - if Vo2 is constant, reductions in Svo2 values should reflect increases in oxygen demand or decreases in
Cardiac Output or arterial O2 content; - decrease in Svo2 of > 10%, or a fall in Svo2 to less than 60% usually indicates inadequate oxygen delivery to the tissues; - Svo2 less than 50% is often associatted with hypotension; ------------------------
Relationship between oxygen consumption and oxygen delivery during anesthesia in high-risk surgical patients.
Hemodynamic and oxygen transport responses in survivors and nonsurvivors of high-risk surgery.
Oxygen consumption and resting metabolic rate in sepsis, sepsis syndrome, and septic shock.
Incommensurate oxygen consumption in response to maximal oxygen availability predicts postinjury multiple organ failure.
