Validation of Mixed Venous Blood Oxygen Saturation Obtained With a Novel Mathematical Equation

Validation of Mixed Venous Blood Oxygen Saturation Obtained With a Novel Mathematical Equation Using Arterial Oxygen Saturation and Various Local Tissue Oxygen Saturations.

The purpose of this study is to test a new way to measure the oxygen level in the mixed venous blood system (the system that carries blood collected from all over the body to the heart), which is a very important monitoring tool for the overall oxygen delivery to all our tissues. This new way measures the oxygen level in the mixed venous blood from outside the body, instead of measuring from the inside through a catheter (a thin, flexible plastic tube) that is placed by breaking the skin.

Study terminated because of inability to recruit subjects

Inclusion Criteria:

• Patients already being monitored by a pulmonary artery catheter and an arterial line

Exclusion Criteria:

• Patients with severe heart failure
• Patients with carbon monoxide or thiocyanate poisoning