Mixed Venous Oxygen Saturation (SvO2) Interpretation

Interpret mixed venous oxygen saturation (SvO2) from pulmonary artery blood. Normal SvO2: 65-75%. Values below 65-70% indicate increased oxygen extraction (high demand or low cardiac output in heart failure, hypovolemic or cardiogenic shock). Values above 80% suggest sepsis (maldistribution), hepatic failure, or pulmonary shunting.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Interpret mixed venous oxygen saturation (SvO2) from pulmonary artery blood. Normal SvO2: 65-75%. Values below 65-70% indicate increased oxygen extraction (high demand or low cardiac output in heart failure, hypovolemic or cardiogenic shock). Values above 80% suggest sepsis (maldistribution), hepatic failure, or pulmonary shunting

Each component has a specific meaning:

  • Pulmonary artery blood — The pulmonary artery blood recorded for the scenario being assessed.

Note: Interpret the svo2 interpretation result against the thresholds and context described above.

How to Use

Enter the pulmonary artery blood for the scenario you are assessing. Interpret mixed venous oxygen saturation (SvO2) from pulmonary artery blood. Normal SvO2: 65-75%. Values below 65-70% indicate increased oxygen extraction (high demand or low cardiac output in heart failure, hypovolemic or cardiogenic shock). Values above 80% suggest sepsis (maldistribution), hepatic failure, or pulmonary shunting. Use the svo2 interpretation result to inform your calculation.

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Frequently Asked Questions