Calculate arterial blood oxygen content (CaO2) to assess oxygen delivery. This essential medical tool helps evaluate tissue oxygenation based on hemoglobin, SaO2, and PaO2 for clinical and educational purposes. Quickly determine oxygen content for critical medical insights.
Formula:
The Arterial Blood Oxygen Content (CaO2) is a crucial parameter indicating the total amount of oxygen carried in arterial blood, primarily by hemoglobin and a small portion dissolved in plasma. It's calculated using the following formula:
CaO2 = (Hb × 1.34 × (SaO2 / 100)) + (PaO2 × 0.003)
- CaO2: Arterial Oxygen Content (mL O2/dL)
- Hb: Hemoglobin concentration (grams per deciliter, g/dL)
- 1.34: The Hüfner constant, representing the maximum amount of oxygen (in mL) that can bind to one gram of hemoglobin (mL O2/g Hb)
- SaO2: Arterial Oxygen Saturation (percentage, %) – this is converted to a decimal by dividing by 100 for the calculation.
- PaO2: Partial Pressure of Oxygen in Arterial Blood (millimeters of mercury, mmHg)
- 0.003: Solubility coefficient of oxygen in plasma (mL O2/dL/mmHg)