Template:Blood gas, acid-base, & gas exchange terms
| PaO2 | Arterial oxygen tension, or partial pressure |
|---|---|
| PAO2 | Alveolar oxygen tension, or partial pressure |
| PaCO2 | Arterial carbon dioxide tension, or partial pressure |
| PACO2 | Alveolar carbon dioxide tension, or partial pressure |
| PvO2 | Oxygen tension of mixed venous blood |
| P(A-a)O2 | Alveolar-arterial oxygen tension difference. The term formerly used (A-a DO2) is discouraged. |
| P(a/A)O2 | Alveolar-arterial tension ratio; PaO2:PAO2 The term oxygen exchange index describes this ratio. |
| C(a-v)O2 | Arteriovenous oxygen content difference |
| SaO2 | Oxygen saturation of the hemoglobin of arterial blood |
| SpO2 | Oxygen saturation as measured by pulse oximetry |
| CaO2 | Oxygen content of arterial blood |
| pH | Symbol relating the hydrogen ion concentration or activity of a solution to that of a standard solution; approximately equal to the negative logarithm of the hydrogen ion concentration. pH is an indicator of the relative acidity or alkalinity of a solution |
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