3. Old stuff
          3.2. Old physio stuff (around 2005)
              3.2.4. Clinical measurement
                  3.2.4.2. Measurements
                      3.2.4.2.3. Gas analysis
 3.2.4.2.3.2. Oxygen-specific 

ABG machines

Most ABG machines measures oxygen partial pressure (pO2)

From this measured pO2
--> SatO2 can be estimated oxygen dissociation curve
--> O2 content can be calculated