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Relation between Oxygen Saturation and Partial Pressure
The relation between oxygen saturation (SpO
pressure (PaO
2
the oxygen saturation as measured by pulse oximeters.
Oxygen Saturation vs. Oxygen Partial Pressure
%
100
90
85
80
70
60
50
40
30
20
10
0
The curve of the above graph may shift to the right or left according
to the pH of the blood or the body temperature. (Shift to right: acidosis,
high body temperature; shift to left: alkalosis, low body temperature)
, torr or mmHg) is shown in the graph below. SpO
10
20
30
40
Oxygen Partial Pressure
, %) and oxygen partial
2
Adult hemoglobin
pH=7.4
37 C
50
60
70
80
PaO
2
2
90
100
110
Torr
(mmHg)
is
21
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