Konica Minolta PULSOX-300i RelationbetweenOxygenSaturationandPartialPressure, Appendix, ¢Oxygen Saturation vs. Oxygen Partial Pressure

RelationbetweenOxygenSaturationandPartialPressure

The relation between oxygen saturation (SpO2) and oxygen partial pressure (PaO2) is shown in the graph below. SpO2 is the oxygen saturation as measured by pulse oximeters.

¢Oxygen Saturation vs. Oxygen Partial Pressure

%

100

90

85

80

70

60

50

40

SpO2 30

20

10

								pH=7.4
								37°C
0	10	20	30	40	50	60	70	80	90	100	110
							PaO2				Torr
											(mmHg)

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

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Appendix