Interpreting results of hypoxia altitude simulation testing*
Interpreting results of hypoxia altitude simulation testing*
PaO2 (mmHg)
PaO2 (kPa)
SpO2
Recommendation
>55 mmHg
>7.4 kPa
>88 percent
In-flight oxygen not advised
50-55 mmHg
6.6-7.4 kPa
84-88 percent
Borderline, a walk test may be helpful
<50 mmHg
<6.6 kPa
<84 percent
In-flight oxygen advised
Hypoxia_altitude_test.htm
PaO2: arterial partial pressure of oxygen; SpO2: oxygen saturation by pulse oximetry. * Hypoxia altitude simulation testing involves breathing a gas mixture of nitrogen with oxygen at 15.1 percent for 20 minutes, as tolerated.