A COPD patient wants to travel via air. How can we assess his condition before the travel?
First, We assess his Oxygen Saturation at Sea level.
Normal air has 21% Oxygen. This means that the lowest FiO2 we can use during the test is 21% (or 0.21). How can we perform the test at FiO2 of 15%?
Are there special low oxygen chambers where the test can be done?
The cut-offs for the test are given at sea levels. How can we do it in our hospital settings as we are at a height about 500 meters above sea level?