Nitrogen washout
Nitrogen washout, breathing Oxygen:
- This test involves normal breathing through a mouthpiece with 100% oxygen for a few minutes.
- The amount of nitrogen which is in the air will always be the same as the nitrogen inside your lungs. As you breathe 100% oxygen, the nitrogen is flushed out of your lungs and measured as it is washed out by the oxygen.
- Once nitrogen returns to your previous level the test is over.
- This test measures the total lung capacity, all of the volume of the lungs.
