I had feno and spirometry done by my hospital asthma nurse three weeks ago. It made me very out of breath but I persisted and completed a valid test per the computer. The nurse would not tell me the spirometry results, she just said she had to discuss changing my medications with the consultant and arrange an appointment with him.
They then wrote to me and said my spirometry test results needed checking, without telling me what they were and sent me for a lung function test, which was the same feno test and then breathing into a bigger machine.
The young nurse would not tell me anything about the test, and I could not talk anyway, he just made me breathe in and out, until he half killed me. He was absolutely determined that I was going to reach four litres, whatever the cost.
The cost is that my asthma is now back with a vengeance.
Any idea what the four litres was about, so I can at least know what the point of the whole thing was.