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WillowJ I am responding to an earlier post but wanted to ask you a follow-up question. Yesterday before I left the hospital they did try to do a breathing test on me (I assume it would measure muscle strength of my lungs?) but I was too weak and dizzy to even attempt it. I was asleep and they woke me up to try the test but my BP was really low at the time. I blew into the machine and it didn't even register!
They said I had to wear this clip on my nose so the breathing only came through my mouth but as soon as they put the clip on, I felt like I couldn't get any air and panicked. The technician was worried I could faint if I attempted the test (although I have never fainted in my life) so he canceled it. My cardio said it was okay and we could always try this test in the future as an outpatient.
I was wondering how you would interpret this as I know you have a lot of knowledge re: lung issues. On all the other tests (ventilation & perfusion scan, arterial blood gas test, etc, of my lungs were clear and numbers were normal.) Thanks in advance for any info.
The clip on the nose is standard for pulmonary function tests (to limit where you breathe, so they can measure everything). The air feels different inside the "phone booth", and with the clip, breathing through plastic tubes, and whatnot, it can be hard to get used to.
I find those tests extremely tiring, and do tend to make me more dizzy; if you were already tired and lightheaded, and you have breathing issues for any reason (dysautonomia, cardiac, lung, whatever) it's no wonder you found them difficult.
I don't actually know whether there's a significance to finding it difficult to mouth breathe. (any possibility they forgot to open the valve?)
A muscle strength test seems to be an unusual test to run, and unless your ME doctor ordered it, it's unlikely unless you had myasthenia gravis -type episode(s) where had significant respiratory distress, or they suspect another muscle weakness like musclular dystrophy, or unless you specifically ask (which you might like to do if your lungs feel weak sometimes).
There are some different strength tests: there is one where you clip your nose, then pant into a tube and partway through they block the air supply for a few seconds and measure how well you can push it in and out with just the air left in your lungs.
Then there are ones where they separate breathing in and out into a different test and block the air for a moment in each test, while you are breathing as hard as you can, one way or the other.
http://www.cincinnatichildrens.org/health/p/pulmonarytest-musclestrength/