The test I was referring to that showed the big change after they put on Mestinon in hosp after a few hours of machines monitoring and this test was NIF or negative inspiratory force test. This particular test is done by a respiratory therapy person at bedside. It is a small handheld unit that is less accurate. There is another test with this at bedside but this one showed this big change. For me the one where I have to suck air in is the hardest/kinda scary as nothing happens. My muscles cant at this point push against the 'wall' in the tube that is created. When I get new people they at times reexplain the test even more than once thinking I dont get what I am supposed to be doing. Unfortunately the bedside test can be subjectively hurt in this way as on the their form they put down their thoughts on whether you gave your best effort. Out of several people people over 2 days I only had one that said they werent sure about my effort.

Here is a piece on the more accurate pulm testing if you care to look:
http://emedicine.medscape.com/article/303239-overview
This article uses the term Restrictive lung disease. I was diagnosed with when I saw my first pulmo in 2005.

Annie59