Vitalograph copd-6 - Perform Test

= Bad blow
Perform Test
2
Demonstrate to test subject.
 v Fully breathe in, hold...
 v Insert and lightly bite
the mouthpiece
 v Then blow as hard
as possible for 6
seconds
1
Insert disposable SafeTway mouthpiece.
4
Press E to show best test.
3
Repeat blow 2 more times.