From: Control of the expiratory flow in a lung model and in healthy volunteers with an adjustable flow regulator: a combined bench and randomized crossover study
Setting
Comfortable
[n]
Slightly uncomfortable [n]
Moderately uncomfortable [n]
Very
uncomfortable [n]
Intolerable
n]
Baseline
12
16
2
0
Medium flow regulation
11
1
Strong flow regulation
10
9