Acapella device
What is the difference between blue and green?
Hey John in Tenn,
The green one is for COPD sufferers who have a better expiratory reading. The blue is for the sufferers who have a lesser expiratory reading. These readings would come from a PFT test. The green one I guess is for stage 2 and stage 1 sufferers, and the blue one is for stage 3 and 4 sufferers. Your doctor would be able to tell you which to get or supply you with one. Hope this helps. Take care and God Bless!
