there are many devices that can be used to mobilize secretion that can do better than the traditional physiotherapy.. such as flutter , PEP, hi PEP,, and much more

there are proven to break down the secretion and making it really thin and easier to discharge

there are much better because there patient dependent, some of these devices can be used with some other postural drainage positions.

exercise is also benificial in these cases ,, specially for children with cf