Thanks all. We have been going by what our HillRom representative told us, which seems to be similar or maybe a little bit higher frequency than others here. Well talk to Derek's doctor during our next clinic.
FYI, We let Derek watch TV during vest sessions such as wiggles, bob the builder, winged migration, muppets and he almost never has a problem with wearing the vest or treatments.
Thanks again.
Barry, Jill and Derek