D
Has your Dad tried a suction machine? After my surgery, I had very similar problems to your dad with the PEG and choking on mucous. They sent me a little suction machine that I could vacumn out the mucous. I did have to get up three times a night but eventually it got better. Insurance usually covers it and its very simple, just plugs in, and is a mini version of the one they use in the hospital. It's easy to change the collection chamber. It's is awful but better than using the toilet bowl all the time
Charm