Swallow therapy would be more effective than a swallow test for confirming ability to swallow. I found this thread in my travels, and it's very interesting just for the science alone. You never know when being aware of info like that may help you out one day:
http://www.freerepublic.com/focus/f-news/1358619/posts
I think you have the right idea to just make sure about everything before something happens that can't be undone. :o)
Terri swallows saliva all day, every day.