Hello, I need to know what anybody knows about VPI-hardly can find any information on how to treat it. I have a son 15 who plays trumpet in marching band, and hasn't been able to play since 10/10/09 after a big competition. He took a 4 week break, but still is unable to play any high notes. Air really escapes out his nose. Are there excercises? I found out about this from friend, when Drs. had no answers for me, I printed up what I could find and delivered to them;however, there only answer now is to have him switch instruments, or quit altogether, which he does not want to do. Is currently playing in band, but only low notes. If nobody had any information, could you maybe point me in a direction? Thanks.