Ask the doctors how familiar with CYCLIC VOMITING SYNDROME or CVS they are if not find someone who is.
I know at 17 she maybe dosnt like the idea but may be good a temporary G-tube...
before allowing your doctor to do anything else to your daughter seek another doctor.
how can he perform any treatments without knowing what he wants to accomplish?
Found this online, hope it helps, other than that, try seeking a different doctor in a larger city maybe?
http://forums.wrongdiagnosis.com/showthread.php?t=6455
My sisters 5 yr old daughter is going through the same very thing.She throws up at least 20-25 times per day.Shes been ruled out for GERD,has had a Upper.GI test,and a CT Scan of her brain. The thing is,shes not losing ANY weight from it...My sister is wating for the results from the CT Scan,and maybe that will give her some answers...
I wish you the best of luck on finding whats wrong with your daughter....