When were the above tests done? They are fabulous..off the charts actually! If it was done recently and then you had tests that are now 45% then there is something very wrong...either you are culturing a nasty bug, have other issues that contributed to this drop, etc...this list goes on. You really should go to a CF center and have those tests redone. Maybe you are growing something that has affected your drop dramatically...what are your last cultures? Either way, I hope that your care gets straightened out. Jenn
PS...I am not doubting you, I am just very concerned for you. That is one heck of a drop from 121% to 45% (if they are looking at your FEV1)especially if over a short period of time. What are the docs doing for you to try to bring those numbers up?