300s or stubborn highs Like most posters here - I really only check keytones with high numbers that don't come down after a correction bolus. Usually 300s or so - or numbers that just stick. I usually do a correction first - if numbers are not coming down I will check keytones and probably go ahead and change the site. It is all a learning process, but when we first started pumping two years ago at age 2 1/2, I did everything BY the BOOK, exactly as I was instructed. But now that I have learned more, I feel like I know how to treat my child better than pediatricians.