If I read you right, Colleen, you are saying that you check mode-to-mode once a day and at a recent JCAHO inspection, you had no trouble. This would be in spite of the pertinent standard that seems to say that each mode needs to be QC'd at least every 8 hours with at least two different levels every 24 hours. When we had trouble was not at our last inspection but at the one before that 3 1/2 years ago. At that time, we had no QC at all for the open mode. That inspector was the one who pointed out that we were not in compliance. We started doing mode-to-mode, but only once a day like you. The inspector we had last year didn't really go into it, and of course, we didn't specifically ask him if it was OK to do a mode-to-mode just once a day to QC the open mode. But we have an inspection coming up and our Hematology manager decided to play it safe. Now of course, the next inspector will probably not ask about it at all!