In order to be able to support children through conversation it is important to choose the right expression so that children understand what is going on and not experience fear; otherwise the NRMP becomes more difficult to perform. The nurses’ level of experiences, as well as the age and experience of the children are helpful when choosing words and phrases that fit the moment. One way to conceptualize this is to make use of helpful metaphors, as parents and even children do, and are described by an nurse like this: A child says while the patch is removed ‘it's as slow as a snail when it goes’. Another example of how nurses use metaphors: I think it's like a small aircraft … You can refuel … You can say ‘the airplane has crashed’ [if the intravenous cannula insertion fails] … It has worked well for what I call ‘a pvk’ [cannula] which doesn't mean anything to them.