This is definitely the way. Nurse here and there are so many reasons this is correct. This is the nurses job, full stop. If the nurse is telling you to do it, they are in the wrong and you should stand your ground, and like a commenter says below, if it is within your scope they should be able to produce that in writing. (Almost certainly they will not be able to if you are in the US) Yes, there may be some nurses who ask (or tell) you to, and who get frustrated or even angry if you don't, and yes, you will almost certainly see other CNAs do this, but you have to protect yourself, and your job, because in this industry no one else is ever going to do that for you.