Have you taken a look at some of the other threads that are similar to yours? Your question comes up fairly regularly with each batch of new nurses. There are several really good responses, maybe even one or two from yours truly

... There's a search feature on the upper right side of your screen. If you put some key words like PICU and new nurse in there, the site will point you to the threads. If you still need more info after that, come on back!