The nurse is completely exhausted. She had a hard shift and was supported by loyal dogs. And now all three of them decided to rest a little. This is due primarily to the desire for quality treatment, but also the system including.
In the US, there is no such thing as a doctor who is in the Department all day. Physicians patients come into the office once a day, sometimes very briefly, in the rest of the time they need to call. There are hospital doctors on duty, but they are also in the Department is not always come only when necessary.
Nurses always do. And the patients in American hospitals are mostly heavy and require active treatment, the lungs rarely get to the hospital (usually they are dealt with in the emergency room and let go home), or very quickly discharged.