Hello mehgalegs
Well, Donbean had basically said exactly what I would say, and have said, many times.
Sadly, not enough nursing/medical staff do emphasize this kind of thing, and I feel it really lets our patients down.
I honestly make sure that relatives/parents ( depending on where I'm working ) know, that they can call anytime, ask to speak to the nurse looking after their relative. Of course, its not always possible to come to the phone immediately, but certainly they will call back, and if they don't within reasonable time, I advise them to call again. Sorry, but bit of a bug bare of mine, shit communication is not justified in anyway, in my book.
There is no point sitting at home worrying and getting upset, if a phone call can help. That is part of out job, parents/relatives are as important in many many respects, as our patients.
You won't be seen as being pushy at all and if they are not nice to you, point them in my direction, ok ? ( although, they really will be ok )
Main advise is that I'd suggest calling mid morning, 10 -11.30 ish, or mid afternoon, 2pm - 4.30 ish. As the other times of the day are particularly busy, with drugs rounds, ward rounds and giving out food!
Oh, best of luck lovely. He'll be home again before you know it DO please aske if there is anything else worrying you - here or the hospital! Take care now