Oh, damn, poor gradma! :P But at least they figured it out on time, didn't they, and in hospitals they tend to make people better not worse, regardless of how scary they are.:) Sending a big hot balloon of good wishes to grandma!
I can completely understand that you are irked by being "baby-sitted", but if you can't really do anything about it - perhaps you only need to change your attitude and make something nice of it. Smile instead of frown and maybe make it a bonding night. Or a card-playing night. Or a truth or dare... or maybe not, don't listen to me, my ideas tend to go from bad to worse. ;)
In any event, big fat hugs to pull through this fast and with grace! :)