My oldest has had numerous multi-day hospital stays and I have stayed with him overnight every single night he was hospitalized as well as the parts of the days that I didn't have to work from the office. I know what you mean about the constant interruptions from doctors, nurses, and other staff. Learn as much as you can about the IV and other equipments to which he is connected so that you can operate it as necessary (i.e., reconnect a probe, turn off an alarm), which will cut down on the number of interruptions. It may be tricky with insurance, but if you can try to mkae sure that your DS doesn't have to share his room. Bring him his electronics (laptop, MP3, Kindle, etc.), any old stuffed toys and his own comfortable clothes so it feels more like home. I was surpprised but the hospital staff actually encouraged the kids to wear their own clothes because it actually makes them feel better. Bring potpourri or other scents to mask some of that unpleasant hospital odor.