I have to admit that when I first saw the Spirit convulsing nurse online and video I thought it was lame. But when I saw it in their asylum setting last year at the store I actually thought it was pretty cool.
I'd skip the medical control box though and just trigger the prop with a step pad or do a PIR circiut.
I'm not sure about the girl in the wheel chair, but it would add to your asylum theme.
These are all Spirit props that you'll find on their site.
I'd thought about doing one section with the asylum theme last year that had a torture chamber feel to it. Search the forum and you'll get some hits on what other people have put together using more generic props that they've built around them with hospital type gear and scrubs. I think it's doable and would be a nice change.