Quite a while, actually. It wasn't even half finished when it arrived here with me nine or so months ago. I was lucky to be able to obtain such high quality medical equipment via a very short-lived partnership I'd formed with another Visitor who happened to work at the hospital as a doctor. And with the help of a willing research subject to help me with the initial testing, I was able to get it up and running several months ago.

[She's clearly very proud of it.]

This is what we'll be using today. It's designed to provide a complete physiological profile of the subject - heart rate, blood pressure, brain activity... anything and everything that can be measured or quantified. I wrote the operating system from the ground up and programmed everything myself. It took a while to get everything working the way I wanted it to, but I've thoroughly validated my last few sets of results and I'm fully confident that it's in proper operating order.