The effect on Edge was instantaneous. His shoulders were the first thing to relax, then his back and arms. A calm, peaceful look smoothed over his features, and he gave a little smile at the sound. Obviously, this was definitely the way to deal with Edge's White Coat Syndrome. He remained pressed there against Donnie with his eyes closed, breathing starting to even out. Eden chuckled a bit, then put his hand on Donovan's knee, explaining.
"Edge has always had a bad case of White Coat Syndrome. Not... entirely sure where it came from, even. From before his cardiophilia, surely. Seems like you've got a handle on it, though... I've never seen him calm down so quickly." He backed up a bit when Donnie stood up, and nodded a bit.
The way Edge was pressed against Donovan's side showed that... he wasn't quite over his fear yet. Even if he had calmed down a considerable bit, he still didn't let go of the boy, or make a move to sit back on the couch, until Donnie had fully stood up. He swallowed, and looked down a bit. "Y-you go first." he murmured.
Eden was already off on the other side of the room, getting a clipboard from a drawer, as well as a couple of blank sheets of paper from the fax machine, and one of those smooth-write pens that was supposed to write even underwater and upside-down. Considering there was a drug name on it, it had probably been a promotional thing... or Edge had stolen it. Whatever the case, Eden tucked it into his pocket, and wheeled back to the others, with the clipboard and paper on his lap. He also paused to snag a small box from a shelf underneath the kitchen counter, pulling it onto his lap as well - before setting it on the coffee-table once he got back to them.
"If you're going first, Donnie, I need you to take those sensors off your chest. You can put a shirt on if you like. I'm not going to be taking blood, because I don't have the equipment here, but I'd like to do blood-pressure, so if you do put on a shirt, roll up your sleeve a bit."