I have and have played Trauma Center: Under the Knife for the DS, and Trauma Center: Second Opinion for the Wii. I also have Trauma Center: New Blood for the Wii, but I haven't played it, yet. Trauma Center: Under the Knife 2, for the DS, was never released in Europe, though, but I'll buy it on eBay or such, soon... Trauma Team, for the Wii, was never released, either, but I'll be getting it... and then, due to the region coding, I'll have to start using emulators that Nintendo are so outrageously against that paying people use for their bought games - apparently it's better that they never are played, at all.
The games are so difficult that they have managed to make me suicidal, though. Even still, I like them a lot... especially since they have an anime theme. That makes almost any game better.