Article here. http://ds.qj.net/Atlus-reveals-Trauma-Center-Under-the-Knife-2-initial-game-details/pg/49/aid/117490 I found the first one to be quite enjoyable.
There's a trailer out for it now. http://www.computerandvideogames.com/player.php?mode=article&id=1541 There's gameplay ones on Youtube.