Wild forward Jason Pominville also missed Thursday's practice and will not travel to Chicago for Friday's game. He missed Game 1.
Coach Mike Yeo says if Backstrom is unable to go, Josh Harding will get the start on Friday night after he made 35 saves in Minnesota's 2-1 overtime loss in the opener Tuesday night.
Blackhawks centre Dave Bolland and goalie Ray Emery have been ruled out for Game 2 due to lower-body injuries. But Emery skated on Thursday, and coach Joel Quenneville says both players could travel to Minnesota for Game 3 on Sunday.
We want to make sure that whoever makes our team really makes our team by earning it and not putting them in situations where they get preference because of their status as a first-round pick or whatever it might be. That's not going to happen. Everybody has to earn their way on our team.
— Columbus Blue Jackets general manager Jarmo Kekalainen on the team's prospects at development camp