The Flames, who had the opportunity to draw even with the Jets heading into the pivotal matchup, saw a season-long four-game winning streak end with a 4-3 loss to the Chicago Blackhawks on Tuesday.
"We have no choice," Backlund said. "If we want to keep our season alive and we want to keep our playoff hopes alive, we've got to forget about everything to this point and win one game [Wednesday]."
The Jets, who also lead the Nashville Predators by three points for the second wild card, enter with a bit more momentum having outscored opponents 12-3 in consecutive victories against the Detroit Red Wings (6-2) and New Jersey Devils (6-1). A third straight regulation win, and a four-point edge over the Flames remains equally critical for the Jets, who are seeking a postseason berth after missing the playoffs last season.
"[Wednesday]'s a huge game," Jets forward Adam Lowry said. "It's as close to a must win as you'll get in the regular season. It's a huge game. I think we've really been preparing for it."
NHL.com independent correspondent Darrin Bauming contributed to this report