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Todd Bertuzzi underwent knee surgery Tuesday. ((Dave Sandford/Getty Images) )

Todd Bertuzzi had arthoscopic surgery on his knee this week and will be out of the Calgary lineup for about a month, Flames general manager Darryl Sutter said Wednesday.

Sutter made the announcement at the end of a busy NHL trade-deadline day.

"It was better to go in and get it cleaned up and ready to go," Sutter said on the club's official website, adding that Bertuzzi had been having trouble with the knee for a few weeks.

Bertuzzi had surgery to repair cartilage in his knee on Tuesday.

Sutter said other players on the team's injured list will be out of the lineup even longer than Bertuzzi, including Rene Bourque, who's out with a high ankle sprain, and Mark Giordano, who's recovering from shoulder surgery.

Sutter expects Bourque to be out another four or five weeks while Giordano might not be ready to play until May.

Centre Daymond Langkow is listed as day-to-day with a hand injury, and Sutter said he wasn't sure when Langkow would return. He's not on the Flames' current seven-game road trip.