Berglund and Lehtera sustained upper-body injuries Thursday in a 5-4 shootout win against the Nashville Predators.
The Blues recalled forward Ty Rattie from the Chicago Wolves of the American Hockey League. Rattie, who has 17 goals and 28 points for the Wolves, played in the AHL All-Star Game. He played in two games for St. Louis last season.
The Blues, who have points in nine straight games (8-0-1), overcame a two-goal deficit against the Predators. Eleven players each recorded one point.
The Hurricanes will try to continue their best month of the season. Carolina's 0-6-2 start to the season is a distant memory now, as the Hurricanes have put together a 7-2-1 record in January.
"The thing that hasn't deviated is their work ethic," coach Bill Peters said. "It was good early when we didn't get the results, but it's continued to be good."