Svechnikov became tangled with Zdeno Chara, and teammates and medical staff needed to help him off the ice.
Hurricanes head coach Rod Brind'Amour didn't have a postgame update on Svechnikov.
"Certainly didn't look good," Brind'Amour said, according to Chip Alexander of the Raleigh News & Observer.
Svechnikov is a significant piece of Carolina's offense, and he had logged seven points in five postseason games while averaging over 17 minutes per contest entering Saturday's clash.
The second-year sniper notched 24 goals and 37 assists in 68 regular-season games before the pause.
Boston held on to win the game and take a 2-1 series lead.