Couturier had to be helped off the ice at the team's practice on Tuesday after a collision with teammate Radko Gudas, who was moving backward and didn't see Couturier.
After tumbling to the ice, Couturier threw his stick against the boards in anger. He was assisted off the ice.
The Flyers trail the Penguins 2-1 in their best-of-seven first-round series. Couturier leads the team in postseason scoring with a goal and two assists.