MCammond was still unable to play because of the concussion sustained when Anaheim's Chris Pronger elbowed him in the head four days earlier.
McAmmond wanted to play in the Senators' 3-2 home loss to the Ducks on Monday night but was held out in a game-time decision by coach Bryan Murray. His status was again questionable on Wednesday, and he was on the ice for the pregame skate but was then scratched from the lineup.
Pronger served a one-game suspension for the hit that occurred early in the third period of Ottawa's 5-3 victory Saturday in Game 3 -- the only game in the series won by the Senators, who tried to avoid elimination Wednesday.
McAmmond lost consciousness on the ice and was woozy when he was helped to the dressing room after the hit. He didn't return to the game.
Chris Kunitz did get back in the Anaheim lineup after the Ducks' top-line forward sat out Monday night with an abdominal injury. He had missed seven games with a broken hand and didn't finish his first game back Saturday because of the latest ailment that was caused by an on-ice collision.
Kunitz was in the starting lineup, alongside forwards Teemu Selanne and Andy McDonald.