Giants vice president of medical services Ronnie Barnes said the team's medical staff was unsure what happened with Ware and "the video replay provided us with evidence that a concussive event had occurred."
Ross and Ware didn't return to Sunday's NFC wild-card victory over the Atlanta Falcons, but Giants coach Tom Coughlin said Monday he was hopeful both could play in the NFC divisional playoff game against the Green Bay Packers. Coughlin said the players were going through the concussion protocol and the team was treating Ross as though he does have a concussion.
The NFL instituted use of the monitors by a team's medical staff last Friday only to review plays that might have caused an injury. Barnes said "the system worked as it should have."
NFL spokesman Greg Aiello said the Giants were the only team that needed to use the technology during the wild-card games.
The Associated Press contributed to this report.