Stoke will seek clarification from the Football Association regarding what constitutes a sending off offence after failing in their bid to overturn defender Robert Huth's recent red card.
The German defender was dismissed at the weekend for a sliding challenge on Sunderland's David Meyler.
The Potters' appeal was rejected and Huth now starts a three-match ban.
"We have to clear up what is a sending-off and what isn't," Stoke manager Tony Pulis explained on Friday.
"We are watching games at times and we are getting different decisions being made for different teams and different players, but similar incidents."
Pulis, who was fined £10,000 and warned about his future conduct by the FA in November for criticising the performance of referee Lee Probert, explained that "inconsistency" of officiating is a problem.
He also revealed that Stoke will be sending the football authorities a video of recent refereeing decisions.
"We are going to put a compilation of incidents together over the next few days," the Welsh manager explained.
"We will do it very professionally, in a proper manner, and then we'll send it off to the FA.
"There is no point being just negative with it - you have to be a little bit constructive with it as well."