But NSW Blues captain Boyd Cordner was confident he was getting the best treatment and advice.

Cordner came from the field in just the 19^th minute for a head injury assessment, sparking concerns his State of Origin series might be over in game one at Adelaide Oval on Wednesday night.

He copped Felise Kaufusi's hip to his head while attempting to tackle the Maroons second-rower.

But he returned to the field after passing his HIA and completed the game in Queensland's upset 18-14 victory.

Cordner has a history of struggling with concussion, with the Sydney Roosters taking a very cautious approach with his return to playing this year.

He only played 13 NRL games this season and had three head knocks during the Roosters' campaign.

The 28-year-old will now have to pass the concussion protocols over the next six days to be able to play in Origin II at ANZ Stadium on Wednesday.

"It's not ideal to keep getting head knocks. I understand that, but I've got the best people around me," Cordner said.

"I've sought the best advice during the year and I'll keep doing that. I'll work closely with the medical staff through the week.

"I've got some tests to pass through the week. We'll just go from there."

Blues coach Brad Fittler was confident in the concussion protocols and didn't think there was any need for him to step in to keep Cordner on the sideline for the rest of Origin I.

He left those decisions to the medical experts.

"I'm the coach. There's protocols and we'll follow the protocols," Fittler said.

The player who came on to replace Cordner while he was off being assessed, Cameron Murray, will also be examined during the week.

Murray limped off just a few minutes after he came on for his captain.

Fittler was unsure exactly what the problem was, but thought it was either his hamstring or hip.