Osborne was approached by the Otago Daily Times for comment following the public focus on the issue recently.
He was concerned Highlanders prop Josh Hohneck had been allowed to return to the field when he appeared to have been knocked out during the game against the Crusaders in Christchurch on April 11.
''If you read the NZRU [New Zealand Rugby Union] guidelines from last year ... at every level below, they are asking the players, the managers, the coaches, the referees and the parents to watch out for the person who looks concussed and get them off,'' Osborne said.
''It would seem to me to be pretty simple to keep the rules of rugby the same across all levels.
''If there is a question about concussion or a definite concussion, you're off and you stay off.''
Osborne said he had not seen the game or the replays of the collision which knocked Hohneck off his feet.
However, he understood how Highlanders doctor Greg Macleod could have missed what appeared to be an obvious concussion.
''You may not see the injury happen because you are busy looking at the last ruck to make sure all your members got up, or examining an ankle on the sideline or doing whatever you are doing.
''And then when you get out on to the ground, you are looking after the guy and making sure you are doing his airway, breathing and circulation [ABCs] correctly. The last thing you should be doing is looking up at that scoreboard for a replay.
''But at Super 15 level, it is also for the match-day doctor to be keeping an eye on all these sorts of things.
''The match-day doctor has the opportunity to watch the big screen, so between the two doctors they then have to make sure that they are happy that this person has had their ABCs done properly and they both also have to be convinced there is no concussion.''
Referees also had the ability to order a player off if there were concerns, Osborne said.
''The regulations say that the referees are allowed to order the player off if they are worried that they are injured - and this isn't under the concussion rule but under the injury rule. The referee also has the power to prevent an injured player from returning to the game.
''So to return to the game from being knocked out, if that is actually what happened, it means it got past two doctors, a test and the referee. The responsibility is with more than just the team doctor.''
New Zealand Rugby's answer is to make sure the television footage is available to the match-day doctor.
But that ignored the fact that concussion did not have to appear immediately, Osborne said.
''It may take hours or even the next day before the person is aware they are a little bit groggy and they have a lingering headache that they haven't noticed before,'' he said.
Osborne felt the match-day doctor, who was ''technically'' independent, was best placed to carry out the head injury assessment.
However, by cutting out the team doctor, you removed another set of clinical eyes, he said.
Advanced life support paramedic Graham Roper contacted the Otago Daily Times last week because he was concerned New Zealand Rugby was not doing enough to protect its employees.
''Any period of unconsciousness, no matter how brief, you treat it as a potential head injury,'' Roper said.
''What needs to occur then is a stand down. You just can't continue playing the game. End of story.
''They are employing rugby players ... and so I think the question that can be asked is: could they be seen to be breaching the health and safety Act by failing to provide a safe working environment?''