CHS - I'm with Smitty. I'm not sure what you want us to say/do.
I'll either call the foul or not. I'll clear the floor and send the players to their benches. I'll let the team and game mgt attend to the player. If they think EMS or an ambulance is needed, their call. If I think the player was unconscious I will inform coach of the rule. Clear the player off the floor by whatever means the team/medical feel is required. Secure a replacement player and get the game moving.
I am not taking charge of any medical situation nor giving advice. I do not play a doctor on tv and I did not sleep at a Holiday Inn Express last night!