"Beckoning Coach" for an injured player

[imagomer]

Anyone here ever T'd up a coach for coming onto the court for an injury, unbeckoned? How do you beckon, generally? I coach HS Girls - had an injured player and I waited to be beckoned, but was not (as far as I could tell). When officials removed themselves from the immediate are of the injured player, I interpreted their departure as an invitation to attend to my player, so I did. After the game, in a reasonable conversation, I asked them if/how they beckoned, and the official who was closer to the injury said he had shouted "she's choking!" and he figured that was enough. (I didn't hear him, though I was watching him for a signal to come onto the court) I can't think of a reasonable instance where I would really get T'd for going onto the court for a real injury, provided I hadn't already misbehaved badly - but this got me to thinking - how do you guys usually communicate to the coach that he is invited to attend to the player?