Out of mana / Low Health shortcut

I can't find any post about this issue yet. I hope riot can add a shortcut so we can alert our teammates when we are out of mana or low health. Maybe add an emoticon for the emoticon wheel that says "OOM" or "NO HP" that is only visible to your own teammates, or add it in the ping wheel. Instead of clicking on your health/mana bar. This is very helpful to alert your teammates before ganks, team fights and prevent losing fights.