A new critical system is on its way that is more involved, chaotic, and engaging to deal with--it's a long-awaited companion for Goonchem.
This new system doesn't apply to all races--station races that do not utilize this new system are Diona, Slime People, and IPC; they will die using the old method of blacking out, slowly accumulating damage, then dying.
Treating people is basically the same as before, with a few nuanced caveats. You apply patches or advanced trauma/burn kits