Welp...
In the US it really isn't different. You either have to be too psychotic to know the difference between orange and a kitten, or ACTIVELY suicidal. Like...if I don't get admitted, I'm eating the barrel of my gun. Brink means you have wiggle room for your mood to flip to harmlessly depressed.
My friend's son told her he want to kill himself after "he harmed others". Took him to ER. Kept him 23 hours then discharged him with the instructions, "To watch him." The teen's first therapy appointment is 4 weeks from now.
Mental health care is an utter joke unless your family has really deep pockets.