Every hospitalization for the tweedles was on an emergency basis because of the lack of psychiatric beds for children.
psychiatrist & therapist's were always aware that hospitalizations were near - however there was no way they could or would be admitted unless in a crisis state.
Having said that, you'd have to check in with your psychiatrist. Determine the criteria for an admit for stabilization of your difficult child. When do you call for help with transport, the level of physical aggression, self harm, distorted thoughts, etc.
Who will let the hospital know (psychiatrist hopefully) that difficult child needs a bed? Will he back this up with the appropriate documentation needed at time of admit?
Be prepared for a long admit process. The shortest admit we've endured was 4 hours; that was because wm was so very out of control & had 2 security guards on him at the time.
A SW will interview you & help determine the need for a bed unless psychiatrist clears the way for you.
I hope this helps some. Have you checked into a day treatment program or is difficult child to the point of physical harm or self harming behaviors?
Hang in there.