I think it depends on the individual facility's policy. For example at my hospital we can physically restrain them within certain guidelines and administer IMs but we don't use any mechanical restraints ever. This article has information on resources that you could look into and maybe repost with a request for information if any of us have used the different programs. Good luck.
http://72.14.205.104/search?q=cache:...lnk&cd=1&gl=us
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