Heiner JD and Moore GP.  The<unk> .  In: Marx J, Walls R, Hockberger R, eds.  Rosen's Emergency Medicine: Concepts and Clinical Practice.  8th ed.  Philadelphia, PA: Elsevier/Saunders; 2014: 188: 2414-2421.
Moore GP, Pfaff JA.  Assessment and emergency management of the acutely agitated or violent adult.  UpToDate.  Feb 16, 2017.
Combative patient
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Asplenic patient
Psychiatric
The obese patient
Schizophrenia, paranoid ideation, catatonic excitement
Second victim
Mania