Violence risk assessment in psychosis

Violence Risk Assessment - The Basics

• Approach: Use structured clinical judgment, combining clinical expertise with validated risk factors. Avoid purely intuitive assessments.
• Risk Factors:
  • Static (historical/fixed):
    • History of past violence is the single best predictor.
    • Male gender, younger age, history of substance abuse, antisocial personality traits.
  • Dynamic (clinical/modifiable):
    • Active psychotic symptoms (command hallucinations, persecutory delusions).
    • Medication non-adherence, recent substance use, impulsivity.
    • Access to weapons.

⭐ High-Yield: Always inquire about and document access to firearms. The presence of a gun in the home dramatically increases the risk of lethal violence.

Risk Factors - Static vs. Dynamic

Clinical Evaluation - The Assessment Toolkit

• Foundation: Comprehensive clinical interview focusing on:
  • History of violence: The single best predictor.
  • Substance use, medication non-adherence, impulsivity.
  • Access to weapons.
  • Command hallucinations: Assess nature and intent to act.
• Risk Factors:
  • Static: Unchangeable historical factors (e.g., past violence, psychopathy).
  • Dynamic: Modifiable factors; key treatment targets (e.g., active symptoms, substance use, housing instability).
• Standardized Tools: Augment clinical judgment.
  • Structured Professional Judgment (SPJ): HCR-20 V3, START.
  • Actuarial: VRAG.

⭐ Command hallucinations significantly ↑ risk only when the patient perceives the voice as a threat, has a weapon, and expresses intent to obey the command.

Risk Management - Defusing the Danger

• Immediate Goal: Ensure safety for patient & staff.

  • Verbal De-escalation: Calm, non-threatening approach. Respect personal space, speak simply, offer choices.
  • Environmental Safety: Remove potential weapons, reduce stimuli, have backup staff ready.

• Pharmacological Intervention (If de-escalation fails):

  • Rapid Tranquilization (RT):
    • PO: Lorazepam or an antipsychotic if cooperative.
    • IM: For severe agitation. Common combo: Haloperidol 5mg + Lorazepam 2mg. 📌 "B52" often includes Diphenhydramine 25-50mg.

• Physical Management (Last Resort): Seclusion or restraints if danger is imminent.

⭐ Involuntary treatment is justified only when a patient poses an imminent threat of harm to self/others due to mental illness, and less restrictive measures are insufficient.

High‑Yield Points - ⚡ Biggest Takeaways

• Past violence is the single strongest predictor of future aggression.
• Command hallucinations to harm others, especially with a plan, are a critical, high-risk feature.
• Co-occurring substance use (e.g., alcohol, stimulants) dramatically increases violence risk.
• Persecutory delusions and feelings of being threatened can provoke a violent response.
• Key risk factors include young male sex, impulsivity, and antisocial traits.
• Poor treatment adherence and lack of insight are major dynamic risk factors.