Suicide

1. THE 2-MINUTE PHYSIOLOGY (Rapid Pathophysiology)

• The Acute Crisis State: While suicide is a psychiatric rather than a purely physiologic cellular breakdown, the core concept for the emergency provider is recognizing that many suicide attempts occur during an acute, time-limited crisis. This crisis is frequently triggered by a personal loss or the sudden exacerbation of an underlying psychiatric disorder.
• Ambivalence and Reversibility: The most important psychological mechanism to understand is that suicidal patients are typically ambivalent about dying. Because the acute crisis is usually resolvable or treatable, an empathetic, evidence-based approach in the ED offers a critical window of opportunity to save a life, as patients are often grateful for intervention once the immediate crisis begins to pass.

2. THE BEDSIDE ACTION PLAN (Rapid ER Management)

• Immediate Safety & Stabilization: The primary resuscitation goal is immediate medical stabilization of any injuries or toxicological ingestions. Simultaneously, ensure patient safety within the ED by placing the patient on strict 1:1 continuous observation in a safe, medically supervised environment.
• Collateral Information: Because suicidal patients may be poor historians or actively conceal their ingestions/actions, you must aggressively obtain collateral information from guardians, friends, bystanders, or EMS personnel.
• Medical Clearance: Treat and stabilize any acute medical issues before attempting to finalize psychiatric disposition.

3. THE DIAGNOSTIC GRID (Differential Diagnosis & Workup)

• Top "Can't-Miss" Medical Mimics of Depression/Suicidality:
• Neurologic/Autoimmune: NMDA receptor encephalitis, Traumatic Brain Injury, Epilepsy.
• Metabolic/Endocrine: Hypothyroidism, profound electrolyte abnormalities, vitamin deficiencies.
• Toxicologic Mimics (Drugs/Medications): Alcohol, Barbiturates, Benzodiazepines, Cocaine, Methamphetamines, Corticosteroids, and Isotretinoin.
• Infectious: Mononucleosis.
• Prioritized Diagnostic Workup:
• Tier 1: The extent of the laboratory workup should be guided by symptoms and clinical findings. However, initial baseline testing generally includes a CBC, electrolytes, beta-HCG (for females), thyroid function tests, and a urine toxicology screen.
• Tier 2 (The Hidden Toxins): Always obtain serum salicylate and acetaminophen levels to rule out occult, delayed-onset lethal ingestions, even if the patient denies taking them.

4. THE VISUAL BOARD (ECG / POCUS / Imaging)

• The 12-Lead ECG: While not explicitly detailed as a standalone psychiatric test, the ECG is a mandatory visual tool for any patient presenting with a suicide attempt to screen for occult toxicological ingestions. You must actively look for QRS widening, QTc prolongation, or terminal R waves in aVR (classic for tricyclic antidepressants or other sodium channel blockers).
• Neuroimaging (CT Head): Consider a non-contrast head CT if the patient presents with an altered mental status, signs of head trauma, or if an intracranial hemorrhage is suspected of causing or mimicking the agitated/depressed presentation.

5. THE SCORING MATRIX (Risk Stratification & Guidelines)

• Capacity Assessment: The initial step in risk stratification is determining if the patient has clinical capacity. If the patient lacks capacity, they must be treated, observed, and continuously reassessed.
• Risk Factors: High-risk indicators include a previous suicide attempt, underlying mood disorders (depression, anxiety), conduct/personality disorders, psychotic disorders, substance use, and a lack of access to needed resources.
• Disposition Scoring: Once capacity is confirmed, utilize clinical decision support tools:
• Score 0 (Low Risk): These patients can often be managed safely with outpatient care and close follow-up.
• Score 1+ (Moderate/High Risk): These patients mandate admission for formal inpatient psychiatric care.

6. THE DANGER ZONE (Pitfalls & Critical Actions)

• The "Sobering Up" Trap: Pitfall: Assuming an intoxicated patient who made suicidal statements is safe to discharge once they are sober and retract their statements. Critical Action: Intoxicated patients who, once sober, disavow prior suicidal statements absolutely still require a formal suicide risk assessment.
• The AMA Error: Pitfall: Allowing a suicidal patient to leave the ED simply because they are willing to sign "Against Medical Advice" (AMA) forms. Critical Action: Suicidal patients cannot be permitted to leave the ED prior to a risk assessment by signing AMA paperwork; they lack the capacity to make this decision safely.
• The Malingering Bias: Pitfall: Believing that an empathetic approach will simply reinforce malingering behavior and lead to subsequent ED visits. Critical Action: An empathetic, patient-centered approach is standard of care and does not reinforce malingering; it builds rapport and saves lives.

7. MCQ MASTERCLASS (Written Exam Tips)

• Common Distractor: A board question asks about the evaluation of suicidal patients and offers the option: "Intoxicated patients who, once sober, disavow prior suicidal statements do not need a suicide risk assessment." Explanation: This is a classic trap to test your understanding of patient safety. All patients who express suicidality while intoxicated must be formally assessed once clinically sober.
• Common Distractor: An option states: "Suicidal patients can be permitted to leave the ED prior to a risk assessment as long as they sign 'Against Medical Advice' paperwork." Explanation: This is false. A patient with active suicidal ideation lacks the capacity to refuse life-saving psychiatric assessment.
• High-Yield Fact: A true, commonly tested concept is that for patients identified as being at a strictly low risk of imminent suicide, emergency providers can safely consider discharge without a formal consultation with a mental health professional, provided a safe outpatient care plan is established.

8. THE BOARDROOM SCRIPT (OSCE & Oral Board Tips)

• The Opening Salvo: "I recognize this patient is presenting following a suicide attempt. My immediate priorities are to medically stabilize the patient, perform a primary survey, and ensure patient safety by placing them on 1:1 continuous observation in a secure room."
• Articulating the Workup: "Because suicidal patients may conceal their ingestions, I will actively seek collateral information from EMS and the patient's family. Alongside my baseline labs, I am specifically ordering serum acetaminophen and salicylate levels, as well as a 12-lead ECG, to rule out occult toxicological life threats."
• Formulating the Disposition: "The patient is now medically cleared and clinically sober. I will assess their capacity. Given their history of a previous suicide attempt and an underlying mood disorder, they are at high risk for self-harm. I will consult psychiatry for inpatient admission and will not allow the patient to leave against medical advice."