Psychiatry · Mood Disorders
The facts most likely to be tested
Press 1–5 to rate · ↑↓ to navigate
Highest risk is in elderly white males, and a prior suicide attempt is the strongest single predictor of completed suicide.
Risk escalates with a specific plan, intent, and means (e.g., a loaded gun), profound hopelessness, and giving away possessions.
The gold standard assessment is a direct clinical interview of the triad ideation, plan, and intent; asking about suicide does not increase risk.
The SAD PERSONS scale stratifies risk, with a score of >= 6 prompting consideration of psychiatric hospitalization.
The absolute first step is patient safety via 1:1 continuous observation and removing all dangerous objects.
Patients with intent and a plan need immediate inpatient admission, using an involuntary 72-hour hold if they refuse.
Lithium and clozapine are the only medications proven to specifically reduce suicide risk; a sudden flight into health (unexpected calm) is an ominous warning sign.
Vignette unlocked
A 68-year-old widowed man with major depression is brought in by his daughter, who found a loaded handgun and a note in his room. He states he has been giving away his fishing equipment and feels his family would be better off without him. He admits to a plan to shoot himself this weekend and made a serious attempt by overdose two years ago. He appears hopeless and refuses voluntary admission.
Which of the following is the most appropriate next step in management?
Involuntary psychiatric hospitalization with 1:1 observation
A patient with a specific plan, intent, lethal means, hopelessness, and a prior attempt is at imminent risk and requires immediate inpatient admission, using an involuntary hold if he refuses. A prior attempt is the strongest single predictor of completed suicide, mandating continuous 1:1 observation.
Full handout
High yield triage
Etiology / Epidemiology
Highest risk in elderly white males and patients with a prior suicide attempt.
Clinical Manifestations
Patient expresses a specific plan, intent, and means to end their life, often accompanied by hopelessness and giving away possessions.
Diagnosis
Clinical assessment using the SAD PERSONS scale and direct questioning regarding ideation, plan, and intent.
Treatment
Requires immediate psychiatric hospitalization (involuntary if necessary) and initiating 1:1 continuous observation.
Prognosis
Discharge with active intent carries imminent mortality risk; prior attempt is the strongest single predictor of future completed suicide.
Full handout
Epidemiology & Etiology
The strongest single risk factor is a history of a previous suicide attempt. Demographically, elderly white males have the highest rate of completed suicide, while women have a higher rate of attempts. Major psychiatric illnesses, particularly Major Depressive Disorder, bipolar disorder, and substance use disorders, are present in >90% of completed suicides. Access to firearms in the home significantly increases the risk of a fatal outcome.
Pertinent Anatomy
The neuroanatomy of suicide often implicates the ventromedial prefrontal cortex and the amygdala, regions responsible for impulse control and emotional regulation. Dysfunction in these areas contributes to the impaired decision-making and heightened emotional pain seen in acute suicidal crises.
Pathophysiology
Suicidal behavior is strongly linked to decreased serotonergic activity in the central nervous system. This is evidenced by low levels of 5-HIAA (a serotonin metabolite) in the cerebrospinal fluid of patients who have attempted or completed suicide. Genetic vulnerabilities combined with acute psychosocial stressors lead to overwhelming hopelessness and cognitive rigidity, driving the transition from ideation to intent.
Clinical Manifestations
Patients present with active thoughts of self-harm coupled with a formulated plan and intent to act. Warning signs include giving away prized possessions, a sudden unexpected flight into health (sudden calmness after a period of severe depression), and profound hopelessness. Red flags demanding immediate action include the presence of lethal means (e.g., loaded gun) and command auditory hallucinations directing self-harm.
Diagnosis
The gold standard is a direct clinical interview explicitly assessing the triad of ideation, plan, and intent. Risk stratification frequently utilizes the SAD PERSONS scale, where a score of >=8 requires psychiatric hospitalization. Clinicians must ask directly about suicide, as this does not increase the risk of precipitating an attempt.
Treatment
The absolute first step is ensuring patient safety via 1:1 continuous observation and removing all potentially dangerous objects from the room. Patients with intent and a plan require immediate inpatient psychiatric admission, utilizing an involuntary 72-hour hold if the patient refuses voluntary admission. Long-term management involves treating the underlying disorder, with Lithium and Clozapine being the only medications proven to specifically reduce suicide risk.
Prognosis
The immediate prognosis relies entirely on securing the patient's environment, as discharge with active intent carries a high risk of imminent mortality. Following a failed attempt, the risk of a subsequent attempt remains critically elevated, particularly within the first 30 days post-discharge. Regular follow-up and restriction of lethal means (e.g., removing firearms) are mandatory to prevent future tragedies.
Differential Diagnosis
1. Passive Suicidal Ideation: Thoughts of death (e.g., "I wish I wouldn't wake up") but explicitly lacks a specific plan or intent to self-harm.
2. Non-Suicidal Self-Injury (NSSI): Intentional damage to body tissue (e.g., cutting) for emotional relief, characterized by an absence of intent to die.
3. Major Depressive Disorder: Presents with pervasive sadness and anhedonia, which may include suicidal thoughts, but intent must be actively ruled out.
4. Borderline Personality Disorder: Chronic feelings of emptiness and recurrent suicidal gestures that are often interpersonally driven or reactive to abandonment.