Examkin

Soru

Zorluk: OrtaSubstance-Related and Addictive Disorders

Campus security brings a 19-year-old male university student to the emergency department after he was found destroying furniture in his dormitory. The student's friends report that he went to an off-campus warehouse party three days ago and has been awake ever since. He has been barricaded in his room, loudly claiming that hidden cameras are broadcasting his thoughts. Vital signs show a temperature of 38.6°C (101.5°F), blood pressure of 172/105 mmHg, and heart rate of 138/min. Physical examination reveals profound diaphoresis, mydriasis, and psychomotor agitation. There is no horizontal or vertical nystagmus, and muscle tone is normal. Routine urine drug immunoassay is negative for all tested substances. The patient requires multiple doses of chemical restraints over the next four days to manage ongoing severe combativeness and hallucinations. Which of the following is the most likely diagnosis?

  1. A
    Brief psychotic disorder
  2. B
    Cocaine intoxication
  3. Synthetic cathinone intoxicationCevap
  4. D
    Phencyclidine intoxication
  5. E
    Schizophreniform disorder

Cevap

Synthetic cathinone intoxication
The patient's presentation of severe psychosis, extreme agitation, and profound sympathetic overactivity (tachycardia, hypertension, hyperthermia, diaphoresis, mydriasis) is characteristic of sympathomimetic intoxication. While cocaine and amphetamines present similarly, their duration of action is much shorter (clearing within hours). In contrast, synthetic cathinones (often sold as 'bath salts') are structurally related to amphetamines but can cause exceptionally prolonged delirium and psychosis that routinely last for days to over a week, necessitating prolonged chemical restraints. Furthermore, unlike cocaine, opioids, and PCP, synthetic cathinones are not detected by routine urine drug immunoassays. The combination of prolonged sympathomimetic toxicity, extreme combativeness, and a negative routine toxicology screen makes synthetic cathinone intoxication the most likely diagnosis.

Adım Adım Çözüm

1
Analyze the clinical presentation.
The patient exhibits severe acute psychosis, extreme agitation, and profound sympathetic overactivity (tachycardia, hypertension, hyperthermia, diaphoresis, mydriasis).
Identifying the toxidrome helps narrow down the etiology to sympathomimetic agents rather than primary psychiatric disorders.
2
Evaluate the timeline and diagnostic findings.
The symptoms have lasted for days, and the routine urine drug screen is negative.
This rules out shorter-acting substances like cocaine and typical amphetamines, and highlights a substance not detected on standard assays.
3
Synthesize the data to identify the specific substance.
Prolonged sympathomimetic toxicity with delirium/psychosis and a negative drug screen is characteristic of synthetic cathinones.
Synthetic cathinones evade routine detection and cause exceptionally long-lasting clinical effects.

Anahtar Kavram

Synthetic cathinones ('bath salts') are amphetamine analogs that cause prolonged sympathetic overactivity and extreme psychosis/agitation, typically lasting days to a week, and are not detected on standard urine drug screens.
Bu soruyu puanla

Konular

Substance-Related and Addictive Disorders

Bu konudan daha fazla soru