A 16-year-old boy is brought to the physician by his parents due to behavioral changes and declining school performance over the past three months. The parents report that he has been isolating himself in his bedroom, and they recently discovered a stash of empty computer duster aerosol cans under his bed. When questioned, the patient is evasive, irritable, and refuses to make eye contact. Vital signs are within normal limits. On physical examination, the patient has a mildly broad-based gait and slight dysarthria. An erythematous, eczematous rash is observed surrounding his mouth and nostrils. This patient's current substance use places him at greatest risk for which of the following life-threatening complications?
- ASubacute combined degeneration of the spinal cord
- BIschemic necrosis of the nasal septum
- Fatal ventricular arrhythmiaCevap
- DSpontaneous pneumothorax
- EHypertensive encephalopathy
Cevap
Fatal ventricular arrhythmia
The patient's presentation of behavioral changes, cerebellar symptoms (ataxia, dysarthria), a perioral/perinasal rash ('glue sniffer's rash'), and a history of hoarding aerosol cans is highly characteristic of inhalant abuse. Aerosol dusters contain volatile fluorocarbons. A major, acute, life-threatening complication of volatile solvent and aerosol abuse is 'sudden sniffing death syndrome.' This occurs because the highly lipophilic inhaled chemicals rapidly cross the blood-brain barrier and strongly sensitize the myocardium to endogenous catecholamines. A sudden surge in catecholamines (e.g., if the user is startled, physically active, or running from parents) can trigger a fatal ventricular arrhythmia, such as ventricular fibrillation, even in previously healthy adolescents.
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Anahtar Kavram
Inhalant abuse (e.g., volatile solvents, aerosols) classically presents with perioral dermatitis and CNS depression, and uniquely predisposes patients to 'sudden sniffing death syndrome' via myocardial sensitization to catecholamines, resulting in fatal ventricular arrhythmias.