## Investigation of Choice for Alcohol Withdrawal Assessment **Key Point:** The CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol Scale) is the gold-standard, validated instrument for diagnosing and grading the severity of alcohol withdrawal syndrome in real-time. ### Why CIWA-Ar is Correct The CIWA-Ar is a 10-item bedside scale that: - Quantifies withdrawal severity (mild, moderate, severe) - Guides pharmacological intervention thresholds - Monitors response to treatment over time - Requires no laboratory processing — results are immediate - Scores ≥15 indicate severe withdrawal requiring intensive monitoring; scores <10 suggest mild withdrawal **High-Yield:** CIWA-Ar includes assessment of tremor, diaphoresis, anxiety, agitation, tactile/auditory/visual disturbances, and headache — all clinical features present in this patient. ### Why Other Investigations Are Not First-Line | Investigation | Role | Limitation in Acute Withdrawal | |---|---|---| | **LFTs & PT** | Assess liver synthetic function and cirrhosis risk | Useful for prognosis but NOT diagnostic of withdrawal; delayed results | | **Serum ethanol & glucose** | Rule out hypoglycemia; confirm recent drinking | Ethanol level does NOT correlate with withdrawal severity; glucose is supportive only | | **EEG & neuroimaging** | Detect seizure activity or structural lesions | Reserved for atypical presentations, focal neurological signs, or failed standard management | **Clinical Pearl:** A patient with tremor, diaphoresis, and autonomic hyperactivity 18 hours post-cessation has classic early withdrawal. CIWA-Ar scoring immediately guides benzodiazepine dosing and prevents progression to severe withdrawal or seizures. **Mnemonic — CIWA-Ar Components:** **TAAAVH** = Tremor, Anxiety, Agitation, Auditory/visual/tactile disturbances, Headache (plus nausea, sweating, orientation).
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