In a 39-year-old man with a history of chronic alcohol use who underwent Nissen fundoplication, who on postoperative day two develops decreased level of consciousness, visual hallucinations, tremor, and a seizure, what is the most likely diagnosis?

Delirium Tremens

The most likely diagnosis is D) Delirium tremens. This 39-year-old man with chronic alcoholism presenting on postoperative day 2 with decreased consciousness, visual hallucinations, tremor, and seizure exhibits the classic presentation of alcohol withdrawal syndrome progressing to delirium tremens 1.

Clinical Reasoning

Timing and Presentation

The timeline is pathognomonic for delirium tremens:

• Symptoms typically begin 6-24 hours after last alcohol intake and progress to severe forms characterized by delirium tremens, seizures, coma, and potential death 1, 2
• Delirium tremens classically appears 48-72 hours after abstinence (postoperative day 2 fits perfectly) 3, 4, 5
• The constellation of altered mental status, visual hallucinations, tremor, and seizure is characteristic of severe alcohol withdrawal syndrome 6

Why Not the Other Options?

Thiamine (B1) deficiency (Option B) presents differently:

• Wernicke's encephalopathy manifests with the triad of eye movement paralysis, gaze-induced nystagmus, and gait disturbances—not seizures and visual hallucinations as the primary features 7, 8
• Korsakoff syndrome shows anterograde amnesia and decreased word memory 7
• While thiamine deficiency commonly coexists in alcoholics, the acute presentation with seizure points to delirium tremens 6, 9

Hyponatremia (Option C):

• Though hyponatremia can cause altered mental status and is common in cirrhotic patients, it does not typically present with the specific combination of visual hallucinations, tremor, and seizure in this acute postoperative timeframe 9, 8

Stroke (Option A):

• Would present with focal neurological deficits, not the diffuse encephalopathy with tremor and hallucinations seen here

Delayed anesthetic reaction (Option E):

• Postoperative delirium from anesthesia typically occurs within 72 hours but lacks the specific features of tremor, visual hallucinations, and seizure that characterize alcohol withdrawal 10, 11

Critical Management Points

Immediate Treatment Protocol

Benzodiazepines are the gold standard for alcohol withdrawal syndrome and delirium tremens 6, 1, 2, 1, 2:

• For this patient with likely liver disease: Use lorazepam (intermediate-acting benzodiazepine) at 1-4 mg IV every 4-8 hours 6

  • Lorazepam is specifically recommended for patients with severe AWS, liver failure, or serious medical comorbidities 6
  • Safer than long-acting benzodiazepines (diazepam, chlordiazepoxide) in hepatic dysfunction 1, 2

• Thiamine must be administered: 100-300 mg/day IV 6

  • Critical: Give thiamine BEFORE glucose-containing IV fluids to prevent precipitating acute Wernicke's encephalopathy 6, 9, 5

Severity Assessment

• Use CIWA-Ar score: >8 indicates moderate AWS, ≥15 indicates severe AWS 1
• This patient clearly has severe AWS given the seizure and delirium

Common Pitfalls to Avoid

1. Do not use benzodiazepines beyond 10-14 days due to abuse potential 1
2. Avoid haloperidol as first-line treatment—use only as adjunctive therapy for agitation/hallucinations not controlled by benzodiazepines 6, 12
3. Monitor for complications: autonomic instability, fever, dehydration, electrolyte imbalance, concurrent infections, pancreatitis 6, 4
4. This requires ICU-level care given the seizure and severe presentation 3, 4

Disposition

• Admission to ICU is mandatory for delirium tremens with seizures 6
• Mortality from untreated delirium tremens can reach 50% 5
• Psychiatric consultation is recommended for evaluation, acute management, and long-term abstinence planning 6

The postoperative setting with forced abstinence from alcohol created the perfect storm for this patient to develop severe alcohol withdrawal syndrome manifesting as delirium tremens with seizure activity.