Source / episode info
- **Episode:**248
- **Title:**Divine Intervention Episode 248 – New Step 2CK Free 120 Q 1-10 (2020). A sample approach to reasoning through NBME questions.
- **Published:**2020-07-18
- Source:Episode page
One-liner
This episode provides a comprehensive review strategy across multiple systems, covering the differentials for hepatic encephalopathy (HE), eosinophilic granulomatosis with polyangiitis (EGPA) vasculitis, differentiating urinary retention from incontinence, recognizing drug-induced agranulocytosis, managing septic arthritis, and applying principles of preventive medicine.
High-yield summary
- Hepatic Encephalopathy: The primary treatment for HE is Lactulose, which acidifies the colon and promotes ammonia trapping/excretion via colonic bacteria.
- Vasculitis (EGPA): A classic triad includes asthma, peripheral neuropathy, and eosinophilia. Diagnosis requires high suspicion when a patient presents with multi-system symptoms.
- Drug Toxicity: Anti-thyroid drugs like Methimazole can cause agranulocytosis/leukopenia by suppressing bone marrow function; monitor CBC closely in all patients on these agents.
- Septic Arthritis: The most common bacterial pathogen is Staphylococcus aureus. Empirical treatment requires immediate IV antibiotics (e.g., Vancomycin) after joint aspiration, regardless of Gram stain results.
- Urinary Symptoms: Acute inability to void and draining a large volume of urine strongly suggests urinary retention due to obstruction, which must be differentiated from chronic overflow incontinence.
- Preventive Medicine: When asked for the most likely preventative measure in community settings (e.g., meningitis), always prioritize adherence to established immunization guidelines over environmental changes or prophylactic antibiotics.
Learning objectives
- Differentiate the clinical presentations and underlying pathophysiology of hepatic encephalopathy (HE) from other causes of altered mental status.
- Recognize the classic triad and diagnostic workup for small-vessel vasculitides like EGPA.
- Master the differential diagnosis between urinary retention, overflow incontinence, and stress incontinence based on acute vs. chronic presentation.
- Identify common drug toxicities, specifically agranulocytosis associated with anti-thyroid medications (e.g., Methimazole).
- Establish the immediate management protocol for suspected septic arthritis, including empirical IV antibiotics and joint aspiration.