Source / episode info
- **Episode:**566
- **Title:**DIP Ep 566: 2024 USMLE Step 3 Free 137 Discussion Part 12 (Q111-120, super helpful for Step 2!)
- **Published:**2025-01-30
- Source:Episode page
One-liner
This episode provides a high-yield review covering complex board topics including pedigree analysis principles, management of sacral pressure ulcers, primary prevention of CAD via risk factor modification, the mixed acid-base disorder seen in aspirin toxicity, updated cervical screening guidelines (HPV co-testing), diagnosis and prognosis of viral myocarditis, motor neuron disease progression, chronic constipation workup, and acute syncope management.
High-yield summary
- Sacral Ulcers: The most critical intervention for pressure ulcers is frequent repositioning to relieve pressure on the underlying tissues; nutritional support (protein) is secondary.
- Aspirin Toxicity: This presents as a mixed acid-base disorder: Metabolic Acidosis (due to salicylic acid) combined with Respiratory Alkalosis (due to compensatory hyperventilation). Treatment involves administering sodium bicarbonate to alkalize urine and enhance salicylate excretion.
- Cervical Screening: For women aged 30–65, co-testing of Pap smear and HPV DNA every five years is the recommended screening interval.
- Viral Myocarditis: The classic presentation includes a preceding Upper Respiratory Infection (URI) followed by signs of heart failure (S3 gallop, crackles, dilated cardiomyopathy). Coxsackie B virus is the most common etiology.
- ALS Prognosis: Among multiple potential complications, bulbar weakness and dysphagia are the factors that most severely impact life expectancy due to high risk of aspiration pneumonia.
- Syncope Management: If syncope is associated with symptomatic bradycardia (low HR, low BP), the initial management step is administering an acetylcholinesterase inhibitor like atropine or preparing for pacing.
Learning objectives
- Differentiate between various inheritance patterns using pedigree analysis principles.
- Identify and prioritize interventions for pressure ulcers based on pathophysiology (pressure relief > nutrition).
- Recognize the classic clinical presentation, etiology, and acute management of aspirin toxicity.
- Apply current guidelines for cervical cancer screening (Pap smear/HPV co-testing intervals).
- Diagnose viral myocarditis by linking preceding infections to subsequent cardiac failure symptoms.