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code🏥 USMLE Step 2 ├── 📖 Chapter 1: Emergency Medicine and Critical Care Algorithms │ ├── 🔹 Acetaminophen Intoxication │ ├── 🔹 Blunt Chest Trauma │ └── 🔹 Approach to Adult Cardiac Arrest ├── 📖 Chapter 2: Pediatric and Neonatal Algorithms │ ├── 🔹 Approach to Neonatal Cholestasis │ ├── 🔹 Approach to the Straining Infant │ └── 🔹 Evaluation of Bilious Emesis in the Neonate ├── 📖 Chapter 3: Endocrine and Metabolic Algorithms │ ├── 🔹 Diagnosis of Hypercalcemia │ ├── 🔹 Approach to Hypocalcemia │ ├── 🔹 Evaluation of Thyroid Nodules │ ├── 🔹 Evaluation of Hyperthyroidism │ ├── 🔹 Treatment of Hypertriglyceridemia │ ├── 🔹 Evaluation of Hyponatremia │ └── 🔹 Water Deprivation Test ├── 📖 Chapter 4: Cardiovascular and Pulmonary Algorithms │ ├── 🔹 Approach to Wide-Complex Tachycardia │ ├── 🔹 Diagnostic Approach for Suspected Aortic Dissection │ ├── 🔹 Initial Stabilization of Acute ST-Elevation MI │ ├── 🔹 Evaluation of Chest Pain in the Emergency Department │ ├── 🔹 Diagnostic Strategy in Suspected Pulmonary Embolism │ ├── 🔹 Approach to Patient with Suspected Pulmonary Embolism │ ├── 🔹 Evaluation of Hemoptysis │ └── 🔹 Evaluation of Suspected Unstable Abdominal Aortic Aneurysm ├── 📖 Chapter 5: Neurology and Musculoskeletal Algorithms │ ├── 🔹 Management of Unilateral Facial Weakness │ ├── 🔹 Initial Management of Stroke │ └── 🔹 Evaluation of Vertebral Osteomyelitis ├── 📖 Chapter 6: Gastroenterology Algorithms │ ├── 🔹 Evaluation of Elevated Alkaline Phosphatase │ ├── 🔹 Approach to Hyperbilirubinemia in Adults │ ├── 🔹 Evaluation of Minimal Bright Red Blood per Rectum │ ├── 🔹 Evaluation of Dysphagia │ ├── 🔹 Variceal Hemorrhage Bleed Algorithm │ ├── 🔹 Management of Cirrhosis │ └── 🔹 Management of Gastric Esophageal Reflux Disease ├── 📖 Chapter 7: Infectious Disease Algorithms │ ├── 🔹 Rabies PEP │ ├── 🔹 Approach to Odynophagia & Dysphagia in Patients with HIV │ └── 🔹 Evaluation of Suspected Ventilator-Associated Pneumonia └── 📖 Chapter 8: Nephrology Algorithms ├── 🔹 Diagnosis of Proteinuria └── 🔹 Evaluation of Hematuria in Children
What this chapter covers: This chapter focuses on algorithms for managing critical conditions like acetaminophen overdose, blunt chest trauma, and cardiac arrest. It emphasizes rapid assessment, stabilization, and intervention strategies. Key aspects include determining the need for activated charcoal in acetaminophen toxicity, assessing hemodynamic stability in trauma, and following ACLS protocols in cardiac arrest. The algorithms provide a structured approach to these high-stakes scenarios.
| Concept/Term | Definition/Description | Clinical Significance | Key Points |
|---|---|---|---|
| Acetaminophen Toxicity | Liver damage due to excessive acetaminophen ingestion. | Can lead to acute liver failure and death. | N-acetylcysteine is the antidote; timing is crucial. |
| Blunt Chest Trauma | Injury to the chest wall and underlying organs from a non-penetrating force. | Can cause pneumothorax, hemothorax, cardiac contusion, and aortic injury. | eFAST is a rapid bedside ultrasound used for initial assessment. |
| Cardiac Arrest | Sudden cessation of cardiac activity. | Requires immediate CPR and defibrillation (if indicated). | Follow ACLS guidelines; identify and treat reversible causes. |
Question: A 25-year-old male presents to the ED after ingesting 10 grams of acetaminophen approximately 2 hours ago. Which of the following is the MOST appropriate initial intervention? A) Administer N-acetylcysteine B) Obtain acetaminophen levels C) Administer activated charcoal D) Observe and monitor
Answer: C Explanation: Activated charcoal is indicated within 4 hours of acetaminophen ingestion to prevent absorption. While acetaminophen levels and N-acetylcysteine may be necessary later, the initial step is to prevent further absorption of the drug.
❌ Mistake 1: Delaying activated charcoal in acetaminophen overdose. ✅ How to avoid: Administer activated charcoal as soon as possible if the patient presents within 4 hours of ingestion.
❌ Mistake 2: Neglecting reversible causes of cardiac arrest (Hs and Ts). ✅ How to avoid: Systematically assess for and treat hypoxia, hypovolemia, hypothermia, hyper/hypokalemia, hydrogen ions (acidosis), tension pneumothorax, tamponade, toxins, and thrombosis.
What this chapter covers: This chapter focuses on algorithms for managing common pediatric and neonatal conditions, including neonatal cholestasis, straining infants, and bilious emesis. It emphasizes the unique diagnostic and therapeutic considerations in these age groups. Key aspects include differentiating between biliary atresia and other causes of cholestasis, distinguishing normal infant dyschezia from constipation, and recognizing malrotation as a cause of bilious emesis.
| Concept/Term | Definition/Description | Clinical Significance | Key Points |
|---|---|---|---|
| Neonatal Cholestasis | Impaired bile flow in newborns. | Can indicate serious liver or biliary tract disorders. | Abdominal ultrasound is the initial diagnostic test. |
| Infant Dyschezia | Straining or crying before passing soft stools in infants. | A normal physiological process, not constipation. | Reassurance and education are key. |
| Bilious Emesis | Vomiting of bile-stained fluid in neonates. | Suggests intestinal obstruction. | Requires prompt evaluation to rule out malrotation. |
Question: A 2-week-old infant presents with jaundice and dark urine. Initial workup reveals elevated direct bilirubin. Which of the following is the MOST appropriate next step in management? A) Liver biopsy B) Abdominal ultrasound C) Hepatobiliary scan D) Genetic testing
Answer: B Explanation: Abdominal ultrasound is the initial diagnostic test for neonatal cholestasis to evaluate for biliary atresia or other structural abnormalities.
❌ Mistake 1: Misdiagnosing normal infant dyschezia as constipation. ✅ How to avoid: Assess stool consistency; dyschezia involves straining before passing soft stools.
❌ Mistake 2: Delaying evaluation of bilious emesis in neonates. ✅ How to avoid: Promptly evaluate for intestinal obstruction, especially malrotation.
What this chapter covers: This chapter focuses on algorithms for managing endocrine and metabolic disorders, including hypercalcemia, hypocalcemia, thyroid nodules, hyperthyroidism, hypertriglyceridemia, and hyponatremia. It emphasizes the diagnostic and therapeutic considerations for these conditions. Key aspects include differentiating between PTH-dependent and PTH-independent hypercalcemia, identifying the cause of hypocalcemia based on PTH levels, and managing hypertriglyceridemia to prevent pancreatitis.
| Concept/Term | Definition/Description | Clinical Significance | Key Points |
|---|---|---|---|
| Hypercalcemia | Elevated serum calcium levels. | Can cause renal stones, bone pain, and abdominal groans. | Check PTH levels to differentiate causes. |
| Hypocalcemia | Decreased serum calcium levels. | Can cause tetany, seizures, and cardiac arrhythmias. | Check PTH and magnesium levels. |
| Hyperthyroidism | Excessive thyroid hormone production. | Can cause weight loss, anxiety, and palpitations. | Radioactive iodine uptake scan helps differentiate causes. |
| Hypertriglyceridemia | Elevated triglyceride levels in the blood. | Increases risk of pancreatitis and cardiovascular disease. | Lifestyle modifications and medications are used for management. |
| Hyponatremia | Low serum sodium levels. | Can cause confusion, seizures, and coma. | Assess serum osmolality and urine sodium to determine the cause. |
Question: A 60-year-old female presents with fatigue and constipation. Her serum calcium is 12.5 mg/dL (normal 8.5-10.5 mg/dL), and PTH is elevated. Which of the following is the MOST likely diagnosis? A) Vitamin D toxicity B) Primary hyperparathyroidism C) Sarcoidosis D) Malignancy
Answer: B Explanation: Elevated calcium with elevated PTH suggests primary hyperparathyroidism.
❌ Mistake 1: Failing to correct calcium for albumin levels. ✅ How to avoid: Use corrected calcium formula or measure ionized calcium.
❌ Mistake 2: Not considering secondary causes of hypertriglyceridemia. ✅ How to avoid: Evaluate for diabetes, hypothyroidism, and medications.
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