Source / episode info
- **Episode:**98
- **Title:**Divine Intervention Episode 98 – USMLE Step 3/Medicine ITE/ABIM Review Series 4 (Diabetic Emergencies)
- **Published:**2019-05-04
- Source:Episode page
One-liner
This episode details the critical management steps for diabetic emergencies, contrasting DKA (ketosis and acidemia) with HHS (severe volume depletion without ketosis), emphasizing fluid resuscitation using corrected sodium levels, insulin titration based on potassium status, and specific criteria for initiating subcutaneous insulin.
High-yield summary
- DKA vs. HHS: DKA is characterized by ketonuria and acidemia (low bicarbonate); HHS involves extreme volume depletion and severe hyperglycemia but lacks ketosis/acidemia.
- Fluid Resuscitation: Start with a bolus of 0.9% Normal Saline (up to 2–3 L). Maintenance fluids are determined by the corrected sodium: use 0.45% Half Normal Saline if Corrected Na+ is normal or hypernatremic; otherwise, continue 0.9% Normal Saline.
- Potassium Management: Insulin administration must be held if serum potassium < 3.3 mEq/L. If K+ is between 3.3–5.3 mEq/L, supplement fluids with 20 mEq of Potassium per liter.
- Insulin Titration Goal: The goal is a gradual glucose reduction of 50–70 mg/dL per hour. Rapid correction risks cerebral edema.
- Transition to Subcutaneous Insulin: For DKA, start SC insulin when the Anion Gap closes (<12) or Glucose < 200 mg/dL. For HHS, start SC insulin when Glucose < 250 mg/dL AND the patient is demanding food.
- Insulin Overlap: When transitioning from IV to SC insulin, maintain the IV infusion for at least two hours after starting the subcutaneous regimen to prevent rebound hyperglycemia.
Learning objectives
- Differentiate the clinical, biochemical, and laboratory findings distinguishing DKA from HHS.
- Outline the systematic management protocol for diabetic emergencies, prioritizing fluid resuscitation, electrolyte correction, and insulin titration.
- Determine appropriate maintenance intravenous fluids based on calculated corrected sodium levels.
- Identify the specific triggers (Anion Gap closure vs. Glucose level) that mandate the transition from IV to subcutaneous insulin in DKA/HHS.
- Understand the critical role of potassium monitoring in guiding insulin administration and fluid supplementation.