Diabetic Ketoacidosis In the ED: Too Sweet to Handle

-Case-
A 25-year-old man with type 1 diabetes presents with abdominal pain, vomiting, and confusion. His breath smells fruity, and he’s breathing rapidly. You grab a point-of-care glucose: 450 mg/dL. Labs confirm metabolic acidosis with an anion gap and a potassium of 5.2.

-Evaluation-
DKA occurs when insulin deficiency leads to unchecked lipolysis and ketone production, causing metabolic acidosis. It’s more common in type 1 diabetics but can also occur in type 2 under certain circumstances.

  • Symptoms:
    • Nausea/vomiting, abdominal pain, polyuria, polydipsia, fatigue, altered mental status
  • Classic Findings:
    • High glucose (typically well above 250 mg/dL), anion gap metabolic acidosis, positive ketones
    • Potassium may appear elevated due to acidosis but total body stores are depleted

-Management-

  1. Fluid Resuscitation:
    • Start with normal saline (1-2L bolus over first hour), then adjust based on hemodynamics and sodium level
  2. Insulin Therapy:
    • Begin regular insulin infusion after initial fluids
    • Hold insulin if K<3.3 (replace potassium first!)
  3. Electrolyte Monitoring:
    • Replace potassium aggressively as insulin drives it into cells
    • Monitor glucose, electrolytes, and venous pH every 1-2 hours
  4. Address Underlying Cause:
    • Missed insulin dose, infection, MI, pancreatitis, etc.
  5. Transition to SubQ Insulin:
    • Once anion gap closes, patient is eating, and pH normalizes

-Fast Facts-

  • DKA is a medical emergency that requires ICU-level monitoring
  • Total body potassium is low even if serum levels are high
  • Do not start insulin until potassium is confirmed > 3.3
  • Fluids first, then insulin
  • Don’t forget to look for the precipitating cause!

DKA can spiral quickly, but with prompt fluids, insulin, and electrolyte correction, patients improve dramatically. This is one of those critical emergencies where early intervention can literally bring someone back from the brink!

Want to learn more? Read our in-depth study guide and listen to our podcast episode on this topic!

Cheers,

Tamir Zitelny, MD

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-References-

  1. Kitabchi AE, Umpierrez GE, Miles JM, Fisher JN. Hyperglycemic crises in adult patients with diabetes. Diabetes Care. 2009;32(7):1335-1343. doi:10.2337/dc09-9032
  2. Fayfman M, Pasquel FJ, Umpierrez GE. Management of hyperglycemic crises: diabetic ketoacidosis and hyperglycemic hyperosmolar state. Med Clin North Am. 2017;101(3):587-606. doi:10.1016/j.mcna.2016.12.011
  3. Barski L, Nevzorov R, Rabaev E, et al. Comparison of diabetic ketoacidosis in patients with type-1 and type-2 diabetes mellitus. Am J Med Sci. 2013;345(4):326-330. doi:10.1097/MAJ.0b013e31828a34e7
  4. Gosmanov AR, Gosmanova EO, Dillard-Cannon E. Management of adult diabetic ketoacidosis. Diabetes Metab Syndr Obes. 2014;7:255-264. doi:10.2147/DMSO.S50516
  5. Savage MW, Dhatariya KK, Kilvert A, et al. Joint British Diabetes Societies guideline for the management of diabetic ketoacidosis. Diabet Med. 2011;28(5):508-515. doi:10.1111/j.1464-5491.2011.03246.x
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