A 12-year-old with new-onset type 1 DM presents in DKA: glucose 480 mg/dL, pH 7.12, bicarbonate 8, Na 128, K 6.2, Glasgow Coma Scale 12/15. After starting IV fluids, the MOST dangerous complication to monitor for during the first 24 hours of management is:

• A Hyperkalemia worsening with insulin initiation
• B Cerebral edema ✓
• C Rebound hyperglycemia from early glucose infusion
• D Pulmonary edema from fluid therapy

Explanation

Cerebral edema complicates 0.5-1% of pediatric DKA episodes but accounts for 60-90% of DKA-related deaths. Risk factors include younger age, new-onset DM, severe acidosis, low pCO2, high BUN, rapid osmolality shifts, and bicarbonate therapy. It typically occurs 4-12 hours after treatment initiation, presenting with headache, altered consciousness, bradycardia, and hypertension. Hyponatremia (128 here) and GCS 12 are additional warning signs. Although hyperkalemia monitoring is important, hypokalemia with insulin is the electrolyte concern; neither matches the mortality risk of cerebral edema.

Reference: Ghai Essential Pediatrics, 10th ed.

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Written and medically reviewed by the StethoPrep medical team.