CC CJM | DKA v HHS

. DM Classification & Core Diagnostics Type 1 DM: Autoimmune β-cell destruction (HLA-DR3/DR4) causing absolute insulin deficiency; presents abruptly with classic 3 Ps (polyuria, polydipsia, polyphagia), weight loss, and DKA risk[1][2]. Type 2 DM: Insulin resistance combined with relative β-cell deficiency and inappropriate hepatic glucose production[3]. Onset is gradual[4]. Diagnostic Criteria: A1C ≥6.5%, Fasting Plasma Glucose ≥126 mg/dL, 2-hr OGTT ≥200 mg/dL, or Random Glucose ≥200 mg/dL with classic symptoms[5]. Glycemic target A1C is <7.0%[6]. 2. High-Yield Pharmacotherapy & Insulin Dynamics Insulin Types: Rapid-acting (lispro, aspart; onset 10–30 min, mealtime bolus), Short-acting (Regular; onset 30–60 min, only IV insulin), Intermediate (NPH; peaks 4–12 hr, cloudy), Long-acting (glargine, detemir; peakless basal)[7]. Basal-Bolus Strategy: Optimal plan mimicking normal endogenous insulin secretion[7]. Key Oral Agents: Metformin (Biguanide) reduces hepatic glucose output[10]. Safety Alert: Discontinue metformin 48 hr before/after IV contrast to prevent acute kidney injury and lactic acidosis[10][11]. Sulfonylureas (glipizide) stimulate insulin release and carry high hypoglycemia risk[11][12]. 3. Hyperglycemic Emergencies: DKA vs. HHS DKA (T1DM): Absolute insulin deficiency → uncontrolled lipolysis → ketone bodies → metabolic acidosis (pH <7.30, HCO₃⁻ <16 mEq/L), Kussmaul respirations, fruity breath, glucose >250 mg/dL[13][14]. HHS (T2DM): Enough circulating insulin prevents ketosis, but severe hyperglycemia (>600 mg/dL) causes osmotic diuresis, hyperosmolality, and profound neurologic deficits (coma, seizures)[15][16]. Emergency Treatment Protocol: IV Fluids: First priority. 0.9% NaCl (1 L/hr) to maintain urine output (30–60 mL/hr)[14][15]. Add 5%–10% dextrose when glucose reaches ~250 mg/dL to prevent hypoglycemia and cerebral edema[14][15]. Potassium: Check K⁺ BEFORE starting insulin. Insulin shifts K⁺ intracellularly, causing life-threatening hypokalemia if uncorrected[15]. Continuous IV Regular Insulin: 0.1 U/kg/hr; target glucose reduction of 36–54 mg/dL/hr[15]. 4. Hypoglycemia & Chronic Complications Hypoglycemia (<70 mg/dL): Treat via Rule of 15 (15–20g fast-acting carbs, recheck in 15 min)[16][17]. Unconscious: 20–50 mL 50% Dextrose IV or 1 mg Glucagon IM/SQ (turn on side to prevent aspiration)[17]. Chronic Complications: Driven by angiopathy[18]. Macrovascular (CVD, stroke, PAD) managed via BP (<140/90) and lipid control[19]. Microvascular annual screening: Retinopathy (dilated eye exam), Nephropathy (urine albumin/creatinine; treat with ACEi/ARBs), and Neuropathy (monofilament test, daily foot inspection)[20].