What is the typical starting dose and monitoring for a patient on continuous insulin infusion in DKA?

What is the typical starting dose and monitoring for a patient on continuous insulin infusion in DKA?

• A. Start at 0.1 units/kg/hour; monitor glucose hourly and potassium every 2-4 hours; switch to dextrose when glucose falls below ~200 mg/dL.
• B. Start at 1 unit/kg/hour; monitor glucose every 6 hours; potassium never checked
• C. Start at 0.01 units/kg/hour; no glucose monitoring
• D. Start at 0.2 units/kg/hour; monitor glucose hourly; potassium daily; switch when glucose <50

Answer: (A)

In DKA, IV insulin is started to halt ketogenesis and correct hyperglycemia without causing dangerous shifts in electrolytes. The standard starting rate is 0.1 units per kilogram per hour because it reliably lowers glucose and suppresses ketone production without overshooting into hypoglycemia. Higher rates risk rapid glucose drops and electrolyte disturbances, while much lower rates slow resolution. Glucose is checked about every hour to track the rate of decline and adjust therapy safely. Potassium is monitored every 2–4 hours because insulin drives potassium into cells and treatment can rapidly lower serum potassium; if potassium is low, you must correct it and may hold insulin until K+ is safely higher. Dextrose-containing fluids are added when the glucose falls to around 200 mg/dL to keep insulin on board for continued treatment of ketoacidosis while preventing hypoglycemia.

In DKA, IV insulin is started to halt ketogenesis and correct hyperglycemia without causing dangerous shifts in electrolytes. The standard starting rate is 0.1 units per kilogram per hour because it reliably lowers glucose and suppresses ketone production without overshooting into hypoglycemia. Higher rates risk rapid glucose drops and electrolyte disturbances, while much lower rates slow resolution.

Glucose is checked about every hour to track the rate of decline and adjust therapy safely. Potassium is monitored every 2–4 hours because insulin drives potassium into cells and treatment can rapidly lower serum potassium; if potassium is low, you must correct it and may hold insulin until K+ is safely higher.

Dextrose-containing fluids are added when the glucose falls to around 200 mg/dL to keep insulin on board for continued treatment of ketoacidosis while preventing hypoglycemia.