Management of Hyperglycemia in Type 1 Diabetes During Acute Stroke

Critical Decision Points

The American Heart Association/American Stroke Association guidelines recommend initiating insulin therapy for persistent hyperglycemia starting at a threshold of 180 mg/dL, with a target glucose range of 140-180 mg/dL for critically ill patients 1, 2, 3, 7
Initiate intravenous insulin therapy when blood glucose persistently exceeds 180 mg/dL 1, 4
The patient has type 1 diabetes, which is an absolute insulin requirement 5, 6
Stress steroids are administered, which significantly increases insulin resistance 1
The patient is critically ill or in the acute stroke phase 5

Check current blood glucose immediately and if glucose >180 mg/dL, start IV insulin infusion 1, 4, 5
Use regular insulin at 1 unit/mL concentration and prime tubing with 20 mL waste volume 5
Initial infusion rate typically 0.5 units/hour, adjusted to maintain glucose 140-180 mg/dL 2, 3
Monitor blood glucose every 1-2 hours initially 1, 5

The consensus recommendation is to target 140-180 mg/dL rather than normoglycemia 1, 2, 3, 4, 7
Meta-analyses revealed increased rates of severe hypoglycemia and mortality in tightly controlled cohorts compared to moderate control 1

Intravenous insulin is preferred for type 1 diabetes patients who are hemodynamically unstable or critically ill 5
Stress steroids significantly increase insulin resistance, often requiring 2-3 times the usual insulin dose 1
Frequent glucose monitoring is mandatory—every 1-2 hours initially 1, 5