Management of Hyperglycemia in Post-Stroke Elderly Diabetic Patients
Introduction to Management
- The American Heart Association/American Stroke Association recommends initiating subcutaneous basal-bolus insulin therapy targeting a glucose range of 140-180 mg/dL for post-stroke elderly diabetic patients 1, 2
Insulin Therapy
- Insulin infusion is reserved for persistent hyperglycemia >200 mg/dL during the first 24 hours after stroke, and not for routine management weeks post-stroke 1, 2
- Tight glucose control (80-110 mg/dL) using insulin infusions has demonstrated increased incidence of systemic and cerebral hypoglycemic events and possibly increased mortality risk in patients more than 2 weeks post-stroke 1
- Initiate subcutaneous basal-bolus insulin regimen at 0.3 units/kg/day total daily dose, divided as half basal insulin once daily and half rapid-acting insulin before meals if oral intake is adequate 1, 2
- The target glucose range is 140-180 mg/dL, and glucose levels <80 mg/dL should be avoided as hypoglycemia is particularly dangerous in elderly patients with diabetes 1, 2
Monitoring and Prevention of Complications
- Monitor glucose every 6 hours initially, and check potassium levels before and during insulin therapy to avoid hypokalemia 1, 2
- Never use sliding-scale insulin alone as the single regimen, as it results in undesirable hypoglycemia and hyperglycemia with increased risk of hospital complications 1, 2
- Avoid sulfonylureas, particularly glyburide and chlorpropamide, in elderly patients due to their prolonged half-life and escalating hypoglycemia risk with age 1, 2, 3
Long-Term Management
- For patients with multiple comorbidities, target HbA1c of 8% is appropriate rather than aggressive control 1, 3
- Target blood pressure <140/90 mmHg (or <130/80 mmHg per some guidelines) given the diabetes and stroke history 1
- Continue statin therapy targeting LDL <100 mg/dL (or <70 mg/dL for very high-risk patients) 4, 5