Management of Severe Hyperglycemia

Immediate Assessment and Risk Stratification

The American Diabetes Association recommends assessing for diabetic ketoacidosis (DKA) or hyperosmolar hyperglycemic state (HHS) by evaluating mental status, hydration status, presence of vomiting, fruity breath odor, rapid breathing, and severe illness symptoms in patients with blood glucose ≥180 mg/dL 1
The American College of Clinical Endocrinologists suggests that blood glucose ≥180 mg/dL with symptoms such as vomiting, dehydration, altered mental status, or severe illness requires immediate emergency department evaluation 1
The American Diabetes Association recommends checking if the patient can be categorized as critically ill (requiring ICU-level care, on ventilator, hemodynamically unstable) versus noncritically ill, as this determines insulin delivery method 2, 3
The Endocrine Society recommends obtaining A1C if not available from the previous 3 months to distinguish pre-existing diabetes (A1C ≥6.5%) from hospital-related hyperglycemia 2, 3

The American Diabetes Association recommends initiating continuous intravenous insulin infusion immediately when blood glucose exceeds 180 mg/dL in critically ill patients, targeting a glucose range of 140-180 mg/dL (Level A recommendation) 2, 3
The American College of Clinical Endocrinologists suggests that more stringent goals of 110-140 mg/dL may be appropriate for selected stable patients only if achievable without significant hypoglycemia 2, 3
The Endocrine Society recommends using an intravenous insulin protocol that has demonstrated efficacy and safety in achieving the desired glucose range without increasing risk for severe hypoglycemia 2, 3
The American Heart Association recommends avoiding targeting euglycemia (80-110 mg/dL), as the NICE-SUGAR trial demonstrated increased mortality with intensive glucose control compared to conventional control (<180 mg/dL) 4, 5

The American Diabetes Association recommends starting continuous IV insulin infusion using a validated protocol, typically beginning with 0.1 units/kg/hour and titrating to achieve target range in critically ill patients with glucose ≥180 mg/dL 4
The Endocrine Society recommends monitoring blood glucose every 1-2 hours initially until stable within target range, then transition to every 4-6 hours 4

The American College of Clinical Endocrinologists recommends establishing a hypoglycemia management protocol with clear treatment thresholds and documenting and tracking all hypoglycemic episodes in the medical record 2, 3
The American Diabetes Association recommends avoiding blood glucose targets <110 mg/dL, as this increases hypoglycemia risk and mortality 4, 5
The American Heart Association recommends monitoring for severe hypoglycemia (≤40 mg/dL), which occurred in 6.8% of intensive control patients versus 0.5% in conventional control in the NICE-SUGAR trial 5

The American Diabetes Association recommends providing clear diabetes management instructions at discharge and ensuring the diabetes type is clearly identified in the medical record 2, 3
The Endocrine Society recommends documenting appropriate follow-up testing and care at discharge for patients without prior diabetes diagnosis who exhibit hyperglycemia 2, 3