mEq/L
How it's calculated
Severity is graded by whichever single parameter — pH, bicarbonate, or mental status — falls into the worst (most deranged) band, not an average of all three.
Severity bands
| Mild | Moderate | Severe | |
|---|---|---|---|
| Arterial pH | 7.25-7.30 | 7.00-7.24 | <7.00 |
| Bicarbonate | 15-18 mEq/L | 10-14.9 mEq/L | <10 mEq/L |
| Mental status | Alert | Alert/drowsy | Stupor/coma |
Clinical use
- Guides the intensity of monitoring and treatment setting — severe DKA generally warrants ICU-level care.
- All 3 components (ketosis/anion gap, hyperglycaemia, and acidosis) should be present to diagnose DKA in the first place; this classification is for grading severity once DKA is diagnosed.
- Management follows standard protocols regardless of severity grade — IV fluids, insulin infusion, and potassium replacement — but severe cases need closer monitoring and often a higher level of care.
Frequently asked questions
How is DKA severity classified?
By the most deranged of three parameters — arterial pH, serum bicarbonate, and mental status — using ADA/Joint British Diabetes Societies-based cutoffs for mild, moderate, and severe DKA.
Does severe DKA always need ICU admission?
Severe DKA (pH <7.00, bicarbonate <10, or stupor/coma) generally warrants ICU-level monitoring given the risk of rapid deterioration, though the exact admission threshold depends on local protocols and resources.
Is this tool used to diagnose DKA?
No — it grades severity once DKA is already diagnosed (based on hyperglycaemia, ketosis/elevated anion gap, and acidosis being present), not to make the initial diagnosis.
References
- Kitabchi AE, et al. Hyperglycemic crises in adult patients with diabetes. Diabetes Care. 2009;32:1335-1343.
- Joint British Diabetes Societies for Inpatient Care. The Management of Diabetic Ketoacidosis in Adults.