DKA Resolution Criteria — 2024 Consensus
The transition from intravenous to subcutaneous insulin is safe only when the ketoacidotic process has truly reversed. The 2024 consensus defines resolution using two independent domains:
ketonemia and
acid–base status. Glucose concentration is deliberately excluded because hyperglycemia often lags behind metabolic recovery, and normalizing glucose too early can mask ongoing ketogenesis
[2].
DKA is resolved when blood beta-hydroxybutyrate falls below 0.6 mmol/L AND either venous pH is 7.3 or higher OR serum bicarbonate is 18 mEq/L or higher. Both conditions must be met simultaneously; meeting only one is insufficient.
| Option | Ketones (BOHB) | Venous pH | Bicarbonate | Meets ketone rule? | Meets acid–base rule? | DKA resolved? |
|---|
| 1 | 0.5 mmol/L | 7.27 | 16 mEq/L | Yes | No (pH low, HCO3 low) | No |
| 2 | 0.4 mmol/L | 7.31 | 17 mEq/L | Yes | Yes (pH ≥ 7.3) | Yes |
| 3 | 1.4 mmol/L | 7.33 | 19 mEq/L | No | Yes | No |
| 4 | 0.8 mmol/L | 7.36 | 21 mEq/L | No | Yes | No |
Key point! Option 2 has the highest glucose (214 mg/dL) and a bicarbonate still below 18 mEq/L, yet it is the only set that satisfies both the ketone threshold and at least one acid–base criterion. This illustrates why glucose is not a resolution marker and why the acid–base rule uses an “OR” between pH and bicarbonate.
Why beta-hydroxybutyrate matters
In DKA, insulin deficiency shifts hepatic metabolism toward
ketogenesis, producing acetoacetate and beta-hydroxybutyrate (BOHB). BOHB is the predominant ketone body in severe DKA and is the most direct biochemical reflection of ongoing ketone production . Traditional urine ketone testing detects acetoacetate but misses BOHB, which can lead to falsely reassuring results during recovery when BOHB is converted back to acetoacetate. Plasma or capillary BOHB measurement provides a real-time assessment of whether ketogenesis has actually stopped .
The 0.6 mmol/L BOHB cut-point represents the threshold below which clinically significant ketoacidosis is considered reversed. Values above this indicate that insulin deficiency is still driving ketone production, even if the pH has begun to normalize .
Why the acid–base rule uses “pH OR bicarbonate”
Venous pH and serum bicarbonate usually move together, but they can diverge in specific situations. A patient with respiratory compensation (hyperventilation) may have a pH that appears acceptable while bicarbonate remains depleted. Conversely, a patient with mixed acid–base disturbances may have a bicarbonate that looks reasonable while pH is still low. The consensus therefore accepts either parameter as sufficient evidence of acid–base recovery, provided the ketone criterion is also met
[2].
Watch out! Do not use glucose normalization as a proxy for DKA resolution. A patient can have near-normal glucose while still producing ketones if insulin delivery is inadequate relative to ongoing stress or infection. Conversely, glucose may remain elevated for hours after ketogenesis has stopped due to counter-regulatory hormone effects and insulin resistance
[2].
Clinical application to this patient
This 22-year-old woman stopped her insulin during two days of vomiting, creating an absolute insulin deficit. Her weight of 58 kg is relevant for calculating insulin infusion rates, but not for determining resolution. When her BOHB drops below 0.6 mmol/L and her venous pH reaches 7.3 or her bicarbonate reaches 18 mEq/L, the team can safely transition to subcutaneous insulin. Option 2 meets these criteria: ketones 0.4 mmol/L and venous pH 7.31, with bicarbonate still lagging at 17 mEq/L but not disqualifying because the pH rule is satisfied.
References (research sources)