💧 DKA / HHS Diagnosis and Initial Management
UseInitial assessment and management framing of diabetic ketoacidosis and the hyperglycemic hyperosmolar state.
SourceChinese guidelines for the prevention and treatment of type 2 diabetes / diabetic ketosis blood-ket…
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Methodology · worked example, guidelines & full notes
HHS needs larger volumes.
When to use
Initial assessment and management framing of diabetic ketoacidosis and the hyperglycemic hyperosmolar state.
How it works
DKA: glucose > 13.9 + ketones positive + pH < 7.3 or HCO₃⁻ < 18; severity by pH/HCO₃⁻ (mild 7.25–7.30 / 15–18, moderate 7.0–7.24 / 10–15, severe < 7.0 / < 10). HHS: glucose ≥ 33.3 + effective osmolality > 320 + no significant acidosis/ketosis. The two can coexist.
Key points
- HHS needs larger volumes.
- add dextrose and reduce the rate once glucose reaches [pending update](DKA) / [pending update](HHS).
- Potassium: replace if K < 5.2 with adequate urine output; if K < 3.3 give potassium first and withhold insulin until ≥ 3.3.
- Bicarbonate generally not given (consider only pH < 7.0); always find and treat the trigger (infection most common).
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Glucose | 28 mmol/L |
|---|---|
| Arterial pH | 7.15 |
| HCO₃⁻ | 12 mmol/L |
| Blood ketones ≥ 3 or urine ketones moderate-large | Yes |
| Effective plasma osmolality (optional) | 330 mOsm/kg |
→AssessmentDKA with hyperosmolarity (mixed)
- Diagnostic points：DKA: glucose > 13.9 + blood/urine ketones positive + pH < 7.3 or HCO₃⁻ < 18; HHS: glucose ≥ 33.3 + effective osmolality > 320 + pH > 7.3, HCO₃⁻ > 18, no significant ketosis
- Fluids：HHS has greater water deficit and needs larger volumes
- Insulin：when glucose reaches [pending update](DKA)/[pending update] (HHS) switch to dextrose-containing fluid and reduce to 0.02–0.05
| Glucose | 28 mmol/L |
|---|---|
| Arterial pH | 7.15 |
| HCO₃⁻ | 12 mmol/L |
| Blood ketones ≥ 3 or urine ketones moderate-large | No/weak |
| Effective plasma osmolality (optional) | 330 mOsm/kg |
→AssessmentDoes not meet typical DKA/HHS criteria — re-evaluate clinically
- Diagnostic points：DKA: glucose > 13.9 + blood/urine ketones positive + pH < 7.3 or HCO₃⁻ < 18; HHS: glucose ≥ 33.3 + effective osmolality > 320 + pH > 7.3, HCO₃⁻ > 18, no significant ketosis
- Fluids：HHS has greater water deficit and needs larger volumes
- Insulin：when glucose reaches [pending update](DKA)/[pending update] (HHS) switch to dextrose-containing fluid and reduce to 0.02–0.05
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using DKA / HHS Diagnosis and Initial Management?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- Does DKA / HHS Diagnosis and Initial Management upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is DKA / HHS Diagnosis and Initial Management calculated in practice? Can you show a worked example?
- Inputs: Glucose 28 mmol/L, Arterial pH 7.15, HCO₃⁻ 12 mmol/L, Blood ketones ≥ 3 or urine ketones moderate-large Yes, Effective plasma osmolality (optional) 330 mOsm/kg → Result: Assessment DKA with hyperosmolarity (mixed)（Diagnostic points: DKA: glucose > 13.9 + blood/urine ketones positive + pH < 7.3 or HCO₃⁻ < 18; HHS: glucose ≥ 33.3 + effective osmolality > 320 + pH > 7.3, HCO₃⁻ > 18, no significant ketosis, Fluids: HHS has greater water deficit and needs larger volumes, Insulin: when glucose reaches [pending update](DKA)/[pending update] (HHS) switch to dextrose-containing fluid and reduce to 0.02–0.05） Inputs: Glucose 28 mmol/L, Arterial pH 7.15, HCO₃⁻ 12 mmol/L, Blood ketones ≥ 3 or urine ketones moderate-large No/weak, Effective plasma osmolality (optional) 330 mOsm/kg → Result: Assessment Does not meet typical DKA/HHS criteria — re-evaluate clinically（Diagnostic points: DKA: glucose > 13.9 + blood/urine ketones positive + pH < 7.3 or HCO₃⁻ < 18; HHS: glucose ≥ 33.3 + effective osmolality > 320 + pH > 7.3, HCO₃⁻ > 18, no significant ketosis, Fluids: HHS has greater water deficit and needs larger volumes, Insulin: when glucose reaches [pending update](DKA)/[pending update] (HHS) switch to dextrose-containing fluid and reduce to 0.02–0.05）