- Confirm the diagnosis of DKA clinically (hyperglycemia, elevated anion gap, ketonemia/ketonuria, acidosis) — remember that euglycemic DKA (e.g. on SGLT2 inhibitors) can present with near-normal glucose, so keep the anion gap and ketones central.
- Enter weight (kg), serum glucose, and serum potassium (all required). The structured plan appears once these three are entered.
- Optionally add venous/arterial pH, serum bicarbonate, and serum sodium for corrected-Na guidance, severity flags, and resolution criteria.
- The tool returns weight-based fluid rates, the insulin infusion rate (and optional bolus), the matching potassium branch, and the resolution checklist. Every number is shown so the math is auditable.
Educational decision-support only — your institution's DKA protocol always governs. All computation runs in your browser; no values are stored or transmitted. In CKD/ESKD and heart failure, reduce fluids and titrate potassium with extra caution.
When to Use
Use this tool when caring for an adult with diagnosed or strongly suspected diabetic ketoacidosis to scaffold the three pillars of early management — fluids, insulin, and potassium — and to keep the resolution criteria in view. It converts the patient's weight and labs into the standard weight-based starting numbers and flags the correct potassium branch and any severity markers. It is a teaching and double-check aid, not an order set.
Appropriate population
Adults with confirmed or suspected DKA — including euglycemic DKA (e.g. SGLT2-inhibitor associated) where glucose may be near-normal but the anion-gap acidosis and ketosis are present. Most useful at the bedside when initial labs (glucose, potassium, venous/arterial gas, chemistry) are back and you are setting initial fluid, insulin, and potassium orders against your institutional DKA pathway.
When NOT to rely on it
This is an educational aid, not a protocol — your institution's DKA order set governs. The weight-based numbers assume an average adult without volume-sensitive comorbidity: in CKD/ESKD, dialysis dependence, and heart failure, reduce fluid volumes and titrate (or withhold) potassium with great caution, anticipating hyperkalemia and fluid intolerance — dialysis patients in particular need individualized, often markedly reduced, fluid and potassium. It does not cover pediatric DKA, hyperosmolar hyperglycemic state, pregnancy-specific dosing, or insulin-pump nuances. Always integrate with the full clinical picture and senior/specialist input.
Pearls & Pitfalls
Potassium before insulin — always
Insulin drives potassium intracellularly and can precipitate dangerous hypokalemia. Do not start the insulin infusion until serum K⁺ is ≥ 3.3 mEq/L. If K⁺ < 3.3, hold insulin and replace potassium (20–30 mEq/hr) until it recovers. This is the single most important safety rule in DKA and the tool flags it explicitly.
Add dextrose, keep the insulin running
When glucose falls below ~200–250 mg/dL, the goal is not to stop insulin — the anion gap and ketosis are what you are treating. Switch the fluids to contain 5% dextrose so you can continue the insulin infusion until the gap closes and DKA resolves. Aim for a glucose fall of ~50–75 mg/dL/hr.
Corrected sodium & fluid choice
Hyperglycemia dilutes measured sodium. Corrected Na = measured Na + 1.6 × ((glucose − 100)/100) (some use a 2.4 factor at very high glucose). Once volume is restored, choose 0.45% NaCl if corrected Na is normal or high and 0.9% NaCl if corrected Na is low. Replace potassium per the K⁺ branch within the maintenance fluids.
Pitfalls
(1) Avoid bicarbonate unless arterial pH < 6.9 — routine bicarbonate does not improve outcomes and may worsen hypokalemia and cerebral edema. (2) Watch for cerebral edema, especially in children/adolescents, with overly rapid correction. (3) Always identify and treat the precipitant (infection, missed insulin, MI, pancreatitis, new diabetes). (4) Euglycemic DKA can be missed if you anchor on glucose — track the anion gap and ketones. (5) In CKD/ESKD/heart failure the default weight-based fluid and potassium numbers can be harmful — individualize.
Why Use It
DKA management follows a few well-defined, evidence-based steps, but the early hour is busy and error-prone: clinicians must restore volume, start insulin at the right rate, replace potassium correctly, and avoid the classic traps (starting insulin with low potassium, stopping insulin too early, giving bicarbonate, missing the precipitant). This tool turns the patient's weight and labs into the standard ADA/AACE/JBDS starting numbers and surfaces the correct potassium branch and resolution criteria, so the plan can be assembled and double-checked quickly. It is an educational scaffold and cross-check — the institution's DKA protocol and the treating team's judgement remain in charge, with particular caution for CKD/ESKD, dialysis, and heart-failure patients whose fluid and potassium tolerance differ markedly.
DKA Management Protocol — Fluids, Insulin & Potassium
Enter weight, glucose, and potassium (all required) to generate a structured starting plan. Add pH, bicarbonate, and sodium for corrected-Na guidance, severity flags, and resolution criteria. Every weight-based number is shown so the math is auditable. Educational aid only — your institution's DKA protocol governs.
⚕ ADA / AACE / JBDS-aligned educational decision-support (Kitabchi 2009; ADA Standards of Care 2024; JBDS 2023). Weight-based starting numbers only — your institution's DKA protocol governs. Do NOT start insulin until K⁺ ≥ 3.3 mEq/L. In CKD/ESKD, dialysis, and heart failure, reduce fluids and titrate potassium with great caution. For licensed clinicians; not a substitute for individualized assessment.
Next Steps
Start the three pillars together, monitor closely, and re-check labs on a schedule.
- Fluids: begin 0.9% NaCl 15–20 mL/kg/hr (≈ 1–1.5 L in the first hour), then 250–500 mL/hr — switching to 0.45% NaCl if corrected Na is normal/high, 0.9% if low. Add 5% dextrose once glucose < 200–250 mg/dL and keep insulin running.
- Insulin: regular insulin IV infusion 0.1 U/kg/hr (an optional 0.1 U/kg bolus), or 0.14 U/kg/hr with no bolus. Target a glucose fall of 50–75 mg/dL/hr. Never start until K⁺ ≥ 3.3 mEq/L.
- Potassium: K⁺ < 3.3 → hold insulin, give 20–30 mEq/hr until ≥ 3.3; K⁺ 3.3–5.2 → add 20–30 mEq per litre of fluid; K⁺ > 5.2 → no potassium, recheck every 2 h.
- Monitor: glucose hourly; electrolytes, venous pH, and anion gap every 2–4 h. Identify and treat the precipitant. Avoid bicarbonate unless pH < 6.9. Watch for cerebral edema.
- Resolution: glucose < 200 mg/dL AND two of (HCO₃⁻ ≥ 15, venous pH > 7.3, anion gap ≤ 12). Transition to subcutaneous insulin with a 1–2 h overlap.
- Pair with the anion gap & acid–base tool to track gap closure, and insulin dosing in CKD when planning the subcutaneous transition.
Evidence & References
Weight-based formulas
| Quantity | Formula / target |
|---|---|
| Initial fluid rate | 0.9% NaCl 15–20 mL/kg/hr (≈ 1–1.5 L first hour) |
| Maintenance fluids | 250–500 mL/hr; 0.45% NaCl if corrected Na normal/high, 0.9% if low |
| Insulin infusion | Regular insulin 0.1 U/kg/hr (± 0.1 U/kg bolus) OR 0.14 U/kg/hr, no bolus |
| Glucose target | Fall 50–75 mg/dL/hr; add 5% dextrose when glucose < 200–250 mg/dL |
| Corrected Na | Measured Na + 1.6 × ((glucose − 100)/100) (some use 2.4) |
Potassium branch
| Serum K⁺ (mEq/L) | Action |
|---|---|
| < 3.3 | HOLD insulin; give 20–30 mEq/hr K⁺ until ≥ 3.3 |
| 3.3 – 5.2 | Add 20–30 mEq K⁺ per litre of IV fluid; start insulin |
| > 5.2 | No K⁺; recheck every 2 h |
Resolution criteria
| Criterion | Threshold |
|---|---|
| Glucose | < 200 mg/dL (required) |
| Plus two of | HCO₃⁻ ≥ 15 · venous pH > 7.3 · anion gap ≤ 12 |
| Transition | SC insulin with 1–2 h overlap |
Avoid bicarbonate unless arterial pH < 6.9. Identify and treat the precipitant; watch for cerebral edema (more common in children). Euglycemic DKA (e.g. SGLT2 inhibitors) may present with near-normal glucose — keep the anion gap and ketones central. In CKD/ESKD and heart failure, reduce fluids and titrate potassium with great caution.
References
- Kitabchi AE, Umpierrez GE, Miles JM, Fisher JN. Hyperglycemic crises in adult patients with diabetes (ADA consensus statement). Diabetes Care. 2009;32(7):1335–1343.
- ElSayed NA, Aleppo G, Aroda VR, et al. American Diabetes Association Standards of Care in Diabetes — 2024. Diabetes Care. 2024;47(Suppl 1).
- Joint British Diabetes Societies (JBDS) for Inpatient Care. The Management of Diabetic Ketoacidosis in Adults. 2023.
