Review common DKA severity criteria, anion gap, corrected sodium, osmolality, and related lab context in a single severity worksheet.
Diabetic ketoacidosis is usually recognized by a combination of hyperglycemia, anion-gap metabolic acidosis, and insulin deficiency. The lab pattern matters because the dangerous part is not the glucose value alone, but the broader metabolic picture: dehydration, potassium shifts, rising osmolality, and persistent ketosis.
This page is built as a worksheet for those lab relationships. It calculates the anion gap, corrected sodium, effective osmolality, and delta ratio, then places the result beside the common mild/moderate/severe ADA reference bands.
That distinction matters. In real DKA care, insulin, potassium, fluid, and transition decisions depend on repeat labs, hemodynamics, renal function, age, and the local emergency or ICU pathway. The useful role of a calculator here is to organize the arithmetic, not to replace that review.
DKA follow-up involves several linked calculations at once: anion gap, sodium correction, osmolality, and severity band. A worksheet helps keep those pieces aligned without pretending the calculator can replace repeat labs or a bedside pathway.
Anion Gap = Na⁺ − Cl⁻ − HCO₃⁻. Corrected Na⁺ = measured Na⁺ + 1.6 × (glucose − 100) / 100. Effective osmolality = 2 × Na⁺ + glucose/18 + BUN/2.8. Delta ratio = (AG − 12) / (24 − HCO₃⁻).
Result: DKA worksheet pattern present; moderate context with AG 22 and corrected Na 137.6
The anion gap is 22 (132 − 98 − 12), which is clearly elevated. Corrected sodium is about 137.6, showing that the measured sodium was diluted by hyperglycemia. With pH 7.15 and bicarbonate 12, the result falls into the moderate ADA severity band.
DKA reflects a broader metabolic crisis than a high glucose number alone. Insulin deficiency shifts the body toward lipolysis and ketone production, while osmotic diuresis drives major fluid and electrolyte losses. That is why patients can look profoundly depleted even when the initial potassium appears normal or high.
Measured sodium can be misleading in severe hyperglycemia because water shifts out of cells into the bloodstream. Corrected sodium helps estimate the true water-balance picture, while effective osmolality helps show how concentrated the extracellular compartment has become. Both are useful when thinking about how quickly values should change during treatment.
No single lab value tells the whole story in DKA. Glucose, bicarbonate, pH, anion gap, mental status, potassium, and osmolality all have to be read together, and the direction of repeat labs usually matters more than one isolated snapshot. The point of a worksheet is to organize that interpretation, not to replace the local treatment pathway.
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This worksheet calculates common DKA review values from entered labs: anion gap, corrected sodium, effective osmolality, and delta ratio. It then places the pattern beside common severity bands as a way to organize review.
The page is intentionally limited to worksheet-style interpretation. Repeat labs, bedside assessment, and local treatment pathways still determine what happens next.
The classic worksheet pattern is glucose above 250 mg/dL, bicarbonate below 18 mEq/L, and an elevated anion gap, together with ketone evidence and compatible symptoms. Real diagnosis still depends on bedside assessment and repeat labs.
Serum potassium can look normal or high even when total-body potassium is depleted. Once insulin and fluids start, potassium may fall quickly, so the potassium value is one of the most important numbers to follow alongside the gap and glucose trend.
Bicarbonate use in DKA is limited and highly pathway-specific. Many teams reserve separate review for very low pH values instead of treating bicarbonate as routine, so this page only flags the common threshold context rather than presenting a dosing order.
Severe hyperglycemia pulls water into the bloodstream and can make the sodium look lower than the underlying free-water picture really is. Corrected sodium helps interpret whether the apparent hyponatremia is largely dilutional.
They usually look for the gap to close, bicarbonate and pH to recover, glucose to come under control, and a safe transition plan before IV therapy is changed. This page intentionally leaves that workflow outside the calculator.
The delta ratio compares the rise in anion gap with the fall in bicarbonate. It can hint at whether the patient has a pure gap acidosis or whether another acid-base process may be present alongside DKA.