23
mEq/L
139
mEq/L
289.4
mOsm/kg
296.6
mOsm/kg
5
1
2
5.5
L
2
23
mEq/L
139
mEq/L
289.4
mOsm/kg
296.6
mOsm/kg
5
1
2
5.5
L
2
The Diabetic Ketoacidosis (DKA) Calculator assesses the severity of DKA and calculates key metabolic parameters including anion gap, corrected sodium, effective osmolality, and estimated fluid deficit. DKA is a life-threatening metabolic emergency that occurs primarily in type 1 diabetes (though increasingly recognized in type 2) and requires rapid recognition and aggressive treatment.
DKA results from a critical insulin deficiency that triggers a cascade of metabolic derangements: without insulin, cells cannot use glucose for energy, leading to hyperglycemia. The body instead breaks down fat, producing ketone bodies (acetoacetate, beta-hydroxybutyrate, acetone) as an alternative fuel. Excessive ketone production overwhelms the body's buffering capacity, causing a metabolic acidosis with an elevated anion gap. The resulting osmotic diuresis from hyperglycemia leads to severe dehydration, electrolyte losses (sodium, potassium, phosphate), and potentially life-threatening complications.
DKA is defined by the triad of: hyperglycemia (glucose >250 mg/dL), metabolic acidosis (pH <7.3, bicarbonate <18 mEq/L), and ketonemia/ketonuria. Severity is classified as mild (pH 7.25-7.30, bicarb 15-18), moderate (pH 7.0-7.24, bicarb 10-14), or severe (pH <7.0, bicarb <10). Mortality rates range from <1% in mild DKA to 5-10% in severe cases, particularly when complicated by cerebral edema (especially in pediatric patients).
The anion gap (Na − Cl − HCO₃) is elevated in DKA (typically >12) due to accumulation of ketoacid anions. Corrected sodium accounts for the dilutional effect of hyperglycemia on measured sodium — for every 100 mg/dL glucose above normal, measured sodium decreases by approximately 1.6 mEq/L. Effective osmolality (2×Na + Glucose/18) helps assess the degree of hyperosmolarity, which is important for distinguishing DKA from the Hyperosmolar Hyperglycemic State (HHS).
Treatment of DKA follows standardized protocols from the ADA and JBDS: aggressive IV fluid resuscitation (typically 1-1.5 L/hr initially), continuous IV insulin infusion (0.1 U/kg/hr), potassium replacement (critical — total body potassium is depleted even if serum K+ appears normal), and treatment of the underlying trigger (infection, insulin omission, new-onset diabetes). This calculator provides severity assessment and estimated fluid deficit to guide initial resuscitation planning.
The calculator computes the following parameters:
Anion Gap = Na⁺ − Cl⁻ − HCO₃⁻ (normal 8-12; elevated >12 in DKA)
Corrected Na⁺ = Measured Na⁺ + 1.6 × (Glucose − 100) / 100
Effective Osmolality = 2 × Na⁺ + Glucose / 18 + BUN / 2.8 (mOsm/kg)
DKA Severity: Mild (pH 7.25-7.30 or bicarb 15-18), Moderate (pH 7.0-7.24 or bicarb 10-14), Severe (pH <7.0 or bicarb <5)
DKA Criteria: Glucose >250 + pH <7.3 + Bicarb <18 + Anion Gap >12 + Ketones present
Estimated Fluid Deficit: Mild ~3.5L, Moderate ~5L, Severe ~7L (in 70kg adult)
Severity 0 (Not DKA): Metabolic parameters do not meet DKA criteria. Consider other causes of acidosis or hyperglycemia. Severity 1 (Mild): pH 7.25-7.30. Can often be managed on a regular ward with subcutaneous insulin protocol. Fluid deficit ~3-4 liters. Severity 2 (Moderate): pH 7.0-7.24. Requires ICU or high-dependency setting, IV insulin infusion, aggressive fluid replacement (~5L deficit), and frequent electrolyte monitoring. Severity 3 (Severe): pH <7.0 or bicarb <5. Medical emergency requiring ICU admission, continuous IV insulin, rapid fluid resuscitation (7L+ deficit), cardiac monitoring, and consideration of bicarbonate therapy if pH <6.9. The corrected sodium and osmolality guide fluid composition choices (0.9% vs 0.45% saline).
Inputs
Results
Glucose 350, pH 7.2, bicarb 12, AG 23 — moderate DKA. IV insulin, ~5L fluid deficit, ICU monitoring needed.
Inputs
Results
Glucose 600, pH 6.95, bicarb 4, AG 31 — severe DKA. Medical emergency: ICU, IV insulin, aggressive resuscitation, consider bicarbonate.
DKA is a serious metabolic emergency characterized by high blood sugar (>250 mg/dL), metabolic acidosis (pH <7.3, bicarb <18), and ketonemia. It occurs primarily in type 1 diabetes from absolute insulin deficiency, causing the body to break down fat into ketones as an alternative fuel source.
The most common triggers are: insulin omission or inadequate dosing (most common in known diabetics), new-onset type 1 diabetes (25-30% of DKA cases), infections (pneumonia, UTI, sepsis), myocardial infarction, stroke, surgery, medications (steroids, SGLT2 inhibitors), alcohol, and cocaine use.
The anion gap (AG = Na - Cl - HCO₃) represents unmeasured anions in the blood. Normal is 8-12. In DKA, it is elevated because ketoacids (beta-hydroxybutyrate, acetoacetate) are unmeasured anions that accumulate. An AG >12 with hyperglycemia and ketonemia strongly suggests DKA.
Hyperglycemia pulls water from cells into the bloodstream, diluting sodium. Measured sodium appears low but true sodium status may be normal or high. Corrected sodium (add 1.6 mEq/L per 100 mg/dL glucose above 100) reflects the true sodium status and guides fluid therapy.
Despite total body potassium depletion (200-500 mEq deficit), serum potassium may be normal or even elevated due to acidosis shifting K+ out of cells. As acidosis is corrected with insulin and fluids, K+ shifts back into cells, and levels can drop dangerously. Hypokalemia is the leading cause of death during DKA treatment.
Treatment pillars: 1) Aggressive IV fluids (0.9% saline, 1-1.5 L/hr initially), 2) Continuous IV insulin (0.1 U/kg/hr), 3) Potassium replacement (when K+ <5.3, add 20-40 mEq/L to IV fluids), 4) Bicarbonate only if pH <6.9, 5) Treat underlying trigger (antibiotics if infection). Switch to subcutaneous insulin when glucose <200, bicarb ≥15, pH >7.3, and patient eating.
DKA: glucose >250, pH <7.3, ketones present, osmolality variable. HHS (Hyperosmolar Hyperglycemic State): glucose often >600, pH >7.3, minimal ketones, osmolality >320. DKA is more common in type 1 and presents faster. HHS is more common in type 2 and has higher mortality (~15%).
Yes, increasingly recognized. 'Ketosis-prone type 2 diabetes' is common in African American, Hispanic, and Asian populations. SGLT2 inhibitor medications can also cause 'euglycemic DKA' where glucose may be only mildly elevated (<250 mg/dL) but acidosis and ketonemia are present.
With appropriate treatment, glucose typically normalizes within 6-12 hours. Anion gap closure and bicarbonate normalization take 12-24 hours. Most patients can transition from IV to subcutaneous insulin within 12-24 hours. Complete metabolic resolution usually occurs within 24-48 hours.
Early symptoms: excessive thirst, frequent urination, nausea, vomiting, abdominal pain, fruity breath odor (acetone), and fatigue. Progressive symptoms: rapid deep breathing (Kussmaul respirations), confusion, and drowsiness. Any diabetic with glucose >300, vomiting, or altered consciousness should seek emergency care immediately.
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