Diabetic Ketoacidosis Insulin and Potassium Management

Diagnose DKA when all three components are present: diabetes or hyperglycemia with glucose at least 200 mg/dL or known diabetes, ketosis with beta-hydroxybutyrate at least 3.0 mmol/L or urine ketones at least 2+, and metabolic acidosis with pH below 7.3, bicarbonate below 18 mmol/L, or both. Direct beta-hydroxybutyrate measurement is preferred for diagnosis and treatment monitoring; use urine ketones only when blood ketone testing is unavailable. ccjm+1ccjm[PDF] Hyperglycemic crises in adults: A look at the 2024 consensus reportPubMedDiabetic Ketoacidosis - Endotext - NCBI Bookshelf

At presentation, obtain plasma glucose, electrolytes, BUN, creatinine, measured osmolality, beta-hydroxybutyrate, venous or arterial pH, CBC with differential, urinalysis, phosphate, liver tests, and HbA1c when clinically useful. Add ECG for potassium-related conduction risk and use chest radiography, cultures, or head CT only when the presentation suggests infection, pulmonary disease, or a neurologic process. PubMedPubMedDiabetic Ketoacidosis - Endotext - NCBI Bookshelf

Separate isolated DKA from mixed DKA/HHS because hyperosmolality changes monitoring and insulin needs. Mixed DKA/HHS requires osmolality above 320 mOsm/kg, beta-hydroxybutyrate at least 3.0 mmol/L or ketonuria at least 2+, and pH below 7.30 or bicarbonate below 18 mmol/L; it has been reported in more than one-third of hyperglycemic crises and is managed with intravenous fluids plus fixed-rate insulin beginning at 0.1 units/kg/hour. PubMedPubMedDiabetic Ketoacidosis - Endotext - NCBI Bookshelf

Obtain serum potassium before initiating insulin. Start a continuous intravenous infusion of short-acting regular insulin only after potassium is above 3.5 mEq/L. If potassium is below 3.5 mEq/L, begin intravenous potassium replacement at 10 mEq/hour and delay insulin until potassium rises above 3.5 mEq/L. BMJ+1BMJDiabetic ketoacidosis - Management recommendationsBMJDiabetic ketoacidosis - BMJ Best Practice

If potassium falls below 3.5 mEq/L during treatment, stop insulin and replace potassium intravenously until the concentration is again above 3.5 mEq/L. This interruption is preferable to continuing insulin through clinically important hypokalemia. BMJBMJDiabetic ketoacidosis - Management recommendations

Use ECG as part of the initial evaluation when potassium disturbance is possible, especially with severe hyperkalemia, severe hypokalemia, renal dysfunction, or unexplained arrhythmia. Potassium administration requires controlled institutional preparation and infusion processes: manually adding potassium to intravenous fluids in general clinical areas has been identified as unsafe because accidental overdose can be fatal. PubMed+1PubMedDiabetic Ketoacidosis - Endotext - NCBI BookshelfBMJDiabetic ketoacidosis - Management recommendations | BMJ Best Practice

For severe DKA, begin regular insulin by fixed-rate intravenous infusion at 0.1 units/kg/hour once hypokalemia has been excluded, or use a validated nurse-driven variable-rate infusion protocol. Aim to maintain glucose around 200 mg/dL while insulin continues to clear ketones and reverse acidosis. BMJ+1BMJDiabetic ketoacidosis - BMJ Best Practiceccjm[PDF] Hyperglycemic crises in adults: A look at the 2024 consensus report

Avoid an initial insulin bolus in the pediatric protocol evidence base: after initial volume expansion, insulin was started approximately 1 to 2 hours after fluid replacement at 0.1 units/kg/hour, and a 0.1-unit/kg bolus was considered unnecessary and potentially associated with increased cerebral-edema risk. Diabetes JournalsDiabetes JournalsDiabetic Ketoacidosis in Infants, Children, and Adolescents In adults, use the infusion approach specified by the current institutional DKA protocol after confirming potassium safety. BMJ+1BMJDiabetic ketoacidosis - Management recommendationsBMJDiabetic ketoacidosis - BMJ Best Practice

Use low-dose insulin with gradual reduction of glucose and plasma osmolality to limit hypoglycemia and hypokalemia. Severe or complicated DKA requires intravenous therapy; rapid-acting subcutaneous analogs are not recommended in that setting. BMJ+1BMJDiabetic ketoacidosis - Management recommendationsBMJDiabetic ketoacidosis - Treatment algorithm | BMJ Best Practice US

Use plasma or capillary beta-hydroxybutyrate below 0.6 mmol/L plus either venous pH at least 7.3 or serum bicarbonate at least 18 mEq/L to define DKA resolution. This endpoint is preferred to anion gap alone because direct beta-hydroxybutyrate measurement tracks ketoacid clearance. BMJ+1BMJDiabetic ketoacidosis - Treatment algorithm | BMJ Best Practice USccjm[PDF] Hyperglycemic crises in adults: A look at the 2024 consensus report

Once DKA has resolved and the patient can take oral intake, establish a regular subcutaneous insulin regimen. In a patient with established diabetes, the prior regimen may be resumed when appropriate; newly diagnosed patients require a multidose regimen after resolution and oral fluid tolerance. BMJ+2BMJDiabetic ketoacidosis - Treatment algorithm | BMJ Best Practice USPubMedDiagnosis and treatment of diabetic ketoacidosis and the hyperglycemic hyperosmolar state - PMCDiabetes JournalsDiabetic Ketoacidosis in Infants, Children, and Adolescents

Administer subcutaneous insulin before terminating the intravenous infusion. Continue intravenous insulin for 30 to 60 minutes after the subcutaneous dose to prevent recurrent ketoacidosis, and consider daytime transition when feasible because staffing may be greater if deterioration occurs. BMJBMJDiabetic ketoacidosis - Management recommendations | BMJ Best Practice

The principal insulin-treatment complications are hypoglycemia and hypokalemia; hypoxemia and pulmonary edema can also occur during DKA management. Maintain frequent glucose and electrolyte reassessment rather than accelerating insulin solely to shorten apparent time to glucose correction. BMJBMJDiabetic ketoacidosis - BMJ Best Practice

Cerebral edema is rare but may be rapidly fatal. Avoid overly rapid fluid and electrolyte replacement, particularly when treating severe metabolic derangement or hyperosmolality. BMJBMJDiabetic ketoacidosis - BMJ Best Practice Pediatric evidence also supports avoiding an initial insulin bolus because it is unnecessary and may increase cerebral-edema risk. Diabetes JournalsDiabetes JournalsDiabetic Ketoacidosis in Infants, Children, and Adolescents

Persistent low bicarbonate after ketones have improved may reflect hyperchloremic acidosis, a recognized treatment complication. Use beta-hydroxybutyrate together with pH or bicarbonate-based resolution criteria rather than assuming every low bicarbonate value represents ongoing ketosis. Wiley+2WileyDiabetic ketoacidosis - Wolfsdorf - 2007 - Wiley Online LibraryBMJDiabetic ketoacidosis - Treatment algorithm | BMJ Best Practice USccjm[PDF] Hyperglycemic crises in adults: A look at the 2024 consensus report