Definitions:
- Diabetic ketoacidosis (DKA)1,2– uncontrolled hyperglycemia, metabolic acidosis, and increased total body ketones
- Hyperosmolar hyperglycemic state (HHS)1,2– severe hyperglycemia, hyperosmolality, and dehydration in the absence of significant ketoacidosis
DKA, Mild | DKA, Moderate | DKA, Severe | HHS | |
---|---|---|---|---|
Plasma Glucose (mg/dl) | >250 | >250 | >250 | >250 |
Serum Bicarb (mEq/L) | 15-18 | 10 to <15 | <10 | >18 |
Urine Ketones | Positive | Positive | Positive | Small |
Serum Ketones | Positive | Positive | Positive | Small |
Serum Osm. (mOsm/kg) | Variable | Variable | Variable | >320 |
Anion Gap | >10 | >12 | >12 | Variable |
Mental Status | Alert | Alert, Drowsy | Stupor, Coma | Stupor, Coma |
Treatment:
- Fluid resuscitation:1,2
- NS (0.9%NaCl) 15-20 ml/kg or 1-1.5 liters in first hour … THEN
- If corrected serum Na is low, cont. NS @ 250-500 ml/hr
- If corrected serum Na is high or normal, change to 0.45% NaCl @ 250-500 ml/hr
- Once plasma glucose reaches 200 mg/dl (DKA) or 300 mg/dl (HHS) change to 5%dextrose/0.45%NaCl @150-200 ml/hr
- Potassium:1,2,3 (Hold insulin until K+ level is known)
- Establish urine output 50 ml/hr
- K+ > 5.2 mEq/L – no replacement, recheck q2 hours
- K+ 3.3-5.2 mEq/L – give 20-30 mEq K+ in each liter of IVF to maintain serum K+ between 4-5 mEq/L. Consider oral replacement.
- K+ < 3.3 mEq/L – HOLD INSULIN and give 20-30 mEq K+ per hour until serum level > 3.3 mEq/L. Consider oral replacement.
- Insulin:
- Start Infusion (no bolus3,4) 0.1-0.14 units/Kg/hr1,2,3,4
- DKA1,2– when serum glucose is 200, maintain plasma glucose 150-200 until resolution of ketoacidosis
- Reduce insulin to 0.02-0.05 units/Kg/hr OR
- Change to rapid acting subcutaneous insulin 0.1U/Kg every 2 hours
- HHS1,2– when serum glucose is 300, maintain plasma glucose 200-300 until patient alert.
- Reduce insulin to 0.02-0.05 units/Kg/hr OR
-
Change to rapid acting subcutaneous insulin 0.1U/Kg every 2 hours
- Replete electrolytes:
- Magnesium level should be corrected in hypokalemic patients.
- Serum phosphate concentration <1.0 mg/dl may be repleated with 20–30 mEq/l potassium phosphate mixed with IVF. 1,2
Precipitating Factors:
- Most commonly infection1,2
- Inadequate insulin or discontinuation1,2
- Pancreatitis1,2
- MI1,2
- CVA1,2
- Drugs1,2
- corticosteroids
- thiazides
- sympathomimetic agents
- antipsychotics
- pentamidine
Mortality:
- DKA:1,2
- <1% Adults
- DKA is the most common cause of death in children and adolescents with type 1 diabetes and accounts for half of all deaths in diabetic patients younger than 24 years of age
- >5% has been reported in the elderly and in patients with concomitant life-threatening illnesses
- HHS: 5-20%1,2
Other Considerations:
- VBG is equivalent to ABG and adequate for use in DKA and HHS.7,8,9,10 However, ABG analysis rarely changes management in the ED. 8 (See VBG vs ABG)
- IV bicarbonate therapy does not show an improvement in patient oriented outcomes.5,6
- Insulin bolus increases risk of hypoglycemic event without improving patient oriented outcomes.3,4
- Measurement of Beta-hydroxybutyrate has been shown to be accurate for the diagnosis of DKA in adults and children. A level >3.8 mmol/L in adults or >3.0 mmol/L in children is diagnostic.11
Sources:
- Kitabchi AE, Umpierrez GE, Miles JM, Fisher JN. Hyperglycemic crisis in adult patients with diabetes. Diabetes Care. 2009;32(7):1339. PubMed , Open Access
- Westerberg DP. Diabetic ketoacidosis: evaluation and treatment. Am Fam Physician. 2013;87(5):337-46. PubMed , Open Access
- Arora S, Cheng D, Wyler B, Menchine M. Prevalence of hypokalemia in ED patients with diabetic ketoacidosis. Am J Emerg Med. 2012;30(3):481-4. PubMed
- Goyal N, Miller JB, Sankey SS, Mossallam U. Utility of initial bolus insulin in the treatment of diabetic ketoacidosis. J Emerg Med. 2010;38(4):422-7. PubMed
- Chua HR, Schneider A, Bellomo R. Bicarbonate in diabetic ketoacidosis – a systematic review. Ann Intensive Care. 2011;1(1):23. PubMed
- Duhon B, Attridge RL, Franco-martinez AC, Maxwell PR, Hughes DW. Intravenous sodium bicarbonate therapy in severely acidotic diabetic ketoacidosis. Ann Pharmacother. 2013;47(7-8):970-5. PubMed
- Kelly AM. Review article: Can venous blood gas analysis replace arterial in emergency medical care. Emerg Med Australas. 2010;22(6):493-8. PubMed
- Ma OJ, Rush MD, Godfrey MM, Gaddis G. Arterial blood gas results rarely influence emergency physician management of patients with suspected diabetic ketoacidosis. Acad Emerg Med. 2003;10(8):836-41. PubMed
- Bloom BM, Grundlingh J, Bestwick JP, Harris T. The role of venous blood gas in the emergency department: a systematic review and meta-analysis. Eur J Emerg Med. 2014;21(2):81-8. PubMed
- Menchine M, Probst MA, Agy C, Bach D, Arora S. Diagnostic accuracy of venous blood gas electrolytes for identifying diabetic ketoacidosis in the emergency department. Acad Emerg Med. 2011;18(10):1105-8. PubMed
- Sheikh-Ali M, Karon BS, Basu A, Kudva YC, Muller LA, Xu J, Schwenk WF, Miles JM. Can serum beta-hydroxybutyrate be used to diagnose diabetic ketoacidosis? Diabetes Care. 2008 Apr;31(4):643-7. PubMed
Further Reading:
- DKA Myths – Rebel EM Salim Rezaie
- Myths of DKA Management – EMDocs Anand Swaminathan
- DKA Myths – EM:RAP Anand Swaminathan
- Correction Of Critical Hypokalemia – EM Updates Reuben Strayer
- Bicarb in DKA – EMCrit Josh Farkas
- Sodium Bicard in DKA – Rebel EM Darrel Hughes
- Insulin Bolus in DKA – Rebel EM Darrel Hughes
- Blood Gas in DKA – EMCrit Josh Farkas
nice work sam