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Review
. 2017 Jun 13:8:106.
doi: 10.3389/fendo.2017.00106. eCollection 2017.

Review of Evidence for Adult Diabetic Ketoacidosis Management Protocols

Tara T T Tran  1 , Anthony Pease  1 , Anna J Wood  1 , Jeffrey D Zajac  1   2 , Johan Mårtensson  3 , Rinaldo Bellomo  3 , Elif I I Ekinci  1   2   4
Affiliations
Review

Review of Evidence for Adult Diabetic Ketoacidosis Management Protocols

Tara T T Tran et al. Front Endocrinol (Lausanne). .

Erratum in

Abstract

Background: Diabetic ketoacidosis (DKA) is an endocrine emergency with associated risk of morbidity and mortality. Despite this, DKA management lacks strong evidence due to the absence of large randomised controlled trials (RCTs).

Objective: To review existing studies investigating inpatient DKA management in adults, focusing on intravenous (IV) fluids; insulin administration; potassium, bicarbonate, and phosphate replacement; and DKA management protocols and impact of DKA resolution rates on outcomes.

Methods: Ovid Medline searches were conducted with limits "all adult" and published between "1973 to current" applied. National consensus statements were also reviewed. Eligibility was determined by two reviewers' assessment of title, abstract, and availability.

Results: A total of 85 eligible articles published between 1973 and 2016 were reviewed. The salient findings were (i) Crystalloids are favoured over colloids though evidence is lacking. The preferred crystalloid and hydration rates remain contentious. (ii) IV infusion of regular human insulin is preferred over the subcutaneous route or rapid acting insulin analogues. Administering an initial IV insulin bolus before low-dose insulin infusions obviates the need for supplemental insulin. Consensus-statements recommend fixed weight-based over "sliding scale" insulin infusions although evidence is weak. (iii) Potassium replacement is imperative although no trials compare replacement rates. (iv) Bicarbonate replacement offers no benefit in DKA with pH > 6.9. In severe metabolic acidosis with pH < 6.9, there is lack of both data and consensus regarding bicarbonate administration. (v) There is no evidence that phosphate replacement offers outcome benefits. Guidelines consider replacement appropriate in patients with cardiac dysfunction, anaemia, respiratory depression, or phosphate levels <0.32 mmol/L. (vi) Upon resolution of DKA, subcutaneous insulin is recommended with IV insulin infusions ceased with an overlap of 1-2 h. (vii) DKA resolution rates are often used as end points in studies, despite a lack of evidence that rapid resolution improves outcome. (viii) Implementation of DKA protocols lacks strong evidence for adherence but may lead to improved clinical outcomes.

Conclusion: There are major deficiencies in evidence for optimal management of DKA. Current practice is guided by weak evidence and consensus opinion. All aspects of DKA management require RCTs to affirm or redirect management and formulate consensus evidence-based practice to improve patient outcomes.

Keywords: diabetes; diabetic ketoacidosis; hypoglycemia; hypokalemia; insulin; metabolic acidosis; protocol; rehydration.

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Figures

Figure 1
Figure 1
Pathogenesis of diabetic ketoacidosis.
Figure 2
Figure 2
Study selection flow diagram.
Figure 3
Figure 3
Protocol for management of diabetic ketoacidosis at our centre.
See this image and copyright information in PMC

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