HAMBURG, GERMANY – along with many other updates to the last statement on the topic, published 14 years ago.
Based on extensive literature reviews and observations of current trends, the new document – due to be published soon – will cover diagnosis and management of the two most serious acute hyperglycemic emergencies seen in adults, DKA and hyperosmolar hyperglycemic state (HHS).
New to the 2023 version will be a strong emphasis on the excess morbidity and mortality risks associated with the increasingly common “hybrid” presentation of the two conditions together, now seen in about a third of cases.
The new report will also more strongly urge clinicians to investigate why the person experienced the emergency.
While new-onset diabetes and infection are recognized precipitating causes for DKA, insulin omission related to finances, mental health, and social determinants should be identified, and patients directed to appropriate resources, said experts previewing the upcoming new report at the annual meeting of the European Association for the Study of Diabetes.
“The challenge is, although we were making progress for a long time in terms of those hyperglycemic crises, we’ve really plateaued and there are still people being admitted in large numbers, and when you look more globally even more so,” said American Diabetes Association Chief Science and Medical Officer Robert A. Gabbay, MD, PhD.
The new consensus report will be jointly endorsed by the ADA, the EASD, the American Association of Clinical Endocrinology, the Diabetes Technology Society, and the Joint British Diabetes Societies for Inpatient Care. The previous consensus statement on the subject was published in 2009 by the ADA alone.
New DKA and HHS definitions reflect emerging trends
The statement will revise the definition of DKA, partly spurred by the increasing occurrence and recognition of euglycemic ketoacidosis arising from the use of sodium-glucose cotransporter 2 (SGLT2) inhibitors. For all patients with hyperglycemic crisis, the hyperglycemia cutoff is now lowered to 200 mg/dL (11.1 mmol/L) from the previous 250 mg/dL.
However, the glucose cutoff has been removed entirely for people with a history of diabetes.
“Both of these changes are recognizing the wide range of glucose levels at the presence of DKA. Approximately 10% of DKA occurs with euglycemia or near-normoglycemia,” noted coauthor Shivani Misra, MD, PhD, senior clinical lecturer and honorary consultant in Metabolic Medicine at Imperial College, London.
For assessing ketosis in DKA, the new statement strongly recommends use of beta-hydroxybutyrate – either via point-of-care test or serum level measured in a laboratory – with a low cutoff of ≥ 3.0 mmol/L. Alternatively, a urine ketone strip value of 2+ or greater can be used.
However, beta-hydroxybutyrate testing is more widely available now than it was in 2009 and is strongly preferred over urine ketone measurement because it’s the predominant ketone during acidosis. Moreover, urine acetoacetate – measured by the strips – paradoxically increases during resolution of DKA, and drug interferences can occur with urine ketone measurement, Dr. Misra noted.
Metabolic acidosis is now defined as a pH < 7.3 and/or a bicarbonate concentration < 18 mmol/L, up from 15 in some prior guidelines including the United Kingdom’s. Also, anion gap has been removed from the main definition but, the document will say, can still be used in settings where ketone testing is unavailable.
As previously, the new statement will classify DKA by mild, moderate, and severe but now for the first time there are recommendations of care for each of those levels, as well as for HHS.
For HHS, the glucose cutoff of ≥ 600 mg/dL will stay the same. But now, the effective serum osmolality has been lowered from > 320 to > 300 mOsml/L to account for the effect of dehydration, along with an alternative criteria of total serum osmolality > 320 mOsm/L. The same two changes as with DKA for both ketones and acidosis have also been included for HHS.
Asked to comment, session audience member and independent diabetes industry consultant Charles Alexander, MD, told this news organization, “I liked the proposal to eliminate the anion gap in decision-making and to focus on measurement of blood ketones, principally beta-hydroxybutyrate, in the diagnosis of DKA and monitoring the effect of treatment.
“If someone is on an SGLT2 inhibitor, there is no need to look at blood glucose levels, which may be normal or near normal in the setting of DKA.”
But Dr. Alexander thinks that they should have eliminated glucose levels entirely as part of the DKA/HHS definition even for people without diabetes.
“The problem is that medical education for many years has taught us that DKA is a condition of high blood glucose, but it may not be. It is good that they said blood glucose levels were not important if the patient had a history of diabetes. However, a glucose of 200mg/dL may not be low enough if someone is on an SGLT2 inhibitor. There needs to be a much lower threshold for measuring blood ketones in anyone with nausea, vomiting, and abdominal pain, regardless of the blood glucose level.”