SGLT2 Inhibitor Management and Ketone Monitoring in Critical Care: A Multi-Centre Point Prevalence Study

 

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SGLT2 Inhibitor Management and Ketone Monitoring in Critical Care: A Multi-Centre Point Prevalence Study

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Takaya
Sasaki
Takaya Sasaki h18ms-sasaki@jikei.ac.jp University of New South Wales The George Institute for Global Health Sydney Australia * The Jikei University School of Medicine Division of Nephrology and Hypertension, Department of Internal Medicine Tokyo Japan
Sharon Micallef smicallef@georgeinstitute.org.au University of New South Wales The George Institute for Global Health Sydney Australia -
Amanda Y Wang awang@georgeinstitute.org.au University of New South Wales The George Institute for Global Health Sydney Australia - Macquarie University Hospital Faculty of Medicine, Health and Human Sciences Sydney Australia University of Sydney Concord Clinical School Sydney Australia
Fatima Butt fbutt@georgeinstitute.org.au University of New South Wales The George Institute for Global Health Sydney Australia -
Naomi E Hammond nhammond@georgeinstitute.org.au University of New South Wales The George Institute for Global Health Sydney Australia - Royal North Shore Hospital Malcolm Fisher Department of Intensive Care Sydney Australia
Miranda Hardie mhardie@georgeinstitute.org.au University of New South Wales The George Institute for Global Health Sydney Australia -
Serena Knowles sknowles@georgeinstitute.org.au University of New South Wales The George Institute for Global Health Sydney Australia -
Takashi Yokoo tyokoo@jikei.ac.jp The Jikei University School of Medicine Division of Nephrology and Hypertension, Department of Internal Medicine Tokyo Japan -
Martin Gallagher martin.gallagher@unsw.edu.au University of New South Wales The George Institute for Global Health Sydney Australia - University of New South Wales South West Sydney Clinical Campus Sydney Australia
 
 
 
 
 
 

The use of sodium-glucose co-transporter-2 (SGLT2) inhibitors is growing due to their benefits in chronic kidney disease and heart failure. However, they carry a risk of euglycaemic diabetic ketoacidosis (EDKA), a serious complication. This risk is amplified in the Intensive Care Unit (ICU) setting by prevailing risk factors like fasting and sepsis. Current guidelines recommend temporary cessation of SGLT2 inhibitors in acutely unwell patients, but real-world data on their management and safety monitoring is limited. This bi-national point prevalence study aimed to examine SGLT2 inhibitor prevalence, discontinuation practices, and blood ketone testing in ICU patients.

This was a prospective, multicenter, cross-sectional point prevalence study conducted in ICUs across Australia and New Zealand, gathering data from critically ill adult patients on a single census day. Key data included patient illness severity (APACHE II score), SGLT2 inhibitor use, reasons for discontinuation, and documented unit policies for blood ketone measurement. Marked hyperketonemia was defined as a serum blood ketone level >3.0 mmol/L, meeting the criteria for ketoacidosis in this analysis.

This cohort included 786 patients with the mean age of 60.2±17.2 years. They were male predominant (60.0%) with a median APACHE II score of 17 (IQR: 12–22), highlighting the illness severity of the patient population. A total of, 54 (6.9%) patients were receiving an SGLT2 inhibitor at hospital admission, primarily for type 2 diabetes (75.9%) and heart failure (18.5%) (Figure 1). 

Figure 1. Proportion of patients receiving sodium-glucose co-transporter-2 (SGLT2) prior to hospital admission and reasons for prescription. (A) Use of SGLT2 inhibitors prior to hospital admission. (B) Reasons for SGLT2 inhibitor use prior to hospital admission among patients receiving the medication. Multiple responses for reason were allowed for (B). Abbreviations: CKD, chronic kidney disease; CVD, cardiovascular disease; T2, type 2.

SGLT2 inhibitors were discontinued in  28 patients (51.9 during their stay, with the main reasons cited being specific concerns about ketosis or ketoacidosis (six cases) or the general severity of the clinical condition. Regarding institutional practice, only 17 (32.7%) of participating ICUs reported having a documented blood ketone measurement policy, and most did not specifically list SGLT2 inhibitor use as an indication for monitoring. Blood ketone testing was performed in 115 patients (14.6%) across the cohort (Figure 2). Of those tested, 38 (33.0%) showed some degree of hyperketonemia (≥0.6 mmol/L), while six patients (5.2%) met the criteria for marked hyperketonemia (ketoacidosis criteria, >3.0 mmol/L).

This comprehensive point prevalence study found current SGLT2 inhibitor use in 7% of critically ICU inpatients. Clinical practice appeared to vary significantly, characterized by the frequent decision to discontinue the agents—often due to EDKA concerns—and a notable lack of standardized ketone monitoring policies. While ketosis is common in the ICU population, the absolute risk of severe ketoacidosis directly attributable to SGLT2 inhibitors remains unclear. Given the potential benefits of SGLT2 inhibitors, a more systematic and evidence-based approach to medication management and ketone measurement is needed. Further research is needed to clarify the risk-benefit profile of the use of these agents in ICU patients.

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