Background: Perioperative diabetic ketoacidosis (DKA) with near-normal blood glucose concentrations, termed euglycaemic ketoacidosis (EDKA), is an adverse effect associated with sodium-glucose co-transporter-2 inhibitors (SGLT2i). Guidelines are still evolving concerning the perioperative management of patients on SGLT2i. We performed a systematic review of published reports of DKA from SGLT2i in the surgical setting to understand better the clinical presentation and characteristics of SGLT2i-associated DKA. Methods: We searched PubMed, Embase, and ProQuest for reports of perioperative DKA involving SGLT2i up to January 2019. Results: Forty-two reports of EDKA and five cases of hyperglycaemic diabetic ketoacidosis (HDKA) were identified from 33 publications. Canagliflozin was implicated in 26 cases. Presentation time varied from a few hours up to 6 weeks after operation. Precipitating factors may include diabetes medication changes, diet modifications, and intercurrent illnesses. There were 13 cases (12 EDKA and one HDKA) of bariatric surgery, 10 of them noted very-low-calorie diet regimes as a precipitating factor. No precise association between interruption of SGLT2i and the occurrence of DKA could be identified. Seven patients required mechanical ventilation, and acute kidney injury was noted in five. Five cases needed imaging to rule out anastomotic leak and pulmonary embolism, all of them revealed negative findings. Outcome data were available in 32 cases, all of them recovered completely. Conclusions: EDKA is likely to be under-recognised because of its atypical presentation and may delay the diagnosis. Understanding this clinical entity, vigilance towards monitoring plasma/capillary ketones helps in early identification and assists in the management.

Hip fracture surgery is common, usually occurs in elderly patients who have multiple comorbidities, and is associated with high morbidity and mortality. Pre-operative focused cardiac ultrasound can alter diagnosis and management, but its impact on outcome remains uncertain. This pilot study assessed feasibility and group separation for a proposed large randomised clinical trial of the impact of pre-operative focused cardiac ultrasound on patient outcome after hip fracture surgery. Adult patients requiring hip fracture surgery in four teaching hospitals in Australia were randomly allocated to receive focused cardiac ultrasound before surgery or not. The primary composite outcome was any death, acute kidney injury, non-fatal myocardial infarction, cerebrovascular accident, pulmonary embolism or cardiopulmonary arrest within 30 days of surgery. Of the 175 patients screened, 100 were included as trial participants (screening:recruitment ratio 1.7:1), 49 in the ultrasound group and 51 as controls. There was one protocol failure among those recruited. The primary composite outcome occurred in seven of the ultrasound group patients and 12 of the control group patients (relative group separation 39%). Death, acute kidney injury and cerebrovascular accident were recorded, but no cases of myocardial infarction, pulmonary embolism or cardiopulmonary arrest ocurred. Focused cardiac ultrasound altered the management of 17 participants, suggesting an effect mechanism. This pilot study demonstrated that enrolment and the protocol are feasible, that the primary composite outcome is appropriate, and that there is a treatment effect favouring focused cardiac ultrasound - and therefore supports a large randomised clinical trial.

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