An Automated Algorithm for Determining Sleep Using Single-Channel Electroencephalography to Detect Delirium: A Prospective Observational Study in Intensive Care Units.

The relationship between polysomnography-based objective sleep and delirium in the intensive care unit (ICU) is inconsistent across studies, suggesting limitations in manually determining the sleep stage of critically ill patients. We objectively measured 24-h sleep using a single-channel electroencephalogram (SleepScope [SS]) and an under-mattress sleep monitor (Nemuri SCAN [NSCAN]), both of which have independent algorithms that automatically determine sleep and wakefulness. Eighteen patients (median age, 68 years) admitted to the ICU after valvular surgery or coronary artery bypass grafting were included, and their sleep time was measured one day after extubation. The median total sleep times (TSTs) measured by SS (TST-SS) and NSCAN were 548 (48−1050) and 1024 (462−1257) min, respectively. Two patients with delirium during the 24-h sleep measurement had very short TST-SS of 48 and 125 min, and the percentage of daytime sleep accounted for >80% in both SS and NSCAN. This preliminary case series showed marked sleep deprivation and increased rates of daytime sleeping in ICU patients with delirium. Although data accuracy from under-mattress sleep monitors is contentious, automated algorithmic sleep/wakefulness determination using a single-channel electroencephalogram may be useful in detecting delirium in ICU patients and could even be superior to polysomnography.

Life-Threatening Complications Related to Delayed Diagnosis of Euglycemic Diabetic Ketoacidosis Associated with Sodium-Glucose Cotransporter-2 Inhibitors: A Report of 2 Cases.

BACKGROUND Sodium-glucose cotransporter-2 inhibitors (SGLT2is) are widely used owing to their effective glycemic control and protective effects against heart and kidney failure. Euglycemic diabetic ketoacidosis (eu-DKA) is a complication of treatment with SGLT2is. Eu-DKA often leads to delayed diagnosis and results in life-threatening complications. We report 2 critical cases of SGLT2i-associated eu-DKA. CASE REPORT Case 1 was 52-year-old woman with unstable angina scheduled for elective coronary artery bypass grafting surgery. Preoperatively, she underwent tooth extraction which led to poor food intake because of pain. Three days before surgery, the patient had SGLT2i-associated eu-DKA and myocardial infraction, requiring percutaneous coronary intervention and peripheral venoarterial extracorporeal membrane oxygenation. The patient had taken SGLT2i until the morning of admission to the intensive care unit. Case 2 was a 76-year-old woman experiencing SGLT2i-associated eu-DKA and sinus arrest, necessitating a temporary pacemaker, followed by elective gastrojejunal bypass surgery. The SGLT2i was discontinued the day before surgery. On day 3 following surgery, the patient's metabolic acidosis improved, and sinus arrest resolved. CONCLUSIONS Precipitating factors of eu-DKA (caloric restriction and surgical stress) and delay in diagnosis because of a lack of evidence of hyperglycemia could contribute to the development and worsening of life-threatening complications. This reiterates the importance of reviewing ongoing medications of patients with diabetes and considering eu-DKA as a differential diagnosis for patients with high anion gap metabolic acidosis to ensure early intervention. SGLT2i-associated DKA likely develops perioperatively; therefore, clinicians should pay attention to the discontinuation period of SGLT2i before any surgical intervention.