• Justin W Yan, Tamara Spaic, and Selina Liu.
• Division of Emergency Medicine, Department of Medicine, London Health Sciences Centre, London, ON.
• Can J Emerg Med. 2020 Jan 1; 22 (1): 19-22.

AbstractA 21-year-old male with known type 1 diabetes mellitus presented to the emergency department (ED) with two days of vomiting, polyuria, and polydipsia after several days of viral upper respiratory tract infection symptoms. Since his symptom onset, his home capillary blood glucose readings have been higher than usual. On the day of presentation, his glucometer read "high," and he could not tolerate oral fluids. On examination, his pulse was 110 beats/minute, and his respiratory rate was 24 breaths/minute. He was afebrile, and the remaining vital signs were normal. Other than dry mucous membranes, his cardiopulmonary, abdominal, and neurologic exams were unremarkable. Venous blood gas demonstrated a pH of 7.25 mm Hg, pCO2 of 31 mm Hg, HCO3 of 13 mm Hg, anion gap of 18 mmol/L, and laboratory blood glucose of 40 mmol/L, as well as serum ketones measuring "large."

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