EM@3AM: Diabetic Ketoacidosis

A 37-year-old female presents with dysuria, polyuria, polydipsia, and lightheadedness. She has a history of insulin-dependent diabetes but ran out of her glucose strips at home. She has had significant nausea and suprapubic pain. She is tachycardic and tachypneic. Exam reveals dry oral mucosa and suprapubic tenderness. POC glucose is 422 mg/dL. What is the diagnosis, and what are your next steps?