The nurse is caring for a patient with diabetes. Exhibits Complete the following sentence by choosing from the list of options. The client is at highest risk for developing dropdown as evidence by the client's dropdown.

Diabetic ketoacidosis (DKA): The client exhibits a history of type 1 diabetes, a markedly elevated blood glucose level (420 mg/dL), and a fruity odor on breath, which suggests ketosis. The clinical picture includes nausea, vomiting, and dehydration as evidenced by tachycardia (HR 122) and hypotension (BP 90/54), all classic for DKA. pH of 7.25 and HCO₃ of 15: The arterial blood gas shows a decreased pH and bicarbonate level, indicating a metabolic acidosis consistent with ketoacid accumulation. These ABG values confirm the acid-base disturbance diagnostic of DKA rather than other hyperglycemic states. Rationale for Incorrect Answers: Hypoglycemia: The patient’s hyperglycemia (glucose 420 mg/dL) is inconsistent with hypoglycemia, which involves low blood glucose and typically presents with altered consciousness, not the current findings. Acute kidney injury: BUN and creatinine are within or slightly above normal range (BUN 21 mg/dL, creatinine 0.77 mg/dL), insufficient to diagnose acute kidney injury in this patient. Hyperosmolar hyperglycemic state (HHS): HHS is characterized by severe hyperglycemia without ketosis or acidosis; however, this patient’s positive ketones and metabolic acidosis exclude HHS. Capillary blood glucose of 140 mg/dL: This value is a post-treatment reading and does not reflect the patient's initial presentation with severe hyperglycemia and metabolic derangement. Oxygen saturation of 98% on room air: Normal oxygen saturation is not relevant to the diagnosis or the acid-base status related to the patient’s diabetic crisis.