The patient has hyperlactatemia. Which lab value concerns the nurse the most about the patient’s risk for long-term sequelae?

The nurse is supervising the student nurse in performing a cap change for a peripherally inserted central catheter (PICC) in a patient who recently sustained a traumatic brain injury. Which action by the student nurse best indicates effective learning?

A 13-year-old patient presents to the emergency department in a disoriented state with tachycardia, tachypnea, hypotension, and hypothermia. Upon assessment, the nurse notes the patient’s breath smells like acetone, the mucous membranes are dry, and the patient has poor skin turgor. The nurse knows which test is the priority?