The nurse is caring for a client who had surgery 1 day ago and is receiving a continuous infusion of fentanyl through an epidural catheter. Which intervention should the nurse perform first?

A. Assess for signs of urine retention: While important, urinary retention is a later complication. It does not take priority over assessing for potentially serious effects like respiratory depression or excessive spread of anesthesia. B. Inspect epidural catheter insertion site: Inspecting the site helps identify infection or dislodgement but is not the first priority. Neurological and respiratory assessments take precedence due to fentanyl’s CNS effects. C. Monitor the client's dermatome level for sensation: This assesses the spread of the anesthetic, ensuring it hasn’t ascended to high thoracic levels, which could depress respiration. It’s the most urgent check for client safety. D. Inquire if the client is experiencing breakthrough pain: Pain assessment is critical, but ensuring safe levels of sensory block must come first to rule out excessive anesthetic spread or complications.