Which statement by the patient who has recently undergone a radical mastectomy indicates they understand teaching by the nurse?

The nurse receives report on a 76-year-old patient who is recovering from surgery for creation of an ileal pouch-anal anastomosis. The nurse plans care to prevent which complication that is most specific to this patient?

The patient walks into to the emergency department (ED) complaining of significant pain in the right eye. It appears red and swollen. The pupils are not equal in size or reactivity – the right pupil remains dilated despite the bright exam room and the flash light. The patient cringes from the bright light, though, and complains the bright lights are hurting his head. He reports that over the last week, both eyes have been aching and he has been seeing halos around lights. The nurse prepares for which test to be performed first?