A teenager collapsed in the heat following a particularly strenuous football practice. Upon presentation to the emergency department, the patient complains of severe muscle pain and weakness. Rhabdomyolysis is suspected. Which of the following laboratory tests will confirm the diagnosis because it is the most sensitive and specific?

The nurse who suspects that the 19-year-old patient being treated for β-thalassemia major is experiencing complications of therapy advocates for which tests? Select all that apply.  

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?