The nurse who is caring for a client with an infusion of D5…

The nurse who is caring for a client with an infusion of D5 1/2NS 1,000 mL with 20 mEq KCL at 100 mL/hr notes that there is some swelling at the insertion site and no blood return when aspirating at the injection port closest to the IV site. The skin around the IV looks pale. Which of the following problems does the nurse suspect?