A client hаs а serum pоtаssium level оf 6.0 mEq/L. The client’s blоod pressure is 94/58 mm Hg and heart rate is 112/min. Cardiac monitoring shows a new ventricular dysrhythmia. The client reports a pain rating of 6/10 and is a very difficult IV stick. After several unsuccessful attempts, the nurse successfully inserts an IV catheter into the client’s forearm near the wrist. The provider prescribes IV regular insulin with dextrose to rapidly lower the serum potassium level. One hour after the infusion begins, the nurse notes swelling around the IV site. The forearm is cool to the touch, and the client reports mild discomfort at the site. What is the nurse’s priority action?