During a clinical rotation on an orthopedic unit, a nursing student is caring for a 67-year-old patient who has undergone a knee replacement. The patient is complaining of pain at the IV site. The nursing student assesses the site and finds that the site is cool, blanched and slightly swollen. The student stops the IV and reports the situation to the nurse. What does the nursing student suspect?

A. Infiltration occurs when IV fluid or medication leaks into the surrounding tissues rather than entering the vein. Coolness, blanching (pale appearance), swelling, and discomfort at the IV site are common signs of infiltration.

B. Local inflammation at the IV site can occur due to irritation or infection. Redness, warmth, swelling, tenderness, and possibly purulent drainage (pus) are typical signs. The description of a cool and blanched IV site does not fit the typical signs of inflammation, which usually involve warmth and redness.

C. Thrombophlebitis is inflammation of a vein with associated blood clot formation. Pain, warmth, redness, and swelling along the path of the vein are common. Thrombophlebitis typically presents with warmth and redness at the site, whereas the cool and blanched appearance described by the student suggests fluid infiltration rather than a thrombus causing inflammation.

D. Phlebitis is inflammation of the vein itself. Pain, redness, warmth, and swelling directly over the vein. Phlebitis usually manifests with warmth and redness, which are not present in the described symptoms.