Final answer:
The recommended prevention/intervention for hematoma as a complication of IV therapy is option B: Elevate the extremity.
Step-by-step explanation:
Elevating the extremity is a crucial step in preventing and managing hematoma formation during IV therapy. When the extremity is elevated, the force of gravity assists in reducing blood pooling at the injection site, minimizing the risk of hematoma formation. This action promotes optimal venous return and reduces the pressure at the puncture site.
Hematomas occur when blood leaks from the punctured blood vessels into the surrounding tissues, leading to localized swelling and pain. Elevating the extremity above the level of the heart helps counteract the effect of gravity, preventing excessive blood accumulation.