Final answer:
Extravasation is the term used to describe medication or contrast leaking into the tissues surrounding the vein. This can occur during procedures such as chemotherapy and is different from infiltration, which is similar but involves non-vesicant medication.
Step-by-step explanation:
The content loaded Medication or contrast introduced into the tissues surrounding the vein is known as extravasation. Extravasation occurs when medication or contrast that is meant to be delivered into the vein instead leaks into the surrounding tissue. This can happen during procedures like chemotherapy, which is delivered directly into the bloodstream via a catheter in a vein. Extravasation is distinct from infiltration, which refers to the non-vesicant medication leaking into surrounding tissue, but it shares the same underlying mechanism of accidental leakage.
It is important to distinguish extravasation from other conditions such as vasculitis, which refers to an inflammation of the blood vessels, or lymphadenitis, which may result in the formation of a bubo due to inflammation of the lymph nodes.