A patient showing signs of extravasation might exhibit which of the following symptoms?

Extravasation refers to the leakage of a substance, typically a medication or fluid, from a blood vessel into the surrounding tissue. When this occurs, it can cause localized symptoms as the fluid accumulates in the tissue, leading to swelling and discoloration. Swelling occurs due to fluid build-up, while discoloration may result from blood or other substances leaking into the tissue, causing areas to appear red, purple, or bruised. These visual indicators are key signs that a patient might be experiencing extravasation.

In contrast, excessive bleeding from a cut is usually associated with trauma rather than extravasation. Low blood pressure and increased heart rate are systemic responses that may be related to other medical conditions or significant vascular changes but are not direct indicators of extravasation in the localized area of leakage. Thus, the symptoms of swelling and discoloration are the most pertinent to recognize in the context of extravasation.