@explaining._science on Instagram: "A peripheral venous catheter (PVC) is a small plastic tube inserted into a vein in the hand or arm. It’s put in using a needle, but the needle is removed once the soft tube is inside. This tube acts like a channel, allowing doctors to give fluids, medicines, or blood directly into the bloodstream. The liquid flows in either by gravity (IV drip) or with a pump. PVCs are meant for short-term use (hours to a few days) and need monitoring to avoid swelling, vein i