Blood-sampling is a medical procedure that involves drawing blood from a patient's body, usually from a vein in the arm, for the purpose of testing. The collected blood samples are analysed in a lab to help doctors diagnose diseases, assess the function of organs such as the liver and kidneys, determine the presence of substances or chemicals, or monitor the effectiveness of certain treatments. This procedure is usually performed by trained medical professionals called phlebotomists. The process begins with cleaning the skin area, then a small needle attached to a tube is gently pushed into a vein. Some discomfort or mild pain might be felt during the process, and a small bruise may appear at the site afterwards. This is generally harmless and disappears within a few days. Despite its routine nature, potential complications can occur including fainting, excessive bleeding, or infection at the puncture site.
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