This is a procedure that involves taking blood from a vein for various types of testing.
A blood draw, also known as venipuncture, is when blood is taken from a vein for various types of laboratory testing. Before drawing blood from your vein a tight band, called a tourniquet, will be placed on your arm. This is done to make your veins swell so it will be easier to find a good vein for blood drawing. After a good vein is found, a small needle will be inserted into the vein. Blood will flow from the needle into a small test tube that is airtight.
Blood may be taken from a vein to test for a variety of medical conditions and drug levels. In an adult, the blood sample is usually taken by placing a needle in a vein of the arm or back of the hand. If blood is taken from an infant, it is usually collected by pricking a finger or heel.
What should I ask my healthcare provider before having this test?
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