The basic process of using a blood collection needle is usually to squeeze the blood collection site, disinfect the skin, puncture the skin and take blood, and finally press the cotton swab to stop the bleeding. Common blood collection site is the end of the finger, first of all, with the middle finger ring in the finger to be blood collection, squeeze the end of the finger congested with alcohol disinfection, open the cap of the blood collection needle, quickly and gently tied in the congested finger, remove the blood collection needle, you can see the blood out of the eye of the needle, the blood will be collected into the test tube, test paper or slides, the dry swabs pressed in the eye of the needle to stop the hemorrhage. Clinically, many operations require the use of blood collection needles, such as blood glucose measurement, blood type and so on, is a very common operation. Healthcare workers should be familiar with blood collection operations and pay attention to sterilization and hygiene during the operation to protect themselves and the person whose blood is collected.