Verify the patient name, date of birth and reason for blood draw and check the labeling to ensure no mistakes are made. Mislabeling could lead to difficulty processing or even safety issues down the line. The inside of the elbow is generally the preferred location because the median cubital vein is usually easily visible.   The median cubital vein runs between the muscles and may be clearly visible as a blue bulge in the inside of your elbow. If it cannot be seen it can usually be felt. It is also relatively easy to access because the tissue around it prevents it from rolling away from the needle. Avoid drawing blood from a place where your veins divide or join together. Doing so increases risk of bleeding under the skin. A common disinfectant is 70 percent alcohol. Wipe an area that is at least two centimeters by two centimeters for at least a half a minute. After a minute or two it will have dried.  Alcohol is better than iodine because if the iodine gets into the blood it can alter values that the lab may be looking for. If you do use iodine, follow it with a 70% alcohol swab. Allow the disinfectant to dry before inserting the needle. Do not blow on or fan it with your hand as this will contaminate the area. Anchor the vein by pulling the skin below the vein taut. This will prevent the vein from rolling. Insert the needle in at a 15 to 30 degree angle and then hold it still while collecting blood. Fill the collection tube with blood, following the order of draw as specified by your laboratory. Release the tourniquet after 1 minute and before removing the needle. Leaving the tourniquet on for longer than a minute will affect the concentration of red blood cells, possibly altering the test. Withdrawing the needle while the tourniquet is still on will result in pain.
تأكد من بيانات المريض. حدد مكان الوريد. طهر المكان. اسحب العينة. اضغط على مكان السحب لخمس دقائق بعد إخراج الإبرة لكي يتوقف النزيف. تخلص من الإبرة في وعاء صلب الجدار مخصص للنفايات الطبية الخطرة. تأكد ثانية من الملصق على الأنبوبة لتجنب وقوع خطأ.