Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding . Cotton or a bandage may be applied to the puncture site if there is any continued bleeding. How The Test Will Feel When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing . How To Prepare For The Test Fasting for 10 to 12 hours before the test is usually standard.
Many drugs affect the level of alkaline phosphatase in the blood.
Usually children are not measured because of the potential for such high amounts, so the abnormal results refer to adults. It should not be relied on for a screening test because sometimes levels are high for unknown reasons and return to normal. Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others. The information provided herein should not be used for diagnosis or treatment of any medical condition.