Alkaline phosphatase (ALP) test is used to measure the amount of the ALP enzyme in blood. Mostly, ALP enzyme is made in the liver and bone. Some amount is also made in the intestine, kidney and placenta of pregnant woman. Highest amount of ALP is made the liver. In some conditions, there may be large ALP amount in the blood. Such conditions are rapid bone growth, bone disease  or hyperparathyroidism or damaged liver cells. If ALP level is found high, then more number of tests are performed to find out reason behind it.

Your upper arm is wrapped with elastic belt to stop the blood flow. The veins below the band get bigger and make the needle easy to insert. The site of the needle insertion is cleaned with alcohol and the needle is put into the vein. Sometimes, more than one needle sticks are necessary.

The tube is attached to a needle to fill the blood in it. The band is removed from your arm when adequate blood amount is collected. The gauze pad or cotton ball is applied over the needle site after removing the needle. At first, pressure is applied to that site for some time and then bandage is wrapped over it.