How It Is Done The health professional taking a sample of your
blood will: - Wrap an elastic band around your upper arm to stop
the flow of blood. This makes the veins below the band larger so
it is easier to put a needle into the vein. - Clean the needle
site with alcohol. - Put the needle into the vein. More than one
needle stick may be needed. - Attach a tube to the needle to
fill it with blood. - Remove the band from your arm when enough
blood is collected. - Put a gauze pad or cotton ball over the
needle site as the needle is removed. - Put pressure on the site
and then put on a bandage. - You start collecting your urine in
the morning. When you first get up, empty your bladder but do
not save this urine. Write down the time that you urinated to
mark the beginning of your 24-hour collection period. - For the
next 24 hours, collect all your urine. Your doctor or lab will
usually provide you with a large container that holds about 1
gal (4 L). The container has a small amount of preservative in
it. Urinate