How It Is Done continued...
Amylase can be measured in a 24-hour or
2-hour urine sample.
A 24-hour urine
sample is all of the urine you produce over a 24-hour period.
- 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
- 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 into a small, clean container and then pour the urine into the large
container. Do not touch the inside of the container with your
- Keep the large container in the refrigerator for the 24
- Empty your bladder for the final time at or just before the
end of the 24-hour period. Add this urine to the large container and record the
- Do not get toilet paper, pubic hair, stool (feces),
menstrual blood, or other foreign matter in the urine sample.
A 2-hour urine sample is all of
the urine you produce over a 2-hour period. Collect it in the same manner as
the 24-hour urine sample, during the 2-hour period your health professional
How It Feels
The blood sample is taken from a vein
in your arm. An elastic band is wrapped around your upper arm. It may feel
tight. You may feel nothing at all from the needle, or you may feel a quick
sting or pinch.
There is no pain while collecting a
2-hour or 24-hour urine sample.
There is very little chance of a
problem from having a blood sample taken from a vein.
- You may get a small bruise at the site. You
can lower the chance of bruising by keeping pressure on the site for several
- In rare cases, the vein may become swollen after the
blood sample is taken. This problem is called phlebitis. A warm compress can be
used several times a day to treat this.
- Ongoing bleeding can be a
problem for people with bleeding disorders. Aspirin, warfarin (Coumadin), and
other blood-thinning medicines can make bleeding more likely. If you have
bleeding or clotting problems, or if you take blood-thinning medicine, tell
your doctor before your blood sample is taken.
There are no risks associated with
collecting a 2-hour or 24-hour urine sample.