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
24-hour urine sample.
There is very little chance of a
problem from having 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
There is no chance for problems while
collecting a 24-hour urine sample.
A chloride test measures the level of
chloride in your blood or urine. Chloride is one of the most important
electrolytes in the blood, along with sodium,
potassium, and calcium. Chloride helps keep the amount of fluid inside and
outside of your cells in balance.
The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what’s normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab. Blood chloride levels are checked more often than urine chloride levels.
Results are usually available in 1 to 2 days.
Chloride in urine1
mEq per 24 hours (140–250
mmol per day)
| Child (10–14 years):|
64–176 mEq/24 hours (64–176
|Child (younger than 6 years):|
15–40 mEq/24 hours (15–40
High chloride levels may be caused
Low chloride levels may be caused by:
- Conditions that cause too much water to build
up in the body, such as with syndrome of inappropriate antidiuretic hormone
- Addison's disease.
- A condition that raises the pH of the blood above the normal range (metabolic alkalosis).
- Heart failure.
- Ongoing vomiting.