Cholesterol test

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Cholesterol producers

A total cholesterol test measures all the cholesterol in your blood.

Cholesterol is a soft, wax-like substance found in all parts of the body. Your body needs a little bit of cholesterol to work properly. But too much cholesterol can clog your arteries and lead to heart disease.

Some cholesterol is considered "good" and some is considered "bad." Different blood tests are needed to individually measure each type of cholesterol.

See also:

• HDL test (high density lipoprotein, or "good" cholesterol)
• High blood cholesterol and triglycerides
• LDL test (low density lipoprotein, or "bad" cholesterol)
• Lipid profile

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Total cholesterol test

Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.

Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.

Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.

In infants or young children, a sharp tool called a lancet may be used to puncture the skin and make it bleed. The blood collects into a small glass tube called a pipette, or onto a slide or test strip. A bandage may be placed over the area if there is any bleeding.

To get the most accurate results, you should not eat or drink anything for 9 - 12 hours before the test. You may drink water, but avoid other beverages, such as coffee, tea, or soda. For the purpose of screening, the total cholesterol is often done without fasting overnight.

Your health care provider may tell you to stop taking drugs that can affect the test. Never stop taking any medicine without first talking to your doctor.