Hepatitis C Virus Tests
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
- Put the needle into the vein. More than one needle stick
may be needed.
- Attach a tube to the needle to fill it with
- Remove the band from your arm when enough blood is
- Put a gauze pad or cotton ball over the needle site as
the needle is removed.
- Put pressure on the needle site, and then
put on a bandage.
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
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 taken.
hepatitis C virus (HCV) test is a blood test that
looks for the genetic material (RNA) of the hepatitis C virus or for the proteins (antibodies) the body makes against HCV.
Results of hepatitis C virus testing that show no infection are called
negative. This means that no antibodies against HCV or HCV genetic material was
found. Results are usually available in 5 to 7 days.
Hepatitis C virus tests
No hepatitis C antibodies are found.
No hepatitis C genetic material (RNA) is
| Abnormal (positive):
Hepatitis C antibodies are found. A test to detect HCV RNA
is needed to determine whether the infection is current or occurred in the
past. If HCV RNA is found, genotyping can determine which strain of HCV is
causing the infection.
Hepatitis C RNA is detected. This
result means a current hepatitis C virus infection.
What Affects the Test
Many conditions can change HCV
antibody levels. Your doctor will talk with you about any abnormal results that
may be related to your symptoms and past health.
may need to be rechecked if you are taking some herbs, supplements, or other alternative medicine products.