Hepatitis B PCR (viral load)
HBV DNA · hepatitis B viral load · quantitative hepatitis B PCR · hep B PCR test
This blood test shows how much hepatitis B virus is in your blood right now.
If you have hepatitis B, to decide whether you need treatment and to follow it. Also in pregnancy for women with hepatitis B.
⏱ Duration: the blood draw takes a few minutes; results usually come in a few days
Be sure to tell your doctor
How to prepare
- Food. You usually do not need to fast strictly, but it is better to come 3 to 4 hours after a light, non-fatty meal. Check with the lab.
- Medicines. If you are on treatment, take your pills as scheduled. Do not stop or skip them on your own.
- Clothing. A sleeve you can easily roll up above the elbow.
What to bring
- Your referral or list of tests
- Your ID
- Past hepatitis B test results
- Liver ultrasound reports, if you have them
How it goes
- You sit down and rest your arm on the armrest
- A band is tied above your elbow, and you are asked to clench your fist a few times
- The skin is wiped with antiseptic
- A quick prick. Blood fills the tubes in a few seconds
- The needle comes out, and a cotton pad is pressed on the spot
What you'll feel
- A quick prick, like a pinch
- Sometimes slight dizziness. Tell the nurse, and they will help you lie down
Afterwards
- Press the cotton pad for 3 to 5 minutes
- It helps to compare with past results. The doctor looks at how it changes
- Your result is confidential. Only you or your doctor will get it.
Contact a doctor straight away if
- The puncture site is very swollen, painful, and red
Common questions
How often do I need this test?
Usually once or a few times a year, and more often during treatment. Your doctor will give you a schedule.
If the virus is not detected, can I stop my pills?
No. It means the treatment is working. Only your doctor can stop it.