Brain Natriuretic Peptide (BNP) Test
How It Feels
You may feel nothing at all from the
needle puncture, or you may feel a brief sting or pinch as the needle goes
through the skin. Some people feel a stinging pain while the needle is in the
vein. But many people do not feel any pain (or have only minor discomfort) once
the needle is positioned in the vein. The amount of pain you feel depends on
the skill of the health professional drawing the blood, the condition of your
veins, and your sensitivity to pain.
There is very little risk of complications from
having blood drawn from a vein.
- You may develop a small bruise at the puncture
site. You can reduce the risk of bruising by keeping pressure on the site for
several minutes after the needle is withdrawn.
- In rare cases, the
vein may become inflamed after the blood sample is taken. This condition is
called phlebitis and is usually treated with a warm compress applied several
- Continued bleeding can be a problem for people with
bleeding disorders. Aspirin, warfarin (Coumadin), and other blood-thinning
medicines can also make bleeding more likely. If you have bleeding or clotting
problems, or if you take blood-thinning medicines, tell your health
professional before your blood is drawn.
A brain natriuretic peptide (BNP) test
measures the amount of the BNP
hormone in the blood. BNP values tend to
increase with age and are higher in women than men.
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.
Brain natriuretic peptide
0–99 picograms per milliliter (pg/mL) or 0–99
nanograms per liter (ng/L)