Erythrocyte sedimentation rate
Also written: ESR / VS
What it measures
How fast red cells settle in a tube of blood left standing.
Why it is ordered
A general marker that some inflammatory process is present. Very non-specific — it says something is happening, not what.
How to prepare
Usually no fasting needed.
Units
mm/giờ — convert here
What to ask
- What does this change in my plan
- Should it be followed as a series rather than one value
- Is there a more specific test for my situation
This page does not include reference ranges and does not say whether your number is high or low. Reference ranges differ between laboratories and between people — read yours on your own report, with your clinician.