RFRheumatoid factor (RF)
What it shows
An antibody that rises in some joint diseases; a rheumatologist reads it with other tests.
Your doctor reads the result: the laboratory does not diagnose or prescribe. The result sheet gives the reference range beside each value.
Sample
- Short code
- RF
- What is taken
- Blood from a vein
- Container
- Yellow-top gel serum tube
- Turnaround
- 1 working days for samples taken by 12:00; result at 18:00
- At home
- Yes, a nurse comes to your home
Preparation
- At least 4 hours after a light meal
Reference ranges
| For | Range |
|---|---|
| Everyone | below 14 IU/mL |
These ranges are for Damla’s analysers and methods; another laboratory’s ranges may differ slightly.
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