Quick Reference
- Full form
- BUN / Creatinine Ratio (Serum)
- Sample type
- Blood
- Fasting
- Not required
- Marker measured
- 1
- Report turnaround
- Next day
- Available at
- All locations
About BUN / Creatinine Ratio (Serum)
This ratio compares your BUN and creatinine levels to help your doctor distinguish between different causes of reduced kidney function, particularly whether dehydration is playing a role.
No fasting is required, and results are available the next day.
How to Prepare
- No fasting required.
- No special preparation needed before your blood draw.
Frequently Asked Questions
What does the BUN/Creatinine ratio tell my doctor?
It helps distinguish between different causes of reduced kidney function, particularly whether dehydration is a contributing factor.
Do I need to fast before this test?
No fasting is required.
Is this test done separately from BUN and creatinine?
No, it is calculated using your BUN and creatinine results from the same blood sample.
What does a high ratio suggest?
It can suggest dehydration or reduced blood flow to the kidneys, though your doctor will confirm based on your full picture.
How soon will my report be ready?
Next day.
Is home sample collection available?
Yes, in all City Care Lab service areas.
This page provides general health information and is not a substitute for medical advice. Speak with your doctor about your specific results and treatment.