Creatdialfldmcnc
This test measures the amount of creatinine in dialysis fluid to evaluate how effectively dialysis is removing waste from your blood.
{"Creatinine is a waste product that kidneys normally filter out of blood","This test helps doctors assess if dialysis is working properly","Higher creatinine levels in dialysis fluid indicate better waste removal","The test is part of evaluating dialysis adequacy","Results help healthcare providers adjust your treatment if needed"}
Key facts at a glance
- LOINC
- 5919-6
- Short code
- CRTDial
- Synonyms
- Creat Dial fld-mCnc
- Category
- kidney
- Sample
- serum
- Container
- Standard collection container for dialysis effluent/fluid
- Units
- not specified
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Jaffe kinetic method or enzymatic method
- CPT
- 82575
- SNOMED
- 104687001
- Specimen volume
- 10-50 mL of dialysis fluid
- Stability
- Store at 2-8°C if analysis not performed within 24 hours; freeze at -20°C for longer storage
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 2–24 hours
- Order
- routine
What is this test?
The Dialysis Fluid Creatinine test measures the concentration of creatinine in the dialysis fluid (dialysate) used during hemodialysis. Creatinine is a waste product generated from muscle metabolism that healthy kidneys filter from the blood. When kidneys fail, creatinine builds up in the blood, and dialysis is used to remove it.
How is the test performed?
During your regular dialysis session, a sample of the dialysis fluid is collected before it enters the dialyzer (the filter) and/or after it leaves the dialyzer. The difference in creatinine concentration between these two samples helps doctors understand how much waste is being removed during treatment.
Why is it important?
This test is crucial for assessing dialysis adequacy. If the dialysis fluid shows low creatinine removal, it may indicate that the dialysis treatment is not effectively cleaning your blood. This could mean adjustments are needed in your treatment time, dialyzer type, or blood/dialysate flow rates.
What do the results mean?
Higher creatinine levels in the used dialysis fluid (compared to fresh fluid) indicate that more waste is being effectively removed from your blood. Your healthcare team will interpret these results along with other tests to determine if your dialysis prescription is appropriate for your needs.
Reference range
No established reference rangenot specified
No special patient preparation; sample collected as dialysis effluent during or after dwell
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings2
Frequently asked questions
Does this test require blood drawing?
How often should this test be done?
What can cause low creatinine clearance in dialysis fluid?
Is there anything I can do to improve my dialysis results?
What happens if my test shows inadequate dialysis?
Sources
- 1
- 2
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy