Creatprtscnc
A test that measures creatinine levels in peritoneal fluid to assess kidney function and peritoneal dialysis effectiveness.
{"Measures creatinine in fluid from the abdominal cavity","Helps evaluate if peritoneal dialysis is working effectively","Used to assess kidney function in patients on peritoneal dialysis","Involves collecting a sample of peritoneal dialysis fluid","Results help doctors adjust dialysis treatment plans"}
Key facts at a glance
- LOINC
- 39474-2
- Short code
- CR_PER
- Synonyms
- Creat Prt-sCnc
- Category
- kidney
- Sample
- serum
- Container
- Sterile container without additives or red-top serum tube if simultaneous serum collection
- Units
- not specified
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 18 years
- Method
- Enzymatic method or Jaffe reaction (colorimetric)
- CPT
- 89058 (Peritoneal fluid analysis)
- SNOMED
- 398060004
- Specimen volume
- 1-2 mL of peritoneal fluid
- Stability
- Room temperature: 24 hours; Refrigerated (2-8°C): 7 days; Frozen (-20°C): 30 days
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 24–72 hours
- Order
- routine
What is this test?
The Peritoneal Fluid Creatinine test measures the amount of creatinine, a waste product, in the peritoneal fluid (the fluid in your abdominal cavity). This test is primarily used for patients undergoing peritoneal dialysis to evaluate how well the treatment is removing waste from the body.
Why is this test performed?
This test is performed to assess the effectiveness of peritoneal dialysis. By measuring creatinine levels in the peritoneal fluid, doctors can determine how much waste is being removed during dialysis sessions. It helps evaluate kidney function in patients with kidney failure who are on peritoneal dialysis treatment.
How is the test done?
A sample of peritoneal fluid is collected from the abdominal cavity, usually during a routine peritoneal dialysis exchange. The sample is then sent to a laboratory where the creatinine concentration is measured. The procedure is quick and typically does not cause significant discomfort.
What do the results mean?
Higher creatinine levels in the peritoneal fluid may indicate that waste products are accumulating, suggesting inadequate dialysis. Your doctor will compare these results with blood creatinine levels and other factors to determine if your dialysis treatment is effective or needs adjustment.
Reference range
No established reference range (typically approximates concurrent serum creatinine; interpret fluid/serum ratio)not specified
No special preparation or fasting required; specimen collected via paracentesis
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings2
Frequently asked questions
Is the test painful?
How often should this test be done?
What happens if my results are abnormal?
Do I need to fast before this test?
Sources
- 1
- 2
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