Dialysis-related serum creatinine measurement (primary assessment)
This test measures the level of creatinine in your blood serum to assess kidney function and monitor how well your kidneys are filtering waste products, especially in patients on dialysis.
["This test helps track kidney health and adjust dialysis treatments based on waste removal efficiency."]
Key facts at a glance
- LOINC
- 68443-1
- Short code
- DIALYSISPRIMARY
- Synonyms
- —
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Matters for Dialysis Patients
Creatinine is a waste product produced when muscles break down proteins. Healthy kidneys filter it from your blood, but in dialysis patients, this process is managed externally. This test helps doctors determine how well your kidneys (or dialysis system) are removing waste, which is critical for preventing buildup that could harm your body.
How the Test Works
A small blood sample is taken to measure creatinine levels. The test uses a blood test method to detect the concentration of creatinine in your serum, which is then compared to standard reference values to assess kidney function.
What to Expect Before the Test
No special preparation is needed for this test. You may have a routine blood draw, often done during a routine clinic visit or at a lab. If you’re on dialysis, your blood may be drawn before or after your dialysis session, depending on your healthcare provider’s protocol.
Potential Results and Interpretation
Higher-than-expected creatinine levels may indicate that your kidneys aren’t filtering waste efficiently, which could mean your dialysis settings need adjustment. Lower-than-expected levels might suggest your kidneys are working better than expected, but this can also be influenced by factors like muscle mass or hydration status.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Regular monitoring of serum creatinine is essential for dialysis patients because it helps prevent complications like fluid overload, electrolyte imbalances, or cardiovascular strain. Elevated levels may signal that your dialysis is underperforming, while persistently low levels could warrant further investigation into muscle metabolism or hydration status. Your doctor will use these results to fine-tune your dialysis plan to keep you healthy.
Short name
Serum creatinine (dialysis monitoring)
Frequently asked questions
What does a high creatinine level mean in my dialysis results?
Can diet or hydration affect this test result?
How often should I have this test done?
Sources
- 1
- 2Lab Tests OnlineSource
- 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