Sodium concentration in dialysate fluid (measured by mass concentration)
This test measures the sodium level in the dialysate fluid used during hemodialysis, helping doctors monitor how well your body is balancing electrolytes during treatment.
["Your sodium levels in dialysis fluid are critical for preventing dangerous imbalances during treatment."]
Key facts at a glance
- LOINC
- 2949-6
- Short code
- Sodium Dial fld-sCnc
- Synonyms
- Sodium Dial fld-sCnc
- Category
- electrolyte
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 136
- Ref high
- 145
- Critical range
- 120 N/A – 160 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84295
- SNOMED
- 110741000
- 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 Is This Test Done?
Doctors may order this test if you’re on dialysis to ensure your sodium levels in the fluid used for dialysis are appropriate for your body’s needs. Sodium is essential for nerve and muscle function, and improper levels can cause complications like swelling, high blood pressure, or even seizures. The dialysate fluid’s sodium concentration is adjusted based on your blood sodium levels and overall health status.
What Does This Test Tell You?
The test checks the sodium concentration in the dialysate fluid, which is the solution used to clean your blood during dialysis. If the sodium level is too high or too low, it could indicate problems with fluid balance, kidney function, or how well your body is responding to dialysis.
What to Expect Before the Test
You won’t need any special preparation for this test. It’s typically done during your dialysis session, and the dialysate fluid sample is collected as part of the procedure. No additional steps or fasting are required.
What to Expect During the Test
This test is a routine part of your dialysis treatment. A sample of the dialysate fluid is taken and sent to a lab for analysis. The process is quick and painless, as it’s integrated into your dialysis session.
Reference range
Adult: 136-145 mmol/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
How does sodium concentration in dialysate fluid affect my health?
What if my sodium levels in dialysate fluid are abnormal?
Can diet or lifestyle changes affect this test?
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