Pre-dialysis fluid balance measurement (total fluid removed or infused at the start of a reporting period)
This test measures the volume of fluid removed or added during dialysis at the beginning of your treatment session. It helps track how much fluid your body has retained or lost.
This test helps monitor fluid balance during dialysis to ensure proper hydration levels.
Key facts at a glance
- LOINC
- 64327-0
- Short code
- TOTALDIALYSISPATIENTSATBEGINNINGOFREPORTINGPERIOD
- 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
What This Test Measures
This test evaluates the total fluid volume removed or infused at the start of your dialysis session. It is recorded as a quantitative measurement of fluid balance (in liters or milliliters) based on your dialysis machine’s calculations. It reflects the amount of fluid removed from your body or added back during the initial phase of treatment.
Why It Matters in Dialysis
Fluid balance is critical for people on dialysis. Too much fluid can cause swelling, high blood pressure, or heart strain, while too little can lead to dehydration. This measurement helps your healthcare team adjust your dialysis settings to maintain safe and effective fluid removal.
How It’s Performed
This is not a traditional blood or urine test. Instead, it is a calculated value derived from your dialysis machine’s data during the first few minutes of treatment. Your healthcare provider will record the total fluid removed or infused at that exact moment.
What to Expect Before or After
You won’t need to prepare for this specific measurement. It’s part of your routine dialysis session and doesn’t require any special actions before or after. Your dialysis team will document it as part of your care plan.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This measurement is vital for tailoring your dialysis treatment to your specific needs. It helps prevent complications like fluid overload (which can cause swelling, shortness of breath, or high blood pressure) or dehydration (which can lead to fatigue, dizziness, or low blood pressure). By monitoring this value, your healthcare team can adjust your dialysis settings to keep your fluid balance stable and comfortable.
Frequently asked questions
How often is this test performed?
What does a low or high value mean?
Can I ask my doctor about this test result?
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