Understanding Your Kidney Panel
A kidney panel is a blood test that measures markers tied to how the kidneys are working and how the body is handling waste products and minerals. On a lab report, common values include creatinine, BUN, eGFR, sodium, potassium, chloride, and CO2, each with a result, unit, and reference range. This guide explains how those numbers are organized, what the abbreviations mean, how units work, and why creatinine and eGFR are read as a pair.
A kidney panel is a blood test that groups several measurements into one lab report so the numbers are easier to read together. On a kidney panel report, common entries include creatinine, BUN, eGFR, sodium, potassium, chloride, and CO2, each shown with a result, unit, and reference range. Some reports may also include calcium, phosphorus, and albumin, depending on the lab or ordering panel. This guide explains how to read a kidney panel on a blood test, what each abbreviation stands for, and why eGFR is read alongside creatinine.
What's on a kidney panel blood test report
A kidney panel on a blood test is usually laid out in columns such as test name, result, unit, and reference range. Common abbreviations on a lab report include BUN, creatinine, eGFR, Na, K, Cl, and CO2. Some panels also list Ca, phosphorus, and albumin, which help show how the body is handling minerals and proteins. A result like creatinine 0.8 mg/dL may appear next to a reference range such as 0.6–1.3 mg/dL.
Understanding reference ranges on a kidney panel
A creatinine range might be 0.6–1.3 mg/dL, and potassium is often about 3.5–5.1 mmol/L. The exact numbers vary by lab, age, and method, based on how each lab sets its reference ranges. Values outside the range may carry a high or low flag.
Creatinine and BUN values explained
Creatinine and BUN are two of the most common numbers on a kidney panel blood test. Creatinine is often reported in mg/dL, with many adult reference ranges around 0.6–1.3 mg/dL, and BUN is often reported in mg/dL with a common range around 7–20 mg/dL. BUN stands for blood urea nitrogen, and it reflects a waste product measured in the blood. These two values are often read together because they help show how the body is clearing waste through the kidneys on the lab report.
What eGFR means on a kidney panel report
eGFR stands for estimated glomerular filtration rate, and it is a calculated number on a kidney panel blood test. Many labs report eGFR as mL/min/1.73 m2, with higher numbers generally showing more filtering activity. A report may list values such as 95, 72, or 58, and the lab may note whether the number is within the expected reference range or below it. Because eGFR is estimated from other values, it is best read alongside creatinine on the same lab report.
Sodium, potassium, chloride, and CO2 explained
Sodium, potassium, chloride, and CO2 are common electrolyte values on a kidney panel blood test. Sodium is usually reported as Na in mmol/L, potassium as K in mmol/L, chloride as Cl in mmol/L, and CO2 as mmol/L or mEq/L depending on the lab. Typical reference ranges are about Na 135–145 mmol/L, K 3.5–5.1 mmol/L, Cl 98–107 mmol/L, and CO2 22–29 mmol/L. These numbers help show the balance of minerals in the blood on the lab report.
How units work on a kidney panel report
Units matter because the same kind of measurement can be shown in different ways on a blood test. Creatinine and BUN are often in mg/dL, electrolytes such as sodium and potassium are often in mmol/L, and eGFR is usually in mL/min/1.73 m2. A percent sign does not usually appear often on a kidney panel, but some related reports may use it for calculated values or ratios. Reading the unit next to each number makes the result easier to compare with the reference range on the lab report.
Creatinine and eGFR from one report to the next
Creatinine moving from 0.9 to 1.1 mg/dL while eGFR drops from 92 to 78 can say more than either number alone. Some labs add arrows or color marks to show which way a value moved since your last report. To weigh a shift like that, see how much results vary from test to test. A different lab may list creatinine as 0.7–1.2 mg/dL instead of 0.6–1.3 mg/dL, one of the ways two lab reports can disagree.
Kidney Panel Reading Notes
- Check the unit first: mg/dL, mmol/L, and mL/min/1.73 m2 mean different things.
- Read creatinine and BUN together, not as isolated numbers on the lab report.
- eGFR is a calculated value, not a directly measured one.
- A flag usually means the result is outside that lab's reference range.
- Small changes between tests can be normal, especially if the same lab changed methods.
- Na, K, Cl, and CO2 are often listed together as electrolyte values.
- Reference ranges can vary by lab, age, and measurement method.
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Creatinine, BUN, eGFR and Other Kidney Values
Beta-2 Microglobulin
B2MB2M climbs when cells churn harder and when kidneys filter slower, and it can't tell you which on its own. That's why a high value gets re-read after kidney function recovers.
Microalbumin
The kidney test that goes high while the famous filtration numbers still look fine — and why a little albumin in urine is never supposed to be there at all.
Uric Acid
Uric acid is urate dissolved in your blood, and like sugar in iced tea it has a limit. Above it, crystals can drop out. But the number and the night in the ER are further apart than almost anyone expects.
Cystatin C
Cystatin C is the kidney test ordered when creatinine can't be trusted: the bodybuilder flagged abnormal, the slight older patient flagged fine. It reads the same kidneys from a completely different angle.
Creatinine Clearance
CrClCreatinine clearance is the one kidney test the patient performs: a full day of urine in a jug, paired with a blood draw. The collection is the test, and a single missed trip to the toilet quietly biases the answer.
Albumin-to-Creatinine Ratio
uACRDividing urine albumin by urine creatinine is what turns a random cup into a number guidelines can stage. The denominator has a cost: body size, a hard workout, and even yesterday's dinner can move the ratio with no change in the leak itself.
BUN-to-Creatinine Ratio
BUN/CrThe BUN-to-creatinine ratio is the spread between two waste numbers that rise together when kidneys slow. The gap doesn't measure how bad things are. It hints at why.
Kidney Panel — Common Questions
What does kidney panel stand for?
What does a flag mean on my blood test report?
Why do creatinine and eGFR change together between tests?
What does mg/dL mean on my report?
Do I need to fast for a kidney panel test?
What's the difference between a kidney panel and a basic metabolic panel?
Do I need to prepare for a kidney panel test?
What does eGFR mean on a kidney panel report?
Written by BloodSight Editorial Team · Last updated
Disclaimer
This content is for informational and educational purposes only. It is not intended as medical advice, diagnosis, or treatment recommendation. Reference ranges may vary by laboratory. Always discuss your results with a qualified healthcare professional.
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