BUN and creatinine; renal function.
Blood collection at collection point
After your order you receive instructions by email
Make an appointment at a collection point near you
Blood collection at 1,000+ locations across the Netherlands
BUN stands for 'Blood Urea Nitrogen' and measures the amount of urea nitrogen in the blood. Urea nitrogen is a waste product created when proteins are broken down by the body. The kidneys filter this waste out of the blood, after which it leaves the body via urine. The BUN test, often performed together with a creatinine test, helps in assessing kidney function.
The BUN test is useful for evaluating kidney health, especially if there are symptoms suggesting kidney problems, such as fatigue, difficulty urinating, swollen hands and feet, or if you have a condition that may affect the kidneys. It is also used to monitor the effectiveness of dialysis treatment.
BUN values can provide information about how well your kidneys are functioning. Together with the creatinine value, the BUN test helps in diagnosing kidney diseases, assessing the severity of kidney conditions, and monitoring the progression of kidney disease or the effectiveness of treatment.
A high BUN level can indicate reduced kidney function, meaning the kidneys are not effectively filtering waste products. It can also point to other conditions, such as dehydration, recent heart attack, or high protein intake.
A low BUN level is less common and usually not concerning. It can occur with low protein intake, severe liver condition, or overhydration. In some cases, it may indicate reduced liver function.
Urea + Creatinine
This test is included in Dutch healthcare guidelines and is regularly used for its respective indications.
Rationale for this test
BUN (ureumstikstof) en creatinine zijn standaard-bepalingen voor het beoordelen van de nierfunctie binnen de Nederlandse reguliere geneeskunde. Deze testen zijn opgenomen in NHG-richtlijnen en multidisciplinaire richtlijnen voor chronische nierschade, en worden routinematig gebruikt voor diagnostiek en monitoring van nierfunctiestoornissen.
Dutch clinical guidelines and healthcare organisations
We recommend consulting these independent sources before ordering a preventive health check.
Brochure on preventive health checks: careful choice, reliability, pros and cons, checklist.
Independent information about preventive health checks from the National Institute for Public Health and the Environment.
Reliable patient information about illnesses and complaints from Dutch GPs (NHG).
Public-facing website of the Dutch Society for Clinical Chemistry with explanations of blood tests and laboratory values.
Answers to what people usually want to know.
After ordering we generate a referral letter and email you the instructions. You pick a collection point yourself and book an appointment there. Blood is drawn at the location, processed at the lab, and your result arrives digitally.
Often within a few working days. How soon you can be seen depends on how busy the location is and the type of analysis. For specialist analyses we first ship collection materials, which takes a bit longer.
At most collection points yes. Some accept walk-ins. This is clearly indicated per location. You choose the location that works best for you.
That depends on the test. Whether fasting is required, and from what time, is clearly stated in the instructions you receive after ordering. No surprises at the counter.
It varies per analysis: from same-day to a few working days. Standard values often come back quickly; analyses that go to an external lab can take a bit longer. You get an email with a link to your digital result, including a short explanation per value.
We work with 1,000+ collection points across the Netherlands. After ordering you'll see which locations near you are available and you pick where you'd like to go.
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