Rheumatoid Factor (RF) for suspected rheumatoid arthritis.
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
Rheumatoid factor is a biomarker that may be present in the blood of people with rheumatic diseases, such as rheumatoid arthritis. It is essentially a group of antibodies directed against the body's own immune system, which is typical of autoimmune diseases.
Testing for Rheumatoid Factor is useful for diagnosing rheumatoid arthritis and other rheumatic conditions. It aids in determining the presence and severity of the disease, especially in individuals experiencing symptoms such as joint pain, stiffness, and swelling.
A positive Rheumatoid Factor test indicates the presence of the specific antibodies in the blood. This may suggest rheumatoid arthritis or other autoimmune diseases. However, it is important to note that some people with a positive test have no symptoms and that not everyone with symptoms tests positive.
A high level of Rheumatoid Factor in the blood may indicate an active autoimmune reaction, such as in rheumatoid arthritis. It can also be associated with a more severe course of the disease and a greater chance of joint damage.
A low or undetectable level of Rheumatoid Factor may suggest the absence of rheumatoid arthritis or other autoimmune diseases. However, it is possible to have rheumatoid arthritis without detectable levels of Rheumatoid Factor, known as seronegative rheumatoid arthritis.
Rheumatoid Factor (quantitative) with code RFLG and Rheumatoid Factor IgM (RFLGG)
This test is included in Dutch healthcare guidelines and is regularly used for its respective indications.
Rationale for this test
Reumafactor is een standaard-bepaling in de Nederlandse reumatologie voor de diagnostiek van reumatoïde artritis. De test is opgenomen in de richtlijnen van de Nederlandse Vereniging voor Klinische Chemie en wordt gebruikt in combinatie met anti-CCP antistoffen bij klinische verdenking op RA. De klinische betekenis en diagnostische waarde zijn goed onderbouwd.
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.
Didn't find what you're looking for? Request a custom test
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Klantenservice was erg behulpzaam in het beantwoorden van mijn vragen. Ik had ook een extra setje buizen nodig als back-up en dat was geen probleem. Ik had een groot test panel besteld, maar de resultaten waren binnen 1 week binnen. Rapport zag er netjes uit.
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Je hebt de spullen snel in huis en het is duidelijk wat je daarna moet doen. Ook de uitslag heb je snel in huis, ik dezelfde avond al de eerste uitslagen. Bij een bepaling ging het fout, niet eens door het bedrijf maar door het bloedafname punt en die bepaling kreeg ik gewoon vergoed, ook het geld terug stond erg snel op mijn rekening. Vragen worden ook snel beantwoord dus al met al een positieve ervaring bij Bloedcheckup.nl
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My experience was very positive. I needed to pass several very specific tests. They provide 24/7 customer support. They were friendly and prompt.
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Snelle en makkelijke afhandeling. Duidelijke instructies en binnen anderhalve dag al resultaat binnen. Top service!
“Amazing service!”
Received a packet with everything needed, went to a walk in clinic (Amsterdam DC Clinic) where my blood was drawn and I was out the door within 5 minutes, and then after posting the samples, received results 2 days later. Results were easy to understand as well. Amazing service, would highly recommend!