D-Dimer Blood Clot (DVT) Test Kit — pack of 2
A CE-marked lateral flow test for the qualitative detection of D-dimer in whole blood or plasma, an aid in the diagnostic exclusion of deep vein thrombosis (DVT) and pulmonary embolism (PE). Read at 10 minutes; do not interpret after 20 minutes. This is a screening aid only, not a diagnostic test — a raised D-dimer has many possible causes and a normal result does not rule out other conditions. Sensitivity/specificity figures are documented in the manufacturer IFU on file — exact percentages to be transcribed carefully from source before publishing as a claim.
This is a screening test intended to support, not replace, professional medical advice. Please consult a doctor about your results.
What’s in the box
Everything you need is included — nothing else to buy.
- 2×Test cassette, individually foil-sealed
- 2×Dropper
- 1×Step-by-step instructions
- 1×Buffer
How you do it
No lab, no appointment, nothing to post. Most people finish the sample step in under two minutes.
- 1Bring everything to room temperature—
Let the cassette and specimen reach 15–30°C before testing.
- 2Add your sample1 min
Using the dropper, add one drop of whole blood (approx. 80 µl) to the specimen well, then add two drops of buffer (approx. 80 µl) and start the timer.
- 3Wait, then read the result10 min
Read the result at 10 minutes. Do not interpret the result after 20 minutes.
Questions people ask
What if the result is positive?
A positive screening result isn't a diagnosis — it means further testing is worthwhile. Take the result to a GP, who will arrange a confirmatory laboratory test. Screening tests are deliberately sensitive, so a positive result is a strong reason to get checked properly rather than a certainty either way. Finding out early almost always gives you more options, not fewer.
I'm nervous about testing at all. Is that normal?
Yes, and it's the most common reason people put testing off. It can help to know that a test only tells you something that is already true — it doesn't change your situation, it just gives you the chance to act on it. You can also test with someone you trust nearby, and you don't have to read the result alone.
What if I make a mistake doing the test?
The most common issue is not getting enough sample, which usually shows up as an invalid result with no control line. If that happens the test hasn't run correctly and the result shouldn't be interpreted — you'll need to order another test to get a valid result. Following the instructions in the pack carefully is the best way to avoid this.
Will the packaging show what I've ordered?
No. Everything is dispatched in plain outer packaging with nothing on the label indicating the contents. Your card statement shows only "Seradiag" and an order number, and our emails never name the tests you've bought.
Are these the same tests a clinic would use?
They are CE marked in-vitro diagnostic tests from established manufacturers, in many cases the same devices used in professional settings. The difference is usually the packaging and the instructions, which are written for self-testing rather than clinical use.
How accurate are the tests?
Accuracy figures are published on each product page, taken directly from the manufacturer's instructions for use. No rapid test is perfect: results can be affected by how and when the test is taken, and by individual biological factors. That is why every result — particularly an unexpected one — should be discussed with a healthcare professional.
Can I return a test if I change my mind?
Yes, if the seal is unbroken — within 14 days. Once a kit has been opened it can't be returned for hygiene reasons, which is a legal exception for sealed health products. Faulty, damaged or expired kits are always refunded, opened or not.
How quickly will it arrive?
Delivery options and timescales are shown at checkout. Orders placed before 2pm on a working day are dispatched the same day. If you need a result quickly, choose a faster delivery option at checkout.
Do I need to send anything to a laboratory?
No. These are self-contained rapid tests that you read yourself at home, usually within 5 to 15 minutes. Nothing is posted anywhere, and we never see or store your results.
Who are Seradiag?
Seradiag Ltd is a UK company (registered number 14428934) supplying CE marked diagnostic tests. If you have a question before ordering, email us — we would rather help you choose the right test than sell you the wrong one.