Clotting Blood Test
    Clotting Blood Test
    Clotting Blood Test
    Clotting Blood Test

Clotting Blood Test

£59
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Do you take warfarin or another anticoagulant? Monitor your condition, clotting disorders, and bleeding problems from home with our Clotting Blood Test.

You'll need to visit The Doctors Laboratory in London to collect your sample as the sample is not suitable for posting.

  • Results estimated in 3 working days
  • Convenient testing options
  • Bespoke doctor’s report
  • Free delivery

Including INR, fibrinogen, prothrombin time (PT), and activated partial thromboplastin time (APTT).

How do you want to take your sample?

  • Book a venous draw at a clinic   Venous
    +£35

    Visit one of our national clinic partners for a nurse to take your venous blood sample from a vein in your arm. We’ll email you instructions on how to book after we’ve processed your order.

18+ Only. T&Cs apply.

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Your health, expertly explained

Go beyond the numbers

Get ready to elevate your health understanding with a personalised doctor's report. Go beyond results and tap into expert insights tailored just for you.

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Blood testing made easy

How it works

You have the flexibility to choose what works best for you. Enjoy the comfort of having a friendly nurse visit your home for a quick blood draw, opt for a convenient visit to one of our nationwide partner clinics, or self-arrange a draw at a location that suits you.

Take control of your health with Medichecks – order your blood test today!

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MyMedichecks is your personal online dashboard where you can view your results, access clear and simple explanations about individual health markers, monitor changes in your health, and securely store information about your medical history, lifestyle and vital statistics.

Supported by a team of specialist and qualified doctors

  • Dr Natasha Fernando
    Medical Director

  • Dr Tina Ghela
    Digital Clinician Lead

  • Dr Susanna Hayter
    Digital Clinician

What's in the test?

Clotting status

PT

Learn more

Prothrombin is a plasma protein produced by the liver. A prothrombin time test measures how long it takes for the blood to clot. Clotting is caused by a series of clotting factors activating each other, including the conversion of prothrombin to thrombin.

APTT

Learn more

APTT, or Activated Partial Thromboplastin Time measures the speed at which blood clots in the body are formed, through a route known as the intrinsic pathway.

Fibrinogen

Learn more

INR

Learn more

The international normalised ratio (INR) is a laboratory measurement of how long it takes for blood to form a clot. This can be useful to be able to determine the effects of anticoagulants such as warfarin on the clotting system.

How to prepare for your test

Test limitations

Reviews

    FAQs

    Why take a clotting test?

    Clotting (or coagulation) tests often monitor people taking anticoagulants - medications that decrease the blood's ability to clot. Often, anticoagulant medications are prescribed if you have a heart attack or stroke. People with irregular heartbeats may also take anticoagulants to prevent a first or recurrent stroke.

    How is clotting measured?

    Our test evaluates the clotting tendency of blood and the time it takes for clots to form using the standard measures of prothrombin time (PT), APTT, and the International Normalised Ratio (INR), which comes from PT. INR typically helps to inform dosage for those taking anticoagulants and to monitor progress over time.

    What happens if blood doesn't clot properly?

    Some conditions can prevent blood from clotting properly, either causing the blood to clot too quickly or causing blood clots to remain in the body for too long.