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Special Instructions
This sample must be taken at our London laboratory.


About this test

Our Activated Partial Thromboplastin Time test is a haematology blood test used to monitor clotting in the blood.

The test measures the speed at which blood clots in the body are formed, through a pathway known as the intrinsic pathway. The test measuring the speed of clotting in the extrinsic pathway is called prothrombin time and is normally used in conjunction with the aPTT test to find the overall speed of blood clotting.

Prolonged aPTT may indicate a clotting factor deficiency, antiphospholipid syndrome and many other conditions. The test can also be performed to monitor the effects of the drug heparin, which can slow down clotting time.

Who is this test for?

Our Activated Partial Thromboplastin Time (APTT) test is for those with a family history of clotting disorders, those who want to investigate a potential diagnosis and for those taking heparin who want to monitor its effects.

How it works

Collect Sample

We send you an easy-to-use kit to collect your blood sample.

Post Sample

Post your sample to our lab in the prepaid envelope provided.

View Results

View results securely in your own personal dashboard.

Important Information

Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.

Tests Included

Clotting Status

Laboratory appointment in London

Your Blood sample will be analysed at our chosen laboratory based in the heart of London's medical district. You can be assured of fast, accurate results from the UK's largest independent provider of clinical diagnostic tests

Private laboratory analysis

Your blood sample will be analysed at one of our chosen laboratories. You can be assured of fast, accurate results from one of our accredited independent providers of clinical diagnostic tests.

Interpretation of results

Our medical team will comment on out-of-range blood test results and give you follow-up advice where necessary. If you need it, a PDF copy of your APTT (KCCT) test results can be downloaded for your doctor.

Secure online account

Once you have placed your order you can visit my.medichecks.com where you can manage your account, track your orders and view your APTT (KCCT) test results.

Health and Lifestyle tracker

Stay motivated by filling in your online health and lifestyle questionnaire and seeing how improvements in your lifestyle can influence your test results. Your medical and family history gives us vital information when interpreting your results.

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