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Diagnostic haemostasis laboratories - routine testing


Coagulation screening tests

  • INR & APTT mixing studies
  • INR for oral anticoagulant monitoring
  • APTT for heparin monitoring
  • Clauss fibrinogen
  • Thrombin time
  • Reptilase time
  • D-dimers

Results for all these tests are available on the day of request.


Coagulation screening tests are available 24 hours a day and can be requested as urgent where appropriate.

Sample requirements

Citrate (blue top tube)

One 4.5 ml citrated sample is sufficient for each of the above tests or any combination of them.


Monday - Friday, 9am - 5.15pm

St Thomas’ tel:  020 7188 2799

Guy’s tel: 020 7188 9095