Coagulation Studies (including INR, PT and APTT) Blood Test

Measures international normalised ratio (INR), prothrombin time (PT) and activated partial thromboplastin time (APTT).

Measures

International normalised ratio (INR), prothrombin time (PT) and activated partial thromboplastin time (APTT).

Why it matters

These describe how long blood takes to clot through different parts of the clotting cascade. PT and INR assess one pathway; APTT assesses another. Running them together indicates which part of the process is in question.

INR is also the measurement used to monitor certain anticoagulant medications.

Before you collect

Anticoagulant and some other medications directly affect these results — your practitioner needs to know what you're taking. Never adjust anticoagulant dosing based on a result without medical advice.

Suits

People whose practitioner has requested coagulation testing.

Your next step

Once you have your results, book with a Canwell naturopath, nutritionist or practitioner to talk them through and build a wellness plan that suits you. Book with Canwell