Coagulation Studies (including INR, PT and APTT) Blood Test
Coagulation Studies (including INR, PT and APTT) Blood Test
Woman in medical attire with a stethoscope on a pink background, featuring text about a medical team being ready to help.
Coagulation Studies (including INR, PT and APTT) Blood Test
Coagulation Studies (including INR, PT and APTT) Blood Test
Coagulation Studies (including INR, PT and APTT) Blood Test
Coagulation Studies (including INR, PT and APTT) Blood Test
Coagulation Studies (including INR, PT and APTT) Blood Test
Woman in medical attire with a stethoscope on a pink background, featuring text about a medical team being ready to help.
Coagulation Studies (including INR, PT and APTT) Blood Test
Coagulation Studies (including INR, PT and APTT) Blood Test
Coagulation Studies (including INR, PT and APTT) Blood Test

Over 250k Biomarkers Tested

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

$45.00 AUD

On warfarin or other blood thinners, preparing for surgery, or investigating unexplained bleeding or bruising?

Measures INR, Prothrombin Time (PT), and APTT to assess the blood's clotting pathways. Used to monitor warfarin and heparin therapy, screen for bleeding disorders, and assess clotting function before surgery.

Collection Location
Specimen Type

You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.

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How It Works

Getting your health measured shouldn't be hard! We're here to help you every step of the way.

1
Order a test

Order a test

Order the private test that suits you and your goals. After ordering, you will receive your referral by email.

2
Collect the sample

Collect the sample

Attend one of our 4000+ partner collection centres throughout Australia. Search locations.

3
Receive your results

Receive your results

View all your lab results in your secure health dashboard. Easy!

Overview

Coagulation studies measure how quickly your blood clots through different pathways. This panel includes three complementary tests that together assess your clotting function.

PT (Prothrombin Time) measures the extrinsic clotting pathway. INR (International Normalised Ratio) standardises PT results for warfarin monitoring across different laboratories. APTT (Activated Partial Thromboplastin Time) measures the intrinsic pathway, useful for heparin monitoring and haemophilia screening.

These tests are commonly used for anticoagulant therapy monitoring, pre-surgical assessment, and investigating bleeding or clotting disorders.

Symptoms

Suited to people on anticoagulant therapy (warfarin, heparin), preparing for surgery, with a known or suspected bleeding disorder, liver disease, or unexplained bleeding or bruising.

Questions

  • PT measures how long the extrinsic clotting pathway takes. INR standardises PT for warfarin monitoring. APTT measures the intrinsic pathway. Together they assess overall clotting function.
  • INR standardises PT results across laboratories, allowing consistent warfarin dosing regardless of which lab performs the test.
  • Typically 2.0 to 3.0 for most conditions, 2.5 to 3.5 for mechanical heart valves. Your target depends on your specific condition and your doctor's recommendation.
  • Warfarin therapy, liver disease, vitamin K deficiency, and clotting factor deficiencies can prolong PT and INR.
  • Heparin therapy, haemophilia, von Willebrand disease, lupus anticoagulant, and clotting factor deficiencies can prolong APTT.
  • Initially weekly until stable, then every 2 to 4 weeks. More frequent testing may be needed if INR is unstable or after changes to medications or diet.

Dr. Vu Tran
Bloody Good’s Chief Medical Officer

3 Biomarkers Tested

How to prepare

No fasting required. If you take warfarin or heparin, take your usual dose as directed unless your doctor advises otherwise. Let the pathology collector know about all medications you are taking, especially blood thinners and supplements.

After the test

Your test results will be available in your private dashboard. If there are any urgent issues, we'll let you know so you can follow up with your health professional.

Understanding results

Results show your PT, INR, and APTT values compared to reference ranges. For people on warfarin, the therapeutic INR range is typically 2.0 to 3.0 (or 2.5 to 3.5 for mechanical heart valves). Values outside your target range may require dose adjustment. Your doctor will interpret results alongside your medication regimen and clinical context.

Testimonials

What Our Customers Say

4.9
Average Rating
5,500+ Customers Tested
250,000+ Individual Biomarkers
A
Adam O. ACT

Simple health checks in my control

I didn't know that private blood tests were an option. Tried this platform as the packages suited what I wanted for a good price. Easy to follow instructions, and super quick results. Platform provides more information than my gp's ever have on the tests and what the results meant. Would like more clinics to be able to test at (specifically Capital Pathology) but there is a decent network. Will continue to use.

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Wayne S. NSW

Bloody Good

This is a great service, very helpful support, cheaper than going to the doctor for a blood test

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Christopher N. NSW

Quick access to blood tests

BLOODY GOOD is a very efficient route to access blood testing for a visitor outside the Australian health system. It is quick with the necessary referral and documentation, and quick with results. Thank you

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Rebecca Y NSW

Great Service!

Fantastic service to deal with, I love the extra explanations for all the tests.

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Olga B. New South Wales

Convenient

Getting a referral was easy. Laverty pathology accepted it. Bloody Good offers an affordable and convenient way to check essential blood markers.

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Quick, easy, hassle free

Excellent service, quick, easy, hassle free, can recommend.

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Very easy to use. Love that it stores your blood tests.

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Andre D. QLD

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Wayne NSW

5 Stars

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Frequently bought together

Frequently Asked Questions

Most collection centres accept walk-ins. Some may require a booking - check details when you click on your chosen location.

If your test needs fasting, we’ll include that in your instructions after you order. Fasting usually means no food for 8–12 hours, but water is fine.

Just your pathology referral form (we email it to you)

Of course. Just maybe don’t bring the friend who faints at the sight of blood.

They’re the highly trained professionals who take your blood sample - with a steady hand and a sharp needle. They love blood, but don’t worry… they’re not vampires. Just legends who make blood tests quick, clean, and (almost) painless.

Some of our tests include Urine, Stool, Saliva and more. Each test will have a clear description on what sample you will need to give and instructions on how.