Skip to main content
Your session has expired. Reloading...
Coagulation

Prothrombin Time PT

PT (Prothrombin Time) measures how long it takes blood to form a clot through the extrinsic and common coagulation pathways. It evaluates factors VII, X, V, II, and fibrinogen. PT is commonly reported alongside INR.

Doctor's Assessment Included

PT (Prothrombin Time): what this test measures

This test measures the clotting time of plasma after adding tissue factor and calcium. The result is expressed in seconds. PT evaluates the extrinsic and common clotting pathways.

PT (Prothrombin Time): why this value matters

PT/INR is essential for warfarin monitoring, liver function assessment, and screening for clotting factor deficiencies.

PT (Prothrombin Time): how the blood test works

Referral
No GP referral needed. After the order we arrange the referral through ZorgDomein, within one business day; orders after 17:00 or at the weekend start on the next business day. ZorgDomein emails a barcode, and that barcode is what the draw site needs.
The draw
A blood draw from a vein in the arm, at a partner laboratory's draw site. No home kit, no finger prick.
Which test
on its own €13,-
Where
650+ draw sites run by independent laboratories across the Netherlands. Draw sites

PT (Prothrombin Time): when is testing worthwhile?

PT is ordered before surgery, for warfarin monitoring, when liver disease is suspected, or when unexplained bleeding occurs. It is frequently ordered alongside aPTT.

PT (Prothrombin Time): symptoms of a high or low value

Low Levels

A short PT may suggest a hypercoagulable state, though it is rarely clinically significant in isolation.

High Levels

A prolonged PT may indicate liver disease, vitamin K deficiency, warfarin effect, or factor deficiency. Symptoms may include easy bruising and prolonged bleeding.

PT (Prothrombin Time): lifestyle and this value

Ensure adequate vitamin K intake through green leafy vegetables. If on warfarin, maintain consistent dietary habits and attend regular monitoring.

PT (Prothrombin Time): frequently asked questions

What is the difference between PT and INR?

PT is the raw measurement in seconds. INR normalises PT across laboratories using an international standard.

Can vitamin K deficiency affect PT?

Yes. Vitamin K is essential for producing factors II, VII, IX, and X. Deficiency prolongs PT.

Why is PT important for liver assessment?

The liver produces most clotting factors. PT reflects liver synthetic function and is included in MELD and Child-Pugh scores.

See Lunarahealth more often in Google

Add us as a preferred source. Google will then show our articles more often in your search results and in AI overviews. You can turn this off again at any time.

That did not work. Please try again.

Tests with related values

These panels measure values from the same category as this marker.

Fertility & Pregnancy

IVF Blood Test Complete (Women)

Everything in the IVF panel plus full thyroid, preconception nutrients, progesterone and CMV immunity.

TSH (Thyroid Stimulating Hormone) Prolactin AMH (Anti-Müllerian Hormone) Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Free T4 (Thyroxine) Folate (Folic Acid) Vitamin B12 Ferritin Progesterone Vitamin D (25-OH) Chlamydia IgG HIV 1/2 Antibody + p24 Antigen Syphilis Screening Blood Type + Rh TPO Antibodies CMV IgG Hepatitis B Core Antibody Hepatitis B Surface Antigen Hepatitis C Antibody Rubella IgG Toxoplasmosis IgG Varicella Zoster D-Dimer Basic Blood Count
€495,-
Fertility & Pregnancy

IVF Blood Test (Women)

Complete female IVF intake panel: ovarian reserve, thyroid, infectious screening, immunity serology, blood group and CBC.

TSH (Thyroid Stimulating Hormone) Prolactin AMH (Anti-Müllerian Hormone) Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Chlamydia IgG HIV 1/2 Antibody + p24 Antigen Syphilis Screening Blood Type + Rh Hepatitis B Core Antibody Hepatitis B Surface Antigen Hepatitis C Antibody Rubella IgG Toxoplasmosis IgG Varicella Zoster D-Dimer Basic Blood Count
€425,-

Medical reviewer

Medical standards

Dr. Naimi oversees the medical standards behind our content and assessments.

Medical policy
CIBG Ministerie van Volksgezondheid,
Welzijn en Sport Official BIG registration BIG 49928676701 Opens in a new tab

PT (Prothrombin Time)

€13,-