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Prothrombin Time (PT)

Measures how long blood takes to clot using the ‘extrinsic’ clotting pathway. Results are often reported as PT seconds and/or INR.

฿455.00

Measures how long blood takes to clot using the ‘extrinsic’ clotting pathway. Results are often reported as PT seconds and/or INR.

Blood

15 min at lab

Results: 1 day

Typical Use

Used to monitor warfarin therapy, check bleeding risk before procedures, and help investigate easy bruising or bleeding, liver disease, or vitamin K deficiency.

Preparation

Wear clothing that allows easy access to your arm

Arrive well-hydrated

Continue regular medications unless advised otherwise by your doctor

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