Prothrombin Time (PT/INR)
PT measures the extrinsic clotting pathway. INR standardizes results for warfarin monitoring and liver disease assessment.
Test Information
Reports In
Same day (6 hours)
Parameters
1
Requisites
Blood Sample
Sample Type
Blood
Measures
Extrinsic clotting pathway, INR
Identifies
Coagulation status, warfarin monitoring, liver function
What is the PT/INR Test?
Prothrombin Time (PT) and INR measure how quickly your blood clots via the extrinsic coagulation pathway. It's essential for monitoring patients on warfarin (blood thinner), pre-surgical assessment, and diagnosing bleeding disorders or liver disease (since the liver produces most clotting factors).
Why Should You Take This Test?
Essential for warfarin dosing. Evaluates clotting in liver disease and bleeding workup.
Who Should Get Tested?
On Warfarin/Blood Thinners
INR monitoring guides dosage.
Pre-Surgery
Ensures safe clotting ability.
Liver Disease
Liver produces clotting factors.
Unexplained Bleeding
Diagnoses clotting disorders.
Warning Signs — When Should You Get This Test?
Common Conditions Detected
Frequently Booked Together
Tests commonly ordered alongside PT/INR for a complete picture
APTT
Tests intrinsic clotting pathway
D-Dimer
Detects active clot formation
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