Laboratory test
Prothrombin time, prothrombin index and INR
Test code · КГ.005
PT, prothrombin index and INR describe the result of the prothrombin test, which investigates selected parts of blood coagulation.
- Specimen
- Sodium citrate blood
- Turnaround time
- 1–2 days
Collection points for the selected city
About the test
PT, prothrombin index and INR describe the result of the prothrombin test, which investigates selected parts of blood coagulation. Prothrombin time reflects clot formation after a reagent is added; prothrombin index and INR are related ways of expressing the result. INR is particularly important when monitoring vitamin K antagonist treatment, for which the doctor sets an individual target.
Changes may relate to medicines, factor deficiencies and liver disease. An anticoagulant dose must not be changed independently based on the result. The doctor assesses the result together with symptoms, medical history and other investigations. The reference values of the individual laboratory are used for comparison, and changes over time are considered during follow-up.
Why it is ordered
- Assess the prothrombin component of coagulation.
- Monitor prescribed vitamin K antagonist treatment.
- Complement investigation of the causes of bleeding.
How to prepare
Before taking the test, check the preparation and specimen collection requirements with the laboratory. Tell your doctor about medicines and recent treatment. Do not stop prescribed medicines on your own.
Where to have the test
All collection pointsCheck whether the test can be taken at your chosen collection point.
Happy Clinic
Rasul Dent
We will help you prepare for your visit
We will answer questions about services and the testing process.