Version 2.77


The prothrombin time (PT) and its derived measures of prothrombin ratio (PR) and international normalized ratio (INR) are measures of the extrinsic pathway of coagulation. They are used to determine the clotting tendency of blood, in the measure of warfarin dosage, liver damage and vitamin K status. The reference range for prothrombin time is usually around 12-15 seconds; the normal range for the INR is 0.8-1.2. It is used in conjunction with the activated partial thromboplastin time (aPTT) which measures the intrinsic pathway. PT is sometimes used as the third screening test in the lupus anticoagulant testing algorithm and is included in the LOINC LA aPTT & dRVVT & PT panel. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See for details. Source: Wikipedia, Coagulation tissue factor induced (Wikipedia)

Measures the clotting time from the activation of factor VII. Source: Regenstrief Institute

Basic Part Properties

Part Display Name
Prothrombin time (PT)
Part Type
Component (Describes the core component or analyte measured)
Created On
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Language Variants Get Info

Tag Language Translation
zh-CN Chinese (China) 组织因子诱导型凝血过程
Synonyms: PT;凝血因子 VII 诱导型凝血作用;凝血因子 VII 诱导的凝血作用;凝血因子Ⅶ诱导型凝血作用;凝血因子Ⅶ诱导的凝血作用;凝血酶原时间;凝血酶原时间(Prothrombin Time,PT);因子 VII 诱导型凝血作用;因子 VII 诱导的凝血作用;因子Ⅶ诱导型凝血作用;因子Ⅶ诱导的凝血作用;组织因子诱导型凝血;组织因子诱导型凝血作用;组织因子诱导的凝血;组织因子诱导的凝血作用;组织因子诱导的凝血过程
fr-CA French (Canada) Temps de prothrombine
et-EE Estonian (Estonia) Protrombiini aeg
es-ES Spanish (Spain) Tiempo de Protrombina
it-IT Italian (Italy) Coagulazione indotta del fattore tissutale
Synonyms: Tempo di protrombina (PT)
tr-TR Turkish (Turkey) Koagülasyon dokusu faktör uyarılmış
ru-RU Russian (Russian Federation) Коагуляция тканевым фактором индуцированная
Synonyms: Протромбиновое время (ПВ)
nl-NL Dutch (Netherlands) protrombinetijd
fr-BE French (Belgium) Temps de prothrombine
pl-PL Polish (Poland) Czas protrombinowy