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PT (Prothrombin Time)

This Medical Laboratory Science lesson in Hematology supports laboratory science learning and laboratory interpretation for medical laboratory students and professionals.

Prothrombin time principles, extrinsic/common pathway screening, reagent variation, and institutional reference intervals.

Intermediate30 min read21 sectionsHematology
Section 1 of 210%

Learning Objectives

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Section 1 of 21

Learning Objectives

Learning Objectives

Section: Learning Objectives

Coagulation assays are screening tools, interpret with specimen quality, reagent context, and institutional reference intervals.

  • Describe PT assay principle (tissue factor activation of factor VII pathway)
  • List factors evaluated: VII, X, V, II, fibrinogen
  • Recognize warfarin, liver disease, and factor deficiency associations, pattern support only
  • Apply institutional reference interval, no universal numeric cutoff

Section 1 of 21