Haemostasis 3 Coagulation tests & Intro to bleeding disorders

Tests of haemostasis

prothrombin time

test which see how fast the extrinsic pathway works pt reference interval ~ 9-13 seconds

INR

APTT

test to see how the intrinsic pathway works normal aptt time is 22-34 seconds

fibrinogen

fibrinogen can be measured directly

Coagluation factor assays

introduction to bleeding disorders