haemostasis Flashcards
(5 cards)
1
Q
what is haemostasis?
A
stopping bleeding while maintaining blood flow
2
Q
what are the phases of haemostasis?
A
vessel constriction
primary haemostasis (platelet plug formation)
secondary haemostasis (coagulation)
3
Q
what happens in platelet plug formation?
A
platelets adhere to collagen, platelets activate chemicals that recruit more platelets, platelets aggregate to form barrier
4
Q
what happens in coagulation?
A
intrinsic (activated by vessel wall damage) and extrinsic pathway (initiated by tissue factor)
5
Q
both pathways converge into the common pathway which results in…
A
Activation of Factor X to Xa
