Hemostasis basics

Question 1

Hemostasis

Answer 1

Stoppage of bleeding

Question 2

hemostasis in small vessels vs large vessels

Answer 2

most effective in small vessels

body usually can’t control bleeding from medium/large artery

Question 3

venous bleeding

Answer 3

less rapid blood loss due to low BP
raising the bleeding part above heart level (increasing hydrostatic pressure) may stop haemorrhage
internal venous bleeding causing blood accumulation in tissues may interstitial pressure enough to eliminate pressure gradient for blood loss

Question 4

hematoma

Answer 4

accumulation of blood in tissue

any vessel type

Question 5

vessel’s inherent response to damage or severance

Answer 5

constriction
changes in local vasodilator and constrictor substances released by endothelial and blood cells
constriction presses endothelial walls together

Question 6

substances released by endothelial/blood cells

Answer 6

local vasodilator and constrictor substances

change during constriction induced by vessel damage

Question 7

permanent closure of vessel by constriction

Answer 7

occurs only in smallest vessels of microcirculation

Question 8

factors affecting staunching of bleeding

Answer 8

formation of a platelet plug

blood coagulation