Pathophysiology of congestion and oedema

Question 1

What is congestion ?

Answer 1

Relative excess of blood in vessels of tissue or organ

- Passive process, secondary phenomenon 
- Not like acute inflammation- active hyperaemia 
    - Acute or chronic

Question 2

What is the pathophysiology of local acute congestion ?

Answer 2

DVT
Vein blocked causing local acute congestion
Blood backs up in veins, venules and capillaries
Decreased outflow of blood
Local, acute congestion
Decreased pressure gradient
Deceased flow across system
No O2-> ischaemia and infacrtion

Question 3

What is the pathophysiology of local chronic congestion ?