In this article, we will discuss the Definition and Causes of Edema. So, let’s get started.
It is the excessive collection of tissue fluid in the interstitial space. Generation of interstitial fluid is regulated by the forces of the Starling equation. Hydrostatic pressure within blood vessels tends to cause water to filter out into the tissue. This leads to a difference in protein concentration between blood plasma and tissue. As a result, the oncotic pressure of the higher level of protein in the plasma tends to suck water back into the blood vessels from the tissue. Starling’s equation states that the rate of leakage of fluid is determined by the difference between the two forces and also by the permeability of the vessel wall to water, which determines the rate of flow for a given force imbalance.
Increased hydrostatic pressure of blood
Decreased osmotic pressure of blood
Increased capillary permeability
Slowed flow of blood and lymph