Edema

Edema is swelling of subcutaneous net, which when pressed will leave the basin (as well). The skin looks shiny and pale. This is caused by an abnormal accumulation of fluid between the cells outside the blood vessel.

Usually among the cell there is always a liquid, only in this edema excessive fluid. Space between cells called the interstitial space.

The way to be formed of Edema 
Let us consider the interstitial space. All cells are covered by a liquid body is very important that the extracellular fluid, which is sometimes called the internal milieu interior or the environment.


Some important fluid of the extracellular fluid:
• The temperature of this fluid should always be appropriate
• Must have an osmotic pressure that is always quick
• Must have a pH that is always fast.
 
In these streams there are also small molecules and ions of sodium and potassium as well as nutrients for the needs of cells such as glucose.
The greatest one is, gases such as oxygen or carbon dioxide will diffuse freely through the cell body: there should be no holes in between the cells. When filtering out the water goes on and on without a hitch, in a few hours no more water left in the bloodstream. Circulation stops are followed by death. There is nothing like this in large burns (heat injury). Here the capillaries damaged by fire and water-soluble substances and in it will disappear quickly, which may cause death.
Capillaries healthy always "leaked", the water flows out into the network but at the same center also water into the capillaries.

Mechanism of body fluid balance
Approximately 100 years ago, physiologists Ernest Starling knows English: that blood proteins that retain fluid in the capillaries.
As has been explained 45% of blood containing blood cells and 55% plasma. In this plasma is 7.5 g% protein. This protein would seem to settle when spiked sulfosalisilat acid or simply by heating.
 
Pathophysiology of edema:
Edema occurs when too much fluid into the interstitial space of the can out at the same time.
There are 3 factors that play a role in the incidence of edema:
• capillary walls so that the protein molecules to leak out easily into the interstitial fluid.
• Pressure on the ends of the capillary veins are still quite high and higher than the colloid osmotic pressure.
• blood colloid osmotic pressure is too low.