It results from increased fluid pressures or diminished colloid oncotic forces in the plasma.
Transudates are caused by disturbances of hydrostatic or colloid osmotic pressure, not by inflammation.
They have a low protein content in comparison to exudates and thus appear clearer.
[6] Levels of lactate dehydrogenase (LDH)[7] or a Rivalta test can be used to distinguish transudate from exudate.
[citation needed] Their main role in nature is to protect elements of the skin and other subcutaneous substances against the contact effects of external climate and the environment and other substances – it also plays a role in integumental hygiene.