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Transudate is extravascular fluid with low protein content and a low specific gravity (< 1.012). It has low nucleated cell counts (less than 500 to 1000 /microlit) and the primary cell types are mononuclear cells: macrophages, lymphocytes and mesothelial cells. For instance, an ultrafiltrate of blood plasma is transudate. It results from increased fluid pressures or diminished colloid oncotic forces in the plasma. == Transudate vs. exudate == Levels of lactate dehydrogenase (LDH) or a Rivalta test can be used to distinguish transudate from exudate. 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. Transudate usually appears more clear than exudate as it has low protein content.〔The University of Utah • Spencer S. Eccles Health Sciences Library > WebPath images > 〕 see also: Light's criteria for pleural effusions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Transudate」の詳細全文を読む スポンサード リンク
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