Abstract
Summary
Lipids and proteins exist in peritoneal, pleural, joint, hydrocele, and pericardial effusions in large complexes having migrational characteristics in the ultra-centrifuge similar to plasma lipoproteins. Concentration ranges from 5 to 50% of that in plasma. Classification of fluids according to traditional concepts of pressure and irritation reveals that irritative fluids tend to have higher concentrations of low density lipoproteins, total cholesterol, and globulin than do pressure fluids. The origin of these large lipoprotein aggregates is uncertain. The various possibilities are discussed.
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