title: Coagulation factors and fibrinogen in pleural effusions.
abstract: 31 pleural effusions from 27 patients with varied diseases were studied for specific coagulation factors and fibrinogen. In all fluids, exudates had a higher content of factors and fibrinogen than transudates. When pleural fluid to plasma total protein ratios were compared to specific coagulation factors a positive correlation existed for all. This was not true for fibrinogen. There was a poor correlation between the molecular weights of the specific factors and fibrinogen and their appearance in the pleural fluid. The concentration of factor XII in 35% and factor XI in 11% of pleural fluid exceeded their respective plasma concentration.
mesh_terms: D000328:Adult; D001779:Blood Coagulation Factors / Q000032:analysis*; D001798:Blood Proteins / Q000032:analysis; D005172:Factor XI / Q000032:analysis; D005174:Factor XII / Q000032:analysis; D005260:Female; D005340:Fibrinogen / Q000032:analysis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010996:Pleural Effusion / Q000032:analysis*
chemical_list: D001779:Blood Coagulation Factors; D001798:Blood Proteins; D005174:Factor XII; D005340:Fibrinogen; D005172:Factor XI