[Changes in the plasma coagulation factors in patients subjected to plasmapheresis].

Eleven patients with immune-complex diseases were studied, that had been subjected to a total of 96 plasmaphereses during the day. The quantitative changes were followed up that developed in the active factors of coagulation after plasmapheresis. The results revealed that the plasma exchange, applied to the patients studied, induced the following changes: For factor I (fibrinogen)--mean = 2.39 +/- 1.19 g% (p greater than 0.005); for factor II (prothrombin)--mean = 55.5 +/- 20.9% (p less than 0.001); for factor V (proaccelerin)--mean = 97.6 +/- 13.8% (p greater than 0.01); for factor VII (proconvertin)--mean = 106.8 +/- 8.0% (p greater than 0.01); for factor VIII (AHG A)--mean = 64.5 +/- 22.7% (p less than 0.01); for factor IX (AHG B)--mean = 51.58 +/- 26.0% (p less than 0.001); for factor X--mean = 46.4 +/- 18.5% (p less than 0.001) and for factor XII--mean = 27.0 +/- 23.8% (p less than 0.001). That should be given consideration for the indications of the patients and their pretreatment for plasmapheresis.