Haemodialysis leads to monocytes activation and secretion of cytokines, which stimulates hepatic production of CRP. To assess the biocompatibility of haemodialysis the CRP serum levels were measured. CRP serum levels during haemodialysis with the use of cuprophane membranes increased from 4743.3 +/- 3251.6 ng/ml to 5231.8 +/- 3458.4 ng/ml just after haemodialysis and 5865.4 +/- 3684.8 ng/ml 22 hours after haemodialysis (p < 0.001). During haemodialysis using polysulfone membranes CRP from the initial value of 4819.4 +/- 4328.2 ng/ml decreased to 3316.9 +/- 3882.7 ng/ml just after haemodialysis (p < 0.01) and increased to 5086.9 +/- 4193.0 ng/ml 22 hours after haemodialysis (p < 0.05). Re-counted CRP values, according to changes in total blood protein, increased significantly (p < 0.02) 22 hours after haemodialysis with the use of cuprophane membranes. During haemodialysis using polysulfone membranes above mentioned levels were significantly decreased just after haemodialysis (p < 0.001). The cuprophane membranes surface area and reutilization of dialyzers did not affect the changes of CRP serum levels. No correlation was observed between CRP level changes and dialysis neutropenia and complement activation. Our results indicate, that CRP serum level measurement may be feasible to assess the biocompatibility of dialysis membranes.
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