Changes in plasma levels of thrombomodulin during haemodialysis

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Abstract
We studied the changes in plasma levels of thrombomodulin (TM) known to be present on vascular endothelial cells and released into circulating blood following damage to endothelial cells, during haemodialysis in 49 patients with end-stage chronic glomerulonephritis maintained on haemodialysis. After a single haemodialysis, plasma levels of TM were significantly elevated from 38.4 +/- 13.8 ng/ml to 46.8 +/- 14.6 ng/ml (p less than 0.05). Plasma levels of TM before haemodialysis were significantly higher in the cases of long-term haemodialysis than in those of short-term haemodialysis (p less than 0.01). From these observations, increased plasma levels of TM may be due to decreased clearance of TM by renal insufficiency, or damage to endothelial cells induced by the recurrent haemodialysis. In those patients with a greater residual blood volume in a dialyser, the changes in plasma levels of thrombin-antithrombin III complex and TM during a single haemodialysis were significantly higher. From these findings, it was suggested that endothelial cell damage is more severe in patients with greater residual blood volume.

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