Effect of hemodialysis on plasma beta thromboglobulin levels.

BTG levels are significantly elevated in patients on chronic hemodialysis. The increased levels are not due to turbulent flow within the vascular access, but may be due to platelet aggregation within the hemodialyzer during the first hour of dialysis. This effect is observed with the Travenol CF series hollow fiber (cuprophane) but not the Cordis-dow artificial kidney (regenerated cellulose).