[Measurement of the calcium content of thrombocytes as a contribution to the recognition of a disposition to thrombosis].

Calcium content of platelets from 57 patients undergoing total hip replacement was measured preoperatively. 13 patients developed deep vein thrombosis (D.V.T.) as recognized by 125I-fibrinogen technique and confirmed phlebographically. Preoperatively this group of patients exhibited a significant lower mean platelet calcium content than the group without postoperative D.V.T. It seems to be possible that special platelet parameters could hint an increased risk from postoperative D.V.T.