Objective:To retrospectively analyze the transfusion efficacy of Rh-negative patients with Rh-posive apheresis platelet.Method:Rh-negative patients received Rh-positive apheresis platelet transfusion without injecting immune globulin.The blood platelet counts of these patients 24 hours before and after the transfusions were measured,and the CCI was calculated.And the CCI of control group was calculated at the same time.The CCI of the two groups was compared to evaluate the curative effect.In the follow-up p...