1 Select the Triggers tab, and then select New. 2  Set your time and frequency, and then select OK. 3  Open Windows Defender by clicking the Start button. In the search box, type Defender and then, in the list of results, click Windows Defender.  Click Tools, and then click Options.
â Platelet refractoriness is the inability to get an adequate increase in platelet count after transfusion (Arch Pathol Lab Med 2003;127:409, Haematologica 2005;90:247) â Immune causes: anti-platelet or anti-HLA antibodies after multiple exposures from transfusion, pregnancy or transplantation (Transfusion 2005;45:761)
platelet count, a blood test that is performed on all patients who develop petechiae, spontaneous bleeding, or increasingly heavy menses. It is also used to monitor the course of the disease or therapy for thrombocytopenia or bone marrow failure.