<prompt> The threshold for prophylactic platelet transfusion is ___platelets mL.5000100001500050000  <response>: The threshold for prophylactic platelet transfusion is 10,000mL. For invasive procedures, the target level is 50,000mL. Note: Shelf life of donor platelets is 5 days.It is stored on a special agitator at 20-24 degC. The half-life of transfused platelets is 3-5 days. One unit of pooled platelets should be infused over a period of time less than 30 minutes because of the risk of bacterial proliferation. 