Question: how much platelets in 1 unit blood?
Answer: Whole blood derived platelets should contain a minimum of 5.5 x 1010 platelets per unit with an overall volume of around 50 mL. Apheresis platelets should contain a minimum of 3 x 1011 platelets per unit with an overall volume around 300 mL. Transfused platelets have an expected life-span of 3-4 days.