Mechanism 2. iver and spleen: (1)1/3 platelets are held within the spleen (2) spleen produces platelet associated Ab (3) liver and spleen erase platelet 7-11 days in normal persons, 1-3 days in patientsMechanism 2.liver and spleen： （1）1/3 platelets are held within the spleen （2）spleen produces platelet associated Ab （3）liver and spleen erase platelet：7-11 days in normal persons, 1-3 days in patients