Abstract:Objective:To analyse the signification of platelet routine detection index in blood disease.Methods:We summarized MPV?PCT?PDW of platelet in 159 cases with blood disease,and observed the change of MPV?PCT?PDW at pre-remission and post-remision,which compared with normal control.Results:1. There was no significant difference in PDW between blood disease and normal control.2. There were obvious changes of MPV?PCT in blood disease:1) Compared with normal control,MPV of Aplastic Anemia (AA) had not reduced significantly,and PCT of AA lowered (P<0.01).2) In Idiopathic Thrombocytopenic Purpura(ITP),MPV was bigger than that of normal control,and PCT lowered (P<0.01,both).After platelet counts of ITP return to normal (ITP-N),MPV of ITP-N was still bigger than that of normal control (P<0.05),and there was no difference in MPV between ITP and ITP-N.3) MPV?PCT of Acute Leukemia (AL) was lower than those of normal control (P<0.01,both),and after AL complete remission (AL-CR),MPV of AL-CR was not only lower than that of normal control but also lower than that of AL (P<0.01,both).Conclusions:The change of MPV?PCT?PDW in blood disease,especially MPV,is valuable in diagnosing blood disease and judging disease inversion.