<prompt> Blood platelets in stored blood do not remain functional after12 hrs24 hrs48 hrs72 hrs  <response>: Platelet concentrates Volume :50ml Platelets are the only blood products which are stored at room temperature, 20-24 degC Survival is 4-5 days 1 unit of platelet increases the count by 5000-10000 The threshold for prophylactic platelet transfusion is 10000 uL For invasive procedures, 50000uL platelets is the usual target level Platelet count should be 1,00,000uL before accepting the patient for surgery Transfused platelets generally survive for 2-7 days following transfusion ABO compatibility is desirable but not necessary Blood platelets in stored blood are non functional after 24 hours Ref: Harrisons 19th edition pgno: 953 Sabiston 20th edition pgno:588 