Blood collection assembly with the addition means delivery device and method for the sample collecting using the same

摘要

A blood collection assembly includes an evacuatedcontainer having an open end with a puncturable stoppertherein. A liquid impermeable receptacle in the containercontains an additive and is removably immobilized in thestopper.In a method for preparing a blood sample for analysis,the stopper is punctured by a cannula connected to a bloodsupply. The cannula is then advanced until it contactsand dislodges the receptacle from the stopper causing theadditive to be released directly into the container whereit mixes with incoming blood.