Blood collection system with venipuncture indicator

摘要: A blood sample collection system including an indicator for denoting successful venipuncture prior to entry into evacuated tube portion of the system. The includes a double ended cannula open at both ends and having passageway therethrough. holder is provided mounting thereon with one end extending forwardly adapted other rearwardly being coupling container. container has closed by self-sealing puncturable stopper. stopper be penetrated rear provide fluid communication between through interior pressure responsive on stoppered physically deform when introduced vein predetermined distance deformation sufficient permit small amount enter visual observation venipuncture. Indexing structure facilitate relative positioning penetrating therethrough in least position operation indicator.