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