| abstract |
The evacuated blood sample collection tube or other container is treated by plasma enhanced chemical vapor deposition to apply a tie coating or layer (289), a barrier coating or layer (288), and optionally one or more additional coatings or Floor. The SiOxCy tie coat or layer is applied under partial vacuum, and while maintaining the partial vacuum in the lumen from being broken, the barrier coating or layer is applied. Then optionally, while maintaining the partial vacuum in the lumen from being broken, a pH protective coating or layer of SiOxCy can be applied. As a result of this treatment, a corresponding container produced by the same process except that the partial vacuum in the inner cavity is broken between applying the tie coating or layer and applying the barrier coating or layer is produced. than, a coated vessel with a lower gas permeation rate constant into the lumen. A retention feature for keeping these containers plugged during exposure to reduced ambient pressure is also described. |