| 主权项 |
1. A catheter assembly, comprising:
a catheter adapter having an inner lumen, the inner lumen including an annular ridge; a septum disposed within a portion of the inner lumen; an introducer needle extending through the inner lumen of the catheter adapter, the introducer needle having an outer diameter, the introducer needle having a notch disposed on the distal end of the introducer needle, the notch being positioned at a notch distance from a distal tip of the introducer needle; and a septum activator disposed within the inner lumen of the catheter adapter proximal to the septum, the septum activator comprising a sleeve portion and a proximal portion, the sleeve portion forming a distal portion of the septum activator, the sleeve portion comprising an inner lumen having an internal diameter approximately equal to the outer diameter of the introducer needle along the length of the sleeve portion, the septum activator further including one or more flushing fins positioned on an outer surface of the septum activator so as to contact the annular ridge to limit the proximal movement of the septum activator, the annular ridge being positioned such that the distal end of the septum activator remains in contact with the septum when in a proximal-most position, the sleeve portion having a length greater than the notch distance so that, when the introducer needle is withdrawn proximally, the notch remains contained within the sleeve portion until after the distal tip of the introducer needle is drawn through the septum and into the sleeve portion. |
