Activator attachment for blood control catheters

A catheter assembly system comprising:

• a catheter adapter having an inner lumen extending between a proximal opening of the catheter adapter and a distal end of the catheter adapter, the proximal opening of the catheter adapter having an inner diameter;
• a septum disposed within and selectively sealing the inner lumen;
• a septum activator disposed within the inner lumen at a location proximal to the septum and having a proximal opening, the proximal opening of the septum activator having an inner diameter less than the inner diameter of the catheter adapter, the septum activator being configured to advance distally through a slit in the septum;
• and
• an activator attachment comprising:
• a proximal end having a proximal opening;
• a connector portion comprising a set of threads;
• a probe member having an outer diameter less than the inner diameter of the proximal opening of the catheter adapter and greater than the inner diameter of proximal opening of the septum activator;
• and
• an extension member that extends from a distal end of the probe member, wherein an unrestricted lumen extends from the proximal opening of the activator attachment through the probe member and the extension member, the extension member having an outer diameter less than the inner diameter of the proximal opening of the septum activator, wherein the distal end of the probe member forms a distal-facing ridge that extends radially outward from the extension member, wherein in response to the activator attachment being inserted into the proximal opening of the catheter adapter a first amount, the probe member inserts into the proximal opening of the catheter adapter, the distal-facing ridge contacts a proximal end of the septum activator, the extension member inserts into the proximal opening of the septum activator, the unrestricted lumen is in fluid communication with the inner lumen of the catheter adapter, and the septum remains closed,
• wherein in response to the connector portion being threaded to the proximal end of the catheter adapter such that the activator attachment is inserted into the proximal opening of the catheter adapter a second amount, the distal-facing ridge forces the septum activator distally through the septum, wherein when the extension member inserts into the proximal opening of the septum activator, a distal end of the extension member is disposed within the inner lumen of the catheter adapter.