Activator attachment for blood control catheters

1. 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;

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, the septum activator being configured to advance distally through a slit in the septum, the septum activator including one or more interlocking mate features; and

an activator attachment comprising:

a body configured to attach to a proximal end of the catheter adapter;

a probe member that extends from a distal end of the body; and

an extension member that extends from the distal end of the probe member;

wherein a distal end of the probe member has a first diameter and a proximal end of the extension member has a second diameter less than the first diameter such that a contact surface is formed between the distal end of the probe member and the proximal end of the extension member, the contact surface forming a distal-facing ridge that extends radially outward between the proximal end of the extension member and the distal end of the probe member, the contact surface being configured to contact a proximal end of the septum activator when the activator attachment is connected to the catheter adapter thereby forcing the septum activator distally through the septum, the extension member being shaped and sized to fit within a proximal opening of the septum activator when the contact surface contacts the proximal end of the septum activator, and wherein the extension member includes one or more interlocking features disposed on an outer surface of the extension member, the one or more interlocking features being configured to insert within the one or more interlocking mate features of the septum activator when the contact surface contacts the proximal end of the septum activator such that, when the activator attachment is withdrawn from within the catheter adapter, the extension member pulls on the septum activator to withdraw the septum activator from the septum;

wherein an activator attachment lumen extends from a proximal opening formed at a proximal end of the body to a distal opening positioned at a distal end of the extension member.

2. The catheter assembly system of claim 1 , wherein the catheter adapter forms a female luer fitting and the adapter assembly forms a corresponding male luer fitting.

3. The catheter assembly system of claim 2 , wherein the luer fittings are luer lock fittings.

4. The catheter assembly system of claim 2 , wherein the luer fittings are luer slip fittings.

5. The catheter assembly system of claim 1 , wherein a proximal portion of the activator attachment includes a channel portion.

6. The catheter assembly system of claim 5 , wherein the channel portion includes one or more grip portions.

7. The catheter assembly system of claim 1 , wherein a diameter of the activator attachment lumen increases from the distal opening to the proximal opening.

8. The catheter assembly system of claim 1 , wherein the probe member forms a male luer taper.

9. The catheter assembly system of claim 1 , wherein a proximal end of the catheter adapter includes a flange and the body includes a collar that extends around the flange to couple the activator attachment to the catheter adapter.

10. The catheter assembly system of claim 1 , wherein a sidewall of the septum activator includes one or more openings and the extension member is configured to cover the one or more openings when the extension member is fit within the proximal end of the septum activator.

11. The catheter assembly system of claim 1 , wherein the interlocking feature comprises one or more protrusions that insert into one or more holes in a sidewall of the septum activator.

12. A catheter assembly 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;

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, the septum activator being configured to advance distally through a slit in the septum, the septum activator including one or more interlocking mate features; and

an activator attachment comprising:

a body configured to attach to a proximal end of the catheter adapter;

a probe member that extends from a distal end of the body; and

an extension member that extends from the distal end of the probe member;

wherein a distal end of the probe member has a first diameter and a proximal end of the extension member has a second diameter less than the first diameter such that a contact surface is formed between the distal end of the probe member and the proximal end of the extension member, the contact surface forming a distal-facing ridge that extends radially outward between the proximal end of the extension member and the distal end of the probe member, the contact surface being configured to contact a proximal end of the septum activator when the activator attachment is connected to the catheter adapter thereby forcing the septum activator distally through the septum, the extension member being shaped and sized to fit within a proximal opening of the septum activator when the contact surface contacts the proximal end of the septum activator, and wherein the extension member includes one or more interlocking features disposed on an outer surface of the extension member, the one or more interlocking features being configured to interlock with the one or more interlocking mate features of the septum activator when the contact surface contacts the proximal end of the septum activator such that, when the activator attachment is withdrawn from within the catheter adapter, the extension member pulls on the septum activator to withdraw the septum activator from the septum;

wherein an activator attachment lumen extends from a proximal opening formed at a proximal end of the body to a distal opening positioned at a distal end of the extension member.

13. The catheter assembly of claim 12 , wherein the interlocking mate features comprise three or more openings through a sidewall of the septum activator and the interlocking mate features comprise three or more protrusions that each insert into one of the openings.

14. The catheter assembly of claim 13 , wherein, when the contact surface contacts the proximal end of the septum activator, the openings extend distally beyond a distal end of the extension member.

15. The catheter assembly of claim 12 , wherein the one or more interlocking features comprise one of indents or protrusions formed on the extension member.

16. The catheter assembly of claim 12 , wherein the one or more interlocking mate features comprise openings through a sidewall of the septum activator.

17. The catheter assembly of claim 12 , wherein the inner lumen includes a protrusion positioned proximal to the septum activator, the protrusion preventing the septum activator from being removed through the proximal opening.

18. The catheter assembly of claim 12 , wherein a proximal end of the catheter adapter includes a flange and the body includes a collar that extends around the flange to couple the activator attachment to the catheter adapter.

19. The catheter assembly of claim 12 , wherein a sidewall of the septum activator includes one or more openings and the extension member is configured to cover at least a portion of the one or more openings when the extension member is fit within the proximal end of the septum activator.

20. The catheter assembly of claim 12 , wherein a diameter of the activator attachment lumen increases from the distal opening to the proximal opening.