An extravascular system for accessing the vasculature of a patient, comprising: a catheter adapter having a distal end supporting a catheter , and further comprising a proximal opening, the catheter adapter having a lumen; an introducer needle comprising a sharpened tip and a needle feature ; an access port coupled to an outer surface of the catheter adapter and having an inner lumen that is in fluid communication with the lumen of the catheter adapter ; a blood control septum disposed within the lumen of the catheter adapter and dividing the lumen into a proximal fluid chamber and a distal fluid chamber; a defeatable barrier disposed within the lumen of the catheter adapter and forming a sealed interface with the inner lumen of the access port; a septum activator slidably positioned within the proximal fluid chamber, the septum activator having a base and a probe end ; and a needle shield removably coupled to the proximal opening of the catheter adapter and comprising a safety clip , wherein the safety clip comprises a distal end and a proximal end, wherein the distal end of the safety clip is biased away from a distal aperture of the needle shield when the needle is disposed within the distal aperture, characterized in that in response to the sharpened tip of the needle being withdrawn into the needle shield beyond the distal aperture, the distal end of the safety clip is released from the biased position and blocks the distal aperture thereby preventing the sharpened tip from exiting a distal end of the needle shield , and that the proximal end of the safety clip forms a washer , wherein the washer comprises an aperture configured to prevent passage of the needle feature . a catheter adapter having a distal end supporting a catheter , and further comprising a proximal opening, the catheter adapter having a lumen; an introducer needle comprising a sharpened tip and a needle feature ; an access port coupled to an outer surface of the catheter adapter and having an inner lumen that is in fluid communication with the lumen of the catheter adapter ; a blood control septum disposed within the lumen of the catheter adapter and dividing the lumen into a proximal fluid chamber and a distal fluid chamber; a defeatable barrier disposed within the lumen of the catheter adapter and forming a sealed interface with the inner lumen of the access port; a septum activator slidably positioned within the proximal fluid chamber, the septum activator having a base and a probe end ; and a needle shield removably coupled to the proximal opening of the catheter adapter and comprising a safety clip , wherein the safety clip comprises a distal end and a proximal end, wherein the distal end of the safety clip is biased away from a distal aperture of the needle shield when the needle is disposed within the distal aperture, characterized in that in response to the sharpened tip of the needle being withdrawn into the needle shield beyond the distal aperture, the distal end of the safety clip is released from the biased position and blocks the distal aperture thereby preventing the sharpened tip from exiting a distal end of the needle shield , and that the proximal end of the safety clip forms a washer , wherein the washer comprises an aperture configured to prevent passage of the needle feature . <EOS>