Septum to facilitate blood collection and related methods

A catheter assembly, comprising:

• a catheter adapter, comprising a lumen extending through the catheter adapter;
• a catheter extending distally from the catheter adapter;
• and
• a septum, comprising:
• a housing secured within the lumen of the catheter adapter, the housing comprising a distal opening, a proximal opening, and a lumen extending from the distal opening to the proximal opening;
• a hollow body that slides with respect to the housing from a closed position to an open position, wherein the hollow body is at least partially disposed within the housing, wherein the hollow body comprises a distal end, a proximal end, and a passageway extending between the distal end and the proximal end, wherein the hollow body comprises a plurality of holes;
• a first seal coupled to the distal end of the hollow body;
• and
• a second seal coupled to the proximal end of the hollow body, wherein in response to the hollow body being in the closed position, the second seal blocks the proximal opening of the housing and the plurality of holes are disposed within the housing, wherein in response to the hollow body sliding from the closed position to the open position, the plurality of holes are disposed distal to the housing and the second seal is removed from the proximal opening of the housing such that fluid from the lumen of the catheter adapter may flow proximally into the plurality of holes and through the proximal opening of the housing,
• wherein the proximal end of the hollow body comprises a first cam element, wherein the first cam element comprises a first groove, wherein an inner surface of the housing comprises a rail, wherein the septum further comprises:
• a second cam element disposed within the housing and comprising a second groove and a stop surface;
• a spring disposed within the housing and biasing the second cam element proximally against the first cam element,
• wherein when the hollow body is in the closed position, the rail is disposed within the first groove and the second groove and prevents rotation of the second cam element with respect to the first cam element, wherein in response to distal movement of the first cam element and the second cam element such that the rail is removed from second groove, the second cam element rotates such that the rail is not aligned with the second groove, and the stop surface of the second cam element contacts the rail to prevent proximal movement of the second cam element and lock the hollow body in the open position.