High flow, needleless connector

An injection port assembly, comprising:

• a body including a first mating structure and a second mating structure configured to be coupled to the first mating structure, the body having a central body axis extending from a distal body end defined on the first mating structure to a proximal body end defined on the second mating structure;
• the first mating structure including:
• an annular wall defining an open proximal end of the first mating structure facing toward the proximal body end;
• a male luer connection including an axial passage extending from a distal end of the male luer connection toward the proximal body end;
• and
• an internal passage communicating the open proximal end of the first mating structure with the axial passage of the male luer connection;
• the second mating structure including a female luer connection configured to receive a male luer fitting, the second mating structure having an interior wall defining an interior communicating the female luer connection with the open proximal end of the first mating structure;
• and
• a flexible valve member including:
• a proximal valve end portion configured to be sealingly received in the female luer connection of the second mating structure when the flexible valve member is in a closed position;
• an axially extending main body portion;
• a tapered distal end portion extending distally from the main body portion and configured to engage the first mating structure;
• a tapered proximal portion extending proximally from the main body portion to the proximal valve end portion, the tapered proximal portion being axially longer than the tapered distal end portion;
• a plurality of stabilizing fins extending laterally outward from the main body portion toward the interior wall of the second mating structure;
• and
• wherein the tapered proximal portion is configured to buckle asymmetrically relative to the central body axis upon entry of the male luer fitting into the female luer connection to thereby place the male luer fitting in communication with the interior of the second mating structure.