Needleless connector with reduced trapped volume

A connector comprising:

• a body comprising an internal cavity having a port;
• and
• a collapsible valve disposed within the internal cavity, the valve having distal and proximal ends and comprising:
• a head comprising an external surface disposed at a distal end and a ridge that is proximal to and separated from the external surface;
• a neck coupled to the head proximal to the ridge, the neck comprising a smiley cut;
• and
• a base portion coupled to the neck proximal to the smiley cut,
• wherein the ridge of the valve is in sealing contact with the body so as to form a primary seal when the connector is not mated with a compatible connector.

A female connector comprising:

• a body having distal and proximal ends and comprising an internal cavity with an internal surface, a port at a distal end of the internal cavity, and a ridge formed on the internal surface, the ridge being proximal to and separated from the port;
• and
• a collapsible valve disposed within the internal cavity, the valve having distal and proximal ends and comprising:
• a head comprising an external surface disposed at a distal end and a shoulder proximal to and separated from the external surface;
• a neck coupled to the head proximal to the shoulder, the neck comprising a smiley cut;
• and
• a base portion coupled to the neck proximal to the smiley cut,
• wherein the ridge of the body is in sealing contact with the shoulder so as to create a primary seal when the female connector is not mated with a compatible connector.