Airway adapters and suction catheter systems

An airway adapter assembly comprising:

• a connector body portion having an elongate cavity, extending between a first end and a second end of the connector body portion, and a flush port coupled to the elongate cavity between the first and second ends of the connector body portion;
• a ventilation base member comprising a tubular portion, extending between a first end and a second end of the ventilation base member, and a ventilator port, the ventilator port comprising a conduit having a first conduit end and a second conduit end, wherein the first conduit end is coupled to the tubular portion through an articulable connection such that the ventilator port is articulable about the tubular portion in at least two axes;
• and
• a valve coupled between the second end of the connector body and the first end of the ventilation base member, the valve comprising an outer rim section configured to engage with a valve retention structure and an inner resiliently flexible diaphragm section integrally connected to the outer rim section, the inner resiliently flexible diaphragm section comprising a plurality of valve segments defined by one or more slits, wherein one or more of the valve segments include one or more first regions and one or more second regions, wherein a primary seal is formed by the plurality of valve segments, and a secondary seal is formed by an arrangement of the one or more first regions of the one or more the valve segments, and wherein the secondary seal has a first cracking pressure, and the primary seal has a second cracking pressure different from the first cracking pressure;
• and wherein the primary seal is larger than the secondary seal such that the primary seal allows insertion of a medical implement to pass therethrough and the first cracking pressure of the secondary seal allows and regulates a small amount of air to pass therethrough.