Low deadspace airway adapter

A low dead space airway adapter for sampling fluid flowing through a ventilation assembly, the airway adapter comprising:

• a first outer wall configured to couple to an endotracheal (ET) tube adapter, the first outer wall defining a first internal cavity;
• a second outer wall configured to couple to a flow sensor or a ventilation tube connector, the second outer wall defining a second internal cavity;
• a barrier wall positioned between the first and second internal cavities of the first and second outer walls, the barrier wall comprising a barrier wall opening;
• a first internal projection positioned within the first internal cavity defined by the first outer wall and spaced from an interior surface of the first outer wall, the first internal projection extending outward from the barrier wall and extending around an entirety of said barrier wall opening, the first internal projection extending beyond a free end of the first outer wall and configured to extend into an internal cavity of the ET tube adapter when the first outer wall is coupled to the ET tube adapter, the first internal projection comprising:
• a first end connected to the barrier wall;
• a second end opposite the first end;
• a first fluid passageway extending between the first and second ends;
• and
• an opening at the second end, wherein the opening of the first internal projection is in fluid communication with the first fluid passageway and the barrier wall opening and wherein the second end of the first internal projection is chamfered around an entirety of the opening of the first internal projection;
• and
• a sampling portion comprising at least one fluid passageway in fluid communication with the first fluid passageway and the barrier wall opening, the sampling portion configured to allow sampling of a portion of fluid flowing through the first fluid passageway when the airway adapter is in use;
• wherein the first internal projection is neither compressible nor extendable;
• and
• wherein the airway adapter further comprises a second internal projection positioned within the second internal cavity defined by the second outer wall and spaced from an interior surface of the second outer wall, the second internal projection extending outward from the barrier wall in an opposite direction as the first internal projection and extending around the entirety of said barrier wall opening.

A low dead space airway adapter for sampling fluid flowing through a ventilation assembly, the airway adapter comprising:

• a first outer wall configured to couple to an endotracheal (ET) tube adapter, the first outer wall defining a first internal cavity;
• a second outer wall configured to couple to a flow sensor or a ventilation tube connector, the second outer wall defining a second internal cavity;
• a barrier wall positioned between the first and second internal cavities of the first and second outer walls, the barrier wall comprising a barrier wall opening;
• a first internal projection positioned within the first internal cavity defined by the first outer wall, the first internal projection extending outward from the barrier wall and extending at least partially around said barrier wall opening, the first internal projection configured to extend into an internal cavity of the ET tube adapter when the first outer wall is coupled to the ET tube adapter, the first internal projection comprising:
• a first end connected to the barrier wall;
• a second end opposite the first end;
• a first fluid passageway extending between the first and second ends;
• and
• an opening at the second end, wherein the opening of the first internal projection is in fluid communication with the first fluid passageway and the barrier wall opening and wherein the second end of the first internal projection is at least partially chamfered around the opening of the first internal projection;
• wherein the first internal projection is neither compressible nor extendable;
• and
• wherein the airway adapter further comprises a second internal projection positioned within the second internal cavity defined by the second outer wall, the second internal projection extending outward from the barrier wall in an opposite direction as the first internal projection and extending at least partially around said barrier wall opening.