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An adapter includes a housing having an inlet port defining a flow path and an outlet port. An interior wall has an inner surface defining an interior passageway communicating with the outlet port and an exterior surface defining an exterior passageway communicating with the inlet port. The interior

An adapter includes a housing having an inlet port defining a flow path and an outlet port. An interior wall has an inner surface defining an interior passageway communicating with the outlet port and an exterior surface defining an exterior passageway communicating with the inlet port. The interior wall defines a mouth communicating between the interior and the exterior passageways. The interior wall is positioned transverse to the flow path of the inlet port. A medicament delivery port opens into the mouth. A valve is moveable between a closed position, wherein the valve closes the medicament delivery port, and an open position, wherein the medicament delivery port is open. A ventilator circuit and method of delivering a medicament are also provided.

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1. An adapter housing comprising: an inlet port defining a flow path;an outlet port;an interior wall having an inner surface defining an interior passageway communicating with said outlet port and an exterior surface defining an exterior passageway communicating with said inlet port, and wherein sai

1. An adapter housing comprising: an inlet port defining a flow path;an outlet port;an interior wall having an inner surface defining an interior passageway communicating with said outlet port and an exterior surface defining an exterior passageway communicating with said inlet port, and wherein said interior wall defines a mouth communicating between said interior and said exterior passageways, wherein said interior wall is positioned substantially transverse to at least a portion of said flow path of said inlet port, and wherein said exterior passageway is in fluid communication with said outlet port only through said interior passageway;a medicament delivery port opening into at least one of said exterior passageway and said interior passageway; anda valve moveable between a closed position wherein said valve closes said medicament delivery port and an open position wherein said medicament delivery port is open. 2. The adapter housing of claim 1 wherein said exterior passageway extends around an entire periphery of said internal wall. 3. The adapter housing of claim 2 wherein said exterior passageway extends 360 degrees around said internal wall. 4. The adapter housing of claim 1 wherein said valve comprises a spring biasing said valve to said closed position. 5. The adapter housing of claim 1 wherein said internal wall extends orthogonal to said flow path. 6. The adapter housing of claim 1 wherein said internal wall forms an acute angle relative to said flow path. 7. The adapter housing of claim 1 wherein said valve comprises an actuator having at least one side opening formed therein. 8. The adapter housing of claim 7 wherein said actuator comprises a plurality of arms defining a plurality of side openings therebetween. 9. An adapter housing comprising: an inlet port defining a flow path;an outlet port;an interior wall having an inner surface defining an interior passageway communicating with said outlet port and an exterior surface defining an exterior passageway communicating with said inlet port, and wherein said interior wall defines a mouth communicating between said interior and said exterior passageways, wherein said interior wall is positioned substantially transverse to at least a portion of said flow path of said inlet port;a medicament delivery port opening into at least one of said exterior passageway and said interior passageway; anda valve moveable between a closed position wherein said valve closes said medicament delivery port and an open position wherein said medicament delivery port is open, wherein said valve comprises an actuator having at least one side opening formed therein, wherein said actuator comprises a first engagement surface adapted to engage a first medicament delivery device and a second engagement surface adapted to engage a second medicament delivery device. 10. An adapter housing comprising: an inlet port defining a flow path;an outlet port;an interior wall having an inner surface defining an interior passageway communicating with said outlet port and an exterior surface defining an exterior passageway communicating with said inlet port, and wherein said interior wall defines a first mouth communicating between said interior and said exterior passageways, wherein said interior wall is positioned substantially transverse to at least a portion of said flow path of said inlet port, and wherein said interior wall further defines a second mouth communicating between said interior and said exterior passageway opposite said first mouth;a first medicament delivery port opening into at least one of said exterior passageway and said interior passageway;a second medicament delivery port opening into said second mouth;a first valve moveable between a closed position wherein said first valve closes said first medicament delivery port and an open position wherein said first medicament delivery port is open; anda second valve moveable between a closed position wherein said second valve closes said second medicament delivery port and an open position wherein said second medicament delivery port is open. 11. The adapter housing of claim 10 wherein said second valve is in a closed position when said first valve is in an open position, and wherein said first valve is in a closed position when said second valve is in an open position. 12. A ventilator circuit comprising: an oxygen supply;a user interface; andan adapter comprising:an inlet port defining a flow path and in flow communication with said oxygen supply;an outlet port in flow communication with said user interface;an interior wall having an inner surface defining an interior passageway communicating with said outlet port and an exterior surface defining an exterior passageway communicating with said inlet port, and wherein said interior wall defines a mouth communicating between said interior and said exterior passageways, wherein said interior wall is positioned substantially transverse to at least a portion of said flow path of said inlet port, and wherein said exterior passageway is in fluid communication with said outlet port only through said interior passageway;a medicament delivery port opening into at least one of said exterior passageway and said interior passageway; anda valve moveable between a closed position wherein said valve closes said medicament delivery port and an open position wherein said medicament delivery port is open. 13. The ventilator circuit of claim 12 wherein said exterior passageway extends around an entire periphery of said internal wall. 14. The ventilator circuit of claim 13 wherein said exterior passageway extends 360 degrees around said internal wall. 15. The ventilator circuit of claim 12 wherein said valve comprises a spring biasing said valve to said closed position. 16. The ventilator circuit of claim 12 wherein said internal wall extends orthogonal to said flow path. 17. The ventilator circuit of claim 12 wherein said internal wall forms an acute angle relative to said flow path. 18. The ventilator circuit of claim 12 wherein said valve comprises an actuator having at least one side opening formed therein. 19. The ventilator circuit of claim 18 wherein said actuator comprises a plurality of arms defining a plurality of side openings therebetween. 20. The ventilator circuit of claim 12 further comprising a medicament delivery device communicating with said medicament delivery port. 21. A ventilator circuit comprising: an oxygen supply;a user interface; andan adapter comprising:an inlet port defining a flow path and in flow communication with said oxygen supply;an outlet port in flow communication with said user interface;an interior wall having an inner surface defining an interior passageway communicating with said outlet port and an exterior surface defining an exterior passageway communicating with said inlet port, and wherein said interior wall defines a mouth communicating between said interior and said exterior passageways, wherein said interior wall is positioned substantially transverse to at least a portion of said flow path of said inlet port;a medicament delivery port opening into at least one of said exterior passageway and said interior passageway; anda valve moveable between a closed position wherein said valve closes said medicament delivery port and an open position wherein said medicament delivery port is open, wherein said valve comprises an actuator having at least one side opening formed therein, wherein said actuator comprises a first engagement surface adapted to engage a first medicament delivery device and a second engagement surface adapted to engage a second medicament delivery device. 22. A ventilator circuit comprising: an oxygen supply;a user interface; andan adapter comprising:an inlet port defining a flow path and in flow communication with said oxygen supply;an outlet port in flow communication with said user interface;an interior wall having an inner surface defining an interior passageway communicating with said outlet port and an exterior surface defining an exterior passageway communicating with said inlet port, and wherein said interior wall defines a first mouth communicating between said interior and said exterior passageways, wherein said interior wall is positioned substantially transverse to at least a portion of said flow path of said inlet port, and wherein said interior wall further defines a second mouth communicating between said interior and said exterior passageway opposite said first mouth;a first medicament delivery port opening into at least one of said exterior passageway and said interior passageway;a second medicament delivery port opening into said second mouth;a first valve moveable between a closed position wherein said first valve closes said first medicament delivery port and an open position wherein said first medicament delivery port is open; anda second valve moveable between a closed position wherein said second valve closes said second medicament delivery port and an open position wherein said second medicament delivery port is open. 23. The ventilator circuit of claim 22 wherein said second valve is in a closed position when said first valve is in an open position, and wherein said first valve is in a closed position when said second valve is in an open position.