Respiration sensor attachment device

1. A respiration sensor cannula device comprising:

a base and a housing, coupled to the base to form first and second nasal flow passages between the housing and the base, the first and second nasal flow passages are aligned in parallel to one another with respect to a nasal respiratory flow direction and form a nasal inlet at a top portion and a nasal outlet at a bottom portion of the cannula device;

the housing comprising first and second openings in an outer surface of the housing, and first and second nasal inhalation flow passages extending from the first and second openings, respectively, wherein the first and second openings are configured to receive a gas from a fluid delivery tube, and direct the gas toward the nasal inlet; and

a first nasal thermistor in the first nasal flow passage, and a second nasal thermistor in the second nasal flow passage.

2. The respiration sensor cannula device of claim 1 , wherein end portions of first and second fluid delivery tubes are fluidly coupled to the first and second openings, respectively, to provide a fluid to a subject's nares.

3. The respiration sensor cannula device of claim 1 , further comprising a cover disposed on the outer surface of the housing, wherein the cover comprises at least one opening configured to receive a portion of the fluid delivery tube.

4. The respiration sensor cannula device of claim 1 , wherein the first and second openings in the outer surface of the housing are configured to receive first and second nasal inhalation flow passages through the first and second openings, respectively.

5. The respiration sensor cannula device of claim 1 , further comprising a placement band coupled to any of the base and the housing, wherein the placement band is configured to position the respiration sensor cannula device on a subject's head.

6. The respiration sensor cannula device of claim 5 , further comprising an engagement pad having a standoff extending between the base and the engagement pad, wherein the housing is coupled to base by slideably engaging a slot in the housing with the standoff.

7. The respiration sensor cannula device of claim 1 , wherein the first and second nasal thermistors extend into each of the first and second nasal exhalation-flow passages, respectively.

8. The respiration sensor cannula device of claim 1 , further comprising a shroud disposed between the housing and the base, wherein the shroud comprises an extension that separates an interior volume between the housing and the base into the first and second nasal flow passages.

9. The respiration sensor cannula device of claim 1 , further comprising an oral flow passage and an oral thermistor, the oral flow passage disposed below the first and second nasal flow passages, the oral respiratory flow direction being transverse to the nasal respiratory flow direction.

10. The respiration sensor cannula device of claim 1 , wherein the first and second nasal inhalation flow passages are formed, at least in part, by a wall that extends from the housing toward the base to define an open top of each of the first and second nasal inhalation flow passages.

11. The respiration sensor cannula device of claim 10 , wherein a cross-sectional area defined by the open top of each of the first and second nasal inhalation flow passages is greater than a cross-sectional area defined by the openings.

12. A respiration sensor mask device comprising:

a base and a housing, coupled to the base to form first and second nasal flow passages between the housing and the base, the housing comprising a connection recess, wherein the first and second nasal flow passages are aligned in parallel to one another with respect to a nasal respiratory flow direction and form a nasal inlet at a top portion and a nasal outlet at a bottom portion of the cannula device, and first and second nasal thermistors are positioned in the first and second nasal flow passages, respectively;

a connection band and a connection member extending from the connection band, wherein the connection member is configured to couple with the connection recess; and

a respiration mask coupled between the connection band and the housing.

13. The respiration sensor mask device of claim 12 , wherein the first and second nasal thermistors extend into each of the first and second nasal flow passages, respectively.

14. The respiration sensor mask device of claim 12 , further comprising an oral flow passage and an oral thermistor, the oral flow passage disposed below the first and second nasal flow passages, the oral respiratory flow direction being transverse to the nasal respiratory flow direction.

15. The respiration sensor mask device of claim 12 , wherein the connection band is configured to be disposed outside of an exterior surface of the respiration mask and the connection band is shaped to curve around at least a portion of an opening in the respiration mask.

16. A method of using a respiration sensor device with a fluid delivery device, the method comprising:

placing the respiration sensor device on a subject, the respiration sensor device having a base and a housing, the housing coupled to the base to form first and second nasal flow passages, between the housing and the base, that are disposed in parallel to one another with respect to a nasal respiratory flow direction and form a nasal inlet at a top portion and a nasal outlet at a bottom portion of the cannula device;

positioning the respiration sensor device so that first and second nasal thermistors in the respective first and second nasal flow passages receive exhalations from the subject's nares;

connecting the fluid delivery device to the respiration sensor device, wherein the respiration sensor device and the fluid delivery device are disposed as a unit on the subject's face, and wherein the fluid delivery device comprises any of a nasal cannula assembly or a respiration mask; and

replacing the fluid delivery device with the other of the nasal cannula assembly or the respiration mask without removing the respiration sensor device from the subject.

17. The method of claim 16 , wherein the respiration mask comprises coupling a connection band to the housing of the respiration sensor device with the respiration mask positioned between the respiration sensor device and the connection band.

18. The method of claim 17 , further comprising:

disconnecting the respiration mask from the respiration sensor device by disengaging the connection band from the housing;

removing the respiration mask from the subject's face; and

connecting a nasal cannula assembly to the respiration sensor device by one of:

inserting first and second nasal inhalation flow passages of the nasal cannula assembly into first and second openings in an outer surface of a housing of the respiration sensor device, and

inserting a tube from the nasal cannula assembly into a tube opening of a cover disposed on an outer surface of the housing of the respiration sensor device, wherein the cover directs a fluid flow from the tube into a nasal inhalation flow passage in the housing.

19. The method of claim 16 , wherein connecting the fluid delivery device to the respiration sensor device comprises coupling the respiration mask to a first portion of an engagement pad of the base, and wherein the housing is coupled to a second portion of the engagement pad.

20. The method of claim 16 , wherein replacing the fluid delivery device comprises separating a delivery tubing from the nasal cannula assembly and coupling the respiration mask to the respiration sensor device without removing a cover and the housing of the respiration sensor device.