# US 11,077,282 B2 · Method and apparatus for humidification of breathable gas with profiled delivery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,282 B2 - Document ID: US11077282B2 - Status: Granted - Kind: B2 - Application number: 16/251,054 - Filed: 2019-01-17 - Published: 2019-05-23 - Granted: 2021-08-03 - Earliest claimed: 2004-08-10 - Assignees: ResMed Pty Ltd - Applicants: ResMed Pty Ltd - Inventors: Philip Rodney Kwok - Web page: https://patentgrep.com/patent/US11077282B2 ## CPC - A61M 16/161: {with means for measuring the humidity} - A61M 16/0003: {Accessories therefor, e.g. sensors, vibrators, negative pressure} - A61M 16/0051: {with alarm devices} - A61M 16/0066: {Blowers or centrifugal pumps} - A61M 16/024: {including calculation means, e.g. using a processor} - A61M 16/109: {the humidifying liquid or the beneficial agent} - A61M 16/16: Devices to humidify the respiration air {(A61M16/1045 takes precedence)} - A61M 16/20: Valves specially adapted to medical respiratory devices - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A humidifying system is configured to humidify pressurized breathable gas. The humidifying system includes a housing configured to couple to a blower that is adapted to supply pressurized breathable gas to provide continuous positive airway pressure (CPAP) treatment to a patient. The humidifying system also includes a tub adapted to hold a volume of water and a heater element to heat the volume of water. A controller is configured to select a humidity profile from a plurality of humidity profiles based on ambient conditions that occurred during a previous treatment session. Each of the plurality of humidity profiles presets a respective target humidity level of the pressurized breathable gas for a respective treatment session. ## Claims ### Claim 1 A humidifying system configured to humidify pressurized breathable gas, the humidifying system comprising: a housing configured to couple to a blower that is adapted to supply pressurized breathable gas to provide continuous positive airway pressure (CPAP) treatment to a patient; a tub adapted to hold a volume of water; a heater element to heat the volume of water; and a controller configured to select, from a plurality of humidity profiles, a humidity profile that has been previously used under ambient environment conditions that are anticipated to occur during the treatment session, wherein each of the plurality of humidity profiles presets a respective target humidity level of the pressurized breathable gas for a respective treatment session. ### Claim 2 (depends on 1) The humidifying system of claim 1, wherein the controller is configured so that during a current treatment session, the controller adjusts the preset target humidity level of the selected humidity profile in response to ambient conditions that occur during the current treatment session. ### Claim 3 (depends on 2) The humidifying system of claim 2, wherein the ambient conditions that occur during the current treatment session include at least one of ambient humidity and ambient temperature. ### Claim 4 (depends on 2) The humidifying system of claim 2, wherein the controller is configured to adjust the preset target humidity level of the selected humidity profile on a breath-by-breath basis in response to ambient conditions. ### Claim 5 (depends on 4) The humidifying system of claim 4, wherein the ambient conditions include at least one of ambient humidity and ambient temperature. ### Claim 6 (depends on 1) The humidifying system of claim 1, wherein the controller is configured to adjust the preset target humidity level of the selected humidity profile based on the time of year. ### Claim 7 (depends on 1) The humidifying system of claim 1, wherein the controller is configured to adjust the preset target humidity level of the selected humidity profile based on the time of day. ### Claim 8 (depends on 1) The humidifying system of claim 1, wherein the controller is configured to modify the selected humidity profile according to a temperature of the room over the course of the treatment session. ### Claim 9 (depends on 1) The humidifying system of claim 1, wherein the controller is configured to adjust the selected humidity profile based on temperature and time measurements. ### Claim 10 (depends on 1) The humidifying system of claim 1, wherein the selected humidity profile is configured to change over a set time period of treatment. ### Claim 11 (depends on 1) The humidifying system of claim 1, wherein the selected humidity profile comprises a plurality of preset target humidity levels. ### Claim 12 (depends on 11) The humidifying system of claim 11, wherein the each of the plurality of preset humidity target levels corresponds to a time of day. ### Claim 13 (depends on 11) The humidifying system of claim 11, wherein the each of the plurality of preset humidity target levels corresponds to a respective time index within a current treatment session. ### Claim 14 A humidifying system configured to humidify pressurized breathable gas, the humidifying system comprising: a housing configured to couple to a blower that is adapted to supply pressurized breathable gas to provide continuous positive airway pressure (CPAP) treatment to a patient; a tub adapted to hold a volume of water; a heater element to heat the volume of water; and a controller configured to select a humidity profile from a plurality of humidity profiles based on ambient conditions anticipated to occur during a current treatment session, wherein each of the plurality of humidity profiles presets a respective target humidity level of the pressurized breathable gas for a respective treatment session. ### Claim 15 (depends on 14) The humidifying system of claim 14, wherein the controller is configured so that during a current treatment session, the controller adjusts the preset target humidity level of the selected humidity profile in response to ambient conditions that occur during the current treatment session. ### Claim 16 (depends on 15) The humidifying system of claim 15, wherein the ambient conditions that occur during the current treatment session include at least one of ambient humidity and ambient temperature. ### Claim 17 (depends on 15) The humidifying system of claim 15, wherein the controller is configured to adjust the preset target humidity level of the selected humidity profile on a breath-by-breath basis in response to ambient conditions. ### Claim 18 (depends on 17) The humidifying system of claim 17, wherein the ambient conditions include at least one of ambient humidity and ambient temperature. ### Claim 19 (depends on 14) The humidifying system of claim 14, wherein the controller is configured to adjust the preset target humidity level of the selected humidity profile based on the time of year. ### Claim 20 (depends on 14) The humidifying system of claim 14, wherein the controller is configured to adjust the preset target humidity level of the selected humidity profile based on the time of day. ### Claim 21 (depends on 14) The humidifying system of claim 14, wherein the controller is configured to modify the selected humidity profile according to a temperature of the room over the course of the treatment session. ### Claim 22 (depends on 14) The humidifying system of claim 14, wherein the controller is configured to adjust the selected humidity profile based on temperature and time measurements. ### Claim 23 (depends on 14) The humidifying system of claim 14, wherein the selected humidity profile is configured to change over a set time period of treatment. ### Claim 24 (depends on 14) The humidifying system of claim 14, wherein the selected humidity profile comprises a plurality of preset target humidity levels. ### Claim 25 (depends on 24) The humidifying system of claim 24, wherein the each of the plurality of preset humidity target levels corresponds to a time of day. ### Claim 26 (depends on 24) The humidifying system of claim 24, wherein the each of the plurality of preset humidity target levels corresponds to a respective time index within the current treatment session.