# US 11,896,760 B2 · Breathing device, app and interaction therebetween > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,760 B2 - Document ID: US11896760B2 - Status: Granted - Kind: B2 - Application number: 16/637,915 - Filed: 2018-08-23 - Published: 2020-06-11 - Granted: 2024-02-13 - Earliest claimed: 2017-08-23 - Assignees: Rehaler ApS - Applicants: Rehaler APS - Inventors: Troels Johansen; Erik Othel-Jacobsen; Asger Johansen - Web page: https://patentgrep.com/patent/US11896760B2 ## CPC - A61M 16/0045: {Means for re-breathing exhaled gases, e.g. for hyperventilation treatment} - A61M 16/0078: {Breathing bags} - A61M 16/20: Valves specially adapted to medical respiratory devices - A61M 2202/0225: Carbon oxides, e.g. Carbon dioxide - A61M 2205/3334: Measuring or controlling the flow rate - A61M 2230/205: partial oxygen pressure (P-O2) - 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 The invention relates to a breathing device (1), comprising a mouthpiece (2) forming a breathing channel to form a connection between a first (3) end and a second (4) end of the mouthpiece (2). The first (3) end is configured for a user breathing into the mouthpiece through a breathing opening (5). An at least partly flexible rebreathing air chamber (6) is arranged in fluid communication with the second (4) end of the mouthpiece, thereby being in fluid connection with the breathing channel through the second end of the mouthpiece (2). The rebreathing air chamber is formed by at least partly flexible wall section(s). A wall member (7) is arranged at the second (4) end of the mouthpiece and/or attached to the rebreathing air chamber (6). The wall member (7) comprises one or more through-going openings (8) provided in the wall member (7) and/or in the breathing channel, allowing fluid communication between the rebreathing air chamber (6) and the surrounding atmosphere. ## Claims ### Claim 1 A system for adjusting the rebreathing ratio (RBR) of a user, the system comprising: a breathing device comprising: a mouthpiece forming a breathing channel to form a connection between a first end and a second end of the mouthpiece, the first end being configured to accommodate a user breathing into the mouthpiece through a breathing opening; an at least partly flexible rebreathing air chamber arranged in fluid communication with the second end of the mouthpiece, thereby being in fluid connection with the breathing channel through the second end of the mouthpiece, the rebreathing air chamber being formed by at least partly flexible wall section(s); a wall member pivotally connected to the second end of the mouthpiece and forming part of the rebreathing air chamber, said wall member comprising one or more through-going openings provided in the wall member at the second end of the mouthpiece, allowing fluid communication between the rebreathing air chamber and the surrounding atmosphere, said one or more through-going openings being re-closeable or adjustable in size, and a computer configured to automatically determine whether to change the RBR based on the user's response to a questionnaire in data connection with said computer, wherein the system is configured to signal the user to change a setting of the re-closeable or adjustable one or more through-going openings, if when the RBR is determined to be changed by the computer based on the data from the questionnaire. ### Claim 2 (depends on 1) The system according to claim 1, wherein said one or more through-going openings have a first conductance Gout and said rebreathing air chamber being impermeable to gas has a second conductance Gexpand, and wherein the one or more through-going openings and the rebreathing air chamber are configured to provide a RBR defined as RBR Gexpand/(Gout+Gexpand) between 0.5 and 0.95, or between 0.2 and 0.65. ### Claim 3 (depends on 1) The system according to claim 1, wherein the system comprises a nose clamp comprising a bendable elongated strip and a coating surrounding the strip on all sides. ### Claim 4 A method for adjusting the rebreathing ratio (RBR) of a breathing device with an adjustable RBR and a computer configured to automatically determine whether to change the RBR based on a user's response to a questionnaire, the method comprising: providing a breathing device comprising: a mouthpiece forming a breathing channel to form a connection between a first end and a second end of the mouthpiece, the first end being configured for a user breathing into the mouthpiece through a breathing opening; an at least partly flexible rebreathing air chamber arranged in fluid communication with the second end of the mouthpiece, thereby being in fluid connection with the breathing channel through the second end of the mouthpiece, the rebreathing air chamber being formed by at least partly flexible wall section(s); a wall member pivotally connected to the second end of the mouthpiece and forming part of the rebreathing air chamber; one or more through-going openings provided in the wall member at the second end of the mouthpiece, allowing fluid communication between the rebreathing air chamber and the surrounding atmosphere, said one or more through-going openings being re-closeable or adjustable in size; the user breathing through the breathing device; executing a questionnaire containing questions relating to the user's response to the use of the breathing device during use of the breathing device, in response thereto determining by use of the computer whether to change the RBR, and when the RBR is determined to be changed, signalling to the user a new setting for the breathing device. ### Claim 5 (depends on 4) The method according to claim 4, wherein the RBR is changed via a setting of a slider position, each setting corresponding to a specific position of member at the second end of the mouthpiece to cover a portion of the one or more through-going openings. ### Claim 6 (depends on 4) The method for adjusting the RBR according to claim 4, wherein a kit of parts is utilized and said kits of parts comprises: the breathing device; and a SpO2-sensor measuring an arterial oxygenation value of the user and a CO2 sensor fluidly connected to the breathing device, the SpO2 sensor and the CO2 sensor being in data connection with the computer. ### Claim 7 (depends on 4) The method for adjusting the RBR according to claim 4, wherein the computer is a smartphone. ### Claim 8 (depends on 4) The method for adjusting the RBR according to claim 4, wherein the computer is a tablet or a smartphone. ### Claim 9 (depends on 4) The method for adjusting the RBR according to claim 4, wherein the computer has a number of pre-stored baseline settings, each setting corresponding to a slider position or a number of said one or more through-going openings being closed. ### Claim 10 (depends on 4) The method for adjusting the RBR according to claim 4, wherein the computer has a number of pre-stored baseline settings, each setting corresponding to a geographical position. ### Claim 11 (depends on 4) The method for adjusting the RBR according to claim 4, wherein the computer has a number of pre-stored baseline settings, each setting corresponding to previous changes in the RBR or user data including gender, age and type of disease.