# US 2016/0354568 A1 · System and method for ventilating lungs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0354568 A1 - Document ID: US20160354568A1 - Status: Published application - Kind: A1 - Application number: 15/171,798 - Filed: 2016-06-02 - Published: 2016-12-08 - Earliest claimed: 2010-03-29 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Tom Jakob Haggblom; Erkki Paavo Heinonen - Web page: https://patentgrep.com/patent/US20160354568A1 ## CPC - A61M 16/0078: {Breathing bags} - A61M 16/0081: {Bag or bellow in a bottle} - A61M 16/024: {including calculation means, e.g. using a processor} - A61M 16/12: by mixing different gases - A61M 16/204: {used for inhalation control} - A61M 16/205: {used for exhalation control} - A61M 16/107: {in the inspiratory path} - A61M 16/22: Carbon dioxide-absorbing devices {; Other means for removing carbon dioxide}(cartridges with absorbing substances for respiratory apparatus A62B19/00) - A61M 2016/0015: {inhalation detectors} - A61M 2016/0021: {with a proportional output signal, e.g. from a thermistor} - A61M 2016/0027: {pressure meter} - A61M 2016/0042: {in the expiratory circuit} - A61M 2205/502: User interfaces, e.g. screens or keyboards - 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 system for ventilating lungs of a subject is disclosed herein. The system includes a control unit configured to control operation of the system. The system also includes a machine ventilator circuit configured to assist the breathing functions of the subject, the machine ventilator circuit includes an inspiration delivery unit, and an expiration circuit. The system also includes a manual ventilation circuit comprising a manual bag guiding a gas from the manual bag wherein a gas flow is guided out from the manual bag to assist an inspiration phase, a gas flow is received to fill the manual bag during an expiration phase, and wherein the gas flow received to fill the manual bag during the expiration phase at least partially comprises the gas flow guided to assist the inspiration phase. ## Claims ### Claim at position 1 -22. (canceled) ### Claim 23 A system for ventilating lungs of a subject, the system comprising: a control unit configured to control operation of the system; a machine ventilator circuit configured to assist breathing functions of the subject, the machine ventilator circuit comprising an inspiration delivery unit for delivering gas flow along an inspiration branch and an expiration circuit for discharge of an expiration gas along an expiration branch, the expiration circuit comprising an expiration valve; and a manual ventilation circuit in flow connection with the expiration branch, the manual ventilation circuit comprising: a manual bag, wherein a first gas flow is guided out from the manual bag to the expiration branch to assist an inspiration phase, a second gas flow is received to fill the manual bag during an expiration phase; and a first sensor, wherein the first sensor is configured to detect a flow direction inside the manual ventilation circuit and to provide a first signal to the control unit based on the detected flow direction; and wherein the machine ventilator circuit comprises a second sensor, wherein the second sensor is configured to detect the pressure inside the machine ventilation circuit and to provide a second signal to the control unit based on the pressure inside the machine ventilation circuit; wherein the control unit controls the inspiration delivery unit and the expiration circuit in response to the first and second signals and is configured to identify whether the inspiration phase or the expiration phase is active and to guide the expiration valve, when the expiration phase is active, to be in a close position allowing the gas flow towards the manual bag filling it until the second signal indicates to the control unit that the pressure of the manual bag achieves a predetermined pressure after which the control unit is configured to guide the expiration valve to an open position to allow extra gas flow out in order to maintain the predetermined pressure. ### Claim 24 (depends on 23) The system according to claim 23, wherein the machine ventilator circuit and the manual ventilation circuit can be alternatively selected. ### Claim 25 (depends on 23) The system according to claim 23 further comprising: a user interface for entering information while ventilating the subject. ### Claim 26 (depends on 23) The system according to claim 23, wherein direct pneumatic contact is made between the manual bag and the gas flow received to fill the manual bag during the expiration phase. ### Claim 27 (depends on 23) The system according to claim 23 further comprising: a gas mixer configured to supply fresh gas to the subject and a breathing circuit connecting lungs of the subject and the machine ventilator circuit to exchange gas in the lungs. ### Claim 28 (depends on 31) The system according to claim 31, wherein the gas flow received to fill the manual bag during the expiration phase further comprises at least one of the fresh gas supplied by the gas mixer and a gas flow delivered by the inspiration delivery unit, and wherein direct pneumatic contact is made between the manual bag and the gas flow received to fill the manual bag during the expiration phase. ### Claim 29 (depends on 23) The system according to claim 23, wherein the first sensor is a flow sensor. ### Claim 30 A method for ventilating lungs of a subject with a system comprising a control unit configured to control operation of the system; a machine ventilator circuit configured to assist breathing functions of the subject and comprising an inspiration delivery unit, an expiration circuit for controlling a discharge of expiration gas, wherein expiration circuit includes an expiration valve and a pressure sensor configured to detect the pressure inside the mechanical ventilation circuit; and a manual ventilation circuit comprising a manual bag and a flow direction sensor, the method comprising: increasing pressure to guide a first gas flow to assist an inspiration phase during compression of the manual bag; guiding, with the control unit, a second gas flow that at least partially comprises the gas flow guided to assist the inspiration phase to fill the manual bag during an expiration phase; detecting a flow direction inside the manual ventilation circuit with the flow direction sensor; providing a signal to the control unit with the flow direction sensor based on the detected flow direction to indicate the inspiration phase or the expiration phase; controlling, with the control unit, the inspiration delivery unit, the expiration circuit and the expiration valve of the system in response to the signal; and guiding, with the control unit, a discharge of extra gas volume based on the detected flow direction, when the expiration phase is active, such that the expiration valve is in a closed position allowing gas to flow towards the manual bag filling it at least partly with the extra gas volume if the pressure sensor has not indicated to the control unit that the pressure of the manual bag has achieved a predetermined pressure after which the expiration valve is in an open position to allow the extra gas volume out in order to maintain the predetermined pressure, wherein the extra gas volume is discharged during the expiration phase in order to reach a pressure level of an expiratory pressure, ### Claim 31 (depends on 30) The method according to claim 30 further comprising setting a predetermined pressure level for the expiratory pressure and setting a predetermined pressure level for limiting an inspiratory pressure. ### Claim 32 (depends on 30) The method according to claim 30, wherein filling the manual bag during the expiration phase with a gas flow that at least partially comprises the gas flow guided to assist the inspiration phase creates direct pneumatic contact between the manual bag and the gas flow received to fill the manual bag during the expiration phase. ### Claim 33 (depends on 30) The method according to claim 30, further comprising supplying a gas flow of fresh gas to the subject. ### Claim 34 (depends on 33) The method according to claim 33, wherein filling the manual bag during an expiration phase further comprises the gas flow of fresh gas. ### Claim 35 (depends on 30) The method according to claim 30, wherein the machine ventilator circuit and the manual ventilation circuit can be alternatively selected. ### Claim 36 (depends on 35) The method according to claim 35, wherein the manual ventilation circuit is in gas flow connection with at least a part of the machine ventilator circuit to create a pneumatic contact with the lungs of the subject when the manual ventilation circuit is selected, and the manual ventilation circuit being in gas flow connection with an expiration circuit to achieve a predetermined pressure level under the control of the control unit, the method further comprises: increasing pressure by compressing the manual bag to guide a gas flow to assist an inspiration phase in the manual ventilation circuit and in a part of the machine ventilator circuit in flow communication with the manual ventilation circuit; and releasing the manual bag for an expiration phase. ### Claim 37 (depends on 36) The method according to claim 36, further comprising setting a predetermined pressure level for the expiratory pressure and setting a predetermined pressure level for limiting an inspiratory pressure. ### Claim 38 (depends on 36) The method according to claim 36, wherein filling the manual bag during the expiration phase with a gas flow that at least partially comprises the gas flow guided to assist the inspiration phase creates direct pneumatic contact between the manual bag and the gas flow received to fill the manual bag during the expiration phase.