# US 2019/0167928 A1 · Medical device for the closed-circuit administration of a gaseous mixture to a spontaneously breathing patient, and associated adjustment system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167928 A1 - Document ID: US20190167928A1 - Status: Published application - Kind: A1 - Application number: 16/325,448 - Filed: 2016-08-25 - Published: 2019-06-06 - Earliest claimed: 2016-08-25 - Assignees: Monatomics Technology - Applicants: Monatomics Technology - Inventors: Hélène DAVID - Web page: https://patentgrep.com/patent/US20190167928A1 ## CPC - A61M 16/0045: {Means for re-breathing exhaled gases, e.g. for hyperventilation treatment} - A61M 16/0051: {with alarm devices} - A61M 16/0057: {Pumps therefor} - A61M 16/024: {including calculation means, e.g. using a processor} - A61M 16/0891: {Closed circuit, e.g. for anaesthesia} - A61M 16/1005: {with O2 features or with parameter measurement} - A61M 16/1075: {by influencing the temperature (A61M16/1045 takes precedence)} - A61M 16/12: by mixing different gases - A61M 16/22: Carbon dioxide-absorbing devices {; Other means for removing carbon dioxide}(cartridges with absorbing substances for respiratory apparatus A62B19/00) - A61M 19/00: Local anaesthesia (syringes therefor A61M5/00); Hypothermia (A61M5/42 takes precedence; cooling blood in a bypass of the arterial system A61M1/36) - A61M 16/0069: {the speed thereof being controlled by respiratory parameters, e.g. by inhalation} - A61M 16/0078: {Breathing bags} - A61M 16/0627: {with sealing means on a part of the body other than the face, e.g. helmets, hoods or domes} - A61M 16/105: {Filters (A61M16/047, A61M16/22 take precedence; water traps A61M16/08)} - A61M 16/203: {Proportional} - A61M 16/208: {Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves} - A61M 16/209: {Relief valves} - A61M 2016/0027: {pressure meter} - A61M 2016/1025: {the O2 concentration} - A61M 2016/103: {the CO2 concentration} - A61M 2016/1035: {the anaesthetic agent concentration} - A61M 2202/0208: Oxygen - A61M 2202/0225: Carbon oxides, e.g. Carbon dioxide - A61M 2202/025: Helium - A61M 2202/0291: Xenon - A61M 2205/3327: Measuring - A61M 2205/3331: Pressure; Flow - A61M 2205/3368: Temperature - A61M 2205/3606: cooled - A61M 2205/366: by liquid heat exchangers - A61M 2205/505: Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches - A61M 2230/40: Respiratory characteristics - A61M 2230/42: Rate - 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 medical device (1) for the closed-circuit administration of a gaseous mixture to be delivered to a spontaneously breathing patient, comprising a gas recycling system (4) disposed on a closed administration circuit (2). The recycling system (4) can comprise in particular an input for an exhaled gaseous mixture and an output for the gaseous mixture to be supplied to the patient, the orientation of which defines a direction of circulation (8) from the input to the output, as well as a zone (Z1) for treating the exhaled gaseous mixture (5) capable of retaining carbon dioxide, as well as at least one zone (Z3) for adjusting the composition of the gaseous mixture, in which zone the concentration of each gas forming the gaseous mixture is adjusted to a setpoint value. ## Claims ### Claim 1 Recycling system for a medical device for administering a gaseous mixture (4), mean to equip a closed administration circuit (2) with a gaseous mixture to be delivered to a spontaneously breathing patient, the recycling system (4) comprising: an input for an exhaled gaseous mixture and an output for the gaseous mixture to be supplied, the orientation of which defines a direction of circulation (8) from the input to the output, a zone (Z1) for treating the gaseous mixture exhaled housing a compound (5) capable of retaining carbon dioxide, characterized in that it comprises at least one zone (Z3) for adjusting the composition of the gaseous mixture, in which zone the concentration of each gas forming the gaseous mixture is adjusted to a setpoint value. ### Claim 2 (depends on 1) Recycling system (4) according to claim 1, characterized in that the zone (Z3) for adjusting the composition of the gaseous mixture comprises at least one ventilator (7). ### Claim 3 (depends on 2) Recycling system (4) according to claim 2, characterized in that the at least one ventilator (7) has a variable speed. ### Claim 4 (depends on 3) Recycling system (4) according to claim 3, characterized in that the at least one ventilator (7) is controlled based on the patient's rhythm and/or effort when inhaling. ### Claim 5 (depends on 1) Recycling system (4) according to claim 1, characterized in that the zone (Z3) for adjusting the composition of the gaseous mixture comprises admission orifices allowing the different gases forming the gaseous mixture to be injected into the recycling system (4) in order to adjust the composition of the gaseous mixture exhaled by the patient to the setpoint values defined for each gas forming the gaseous mixture. ### Claim 6 (depends on 1) Recycling system (4) according to claim 1, characterized in that it comprises a filtration zone (Z2) housing a mechanism (6) for retaining particles of the compound (5). ### Claim 7 (depends on 1) Recycling system (4) according to claim 1, in which the treatment zone (Z1) and the filtration zone (Z2) are situated upstream of the zone (Z3) for adjusting the composition of the gaseous mixture in relation to the direction of circulation (8). ### Claim 8 (depends on 7) Recycling system (4) according to claim 7, characterized in that it successively comprises, according to the direction of circulation (8), the treatment zone (Z1), the filtration zone (Z2), the zone (Z3) for adjusting the composition of the gaseous mixture and a heat exchange zone (Z4). ### Claim 9 (depends on 1) Closed circuit (2) for administering a gaseous mixture to be delivered to a spontaneously breathing patient, comprising a recycling system (4) defined according to claim 1. ### Claim 10 (depends on 9) Closed administration circuit (2) according to claim 9, wherein the administration circuit (2) comprises at least one enclosure (14a, 14b) delimited by a supple, deformable wall. ### Claim 11 (depends on 10) Closed administration circuit (2) according to claim 10, wherein the at least one enclosure (14b) is disposed downstream of the recycling system (4) according to the direction of circulation (8) of the gaseous mixture inside the administration circuit (2). ### Claim 12 (depends on 10) Closed administration circuit (2) according to claim 10, wherein the administration circuit (2) comprises two enclosures (14a, 14b) disposed on either side of the recycling system (4), a first enclosure (14a) being disposed upstream of the recycling system (4) according to the direction of circulation (8) of the gaseous mixture inside the administration circuit (2), and a second enclosure (14b) being disposed downstream of the recycling system (4) according to the direction of circulation (8) of the gaseous mixture inside the administration circuit (2). ### Claim 13 (depends on 9) Closed administration circuit (2) according to claim 9, characterized in that it comprises a vacuum pump, preferably placed as close as possible to the output of the mechanism for administering the gaseous mixture. ### Claim 14 Medical device (1) for the closed-circuit administration of a gaseous mixture to a spontaneously breathing patient, comprising a gas recycling system disposed on a closed administration circuit. ### Claim 15 (depends on 9) Medical device (1) for the administration of a gaseous mixture to be delivered to a spontaneously breathing patient, characterized in that it comprises a closed administration circuit (2) according to claim 9. ### Claim 16 (depends on 15) Medical device (1) for the administration of a gaseous mixture according to claim 15, characterized in that it comprises at least two feed lines (101, 102) for gas from the recycling system (4). ### Claim 17 (depends on 15) Medical device (1) for the administration of a gaseous mixture according to claim 15, characterized in that one of the feed lines is arranged to feed the closed administration circuit an inert gas for therapeutic purposes, or a mixture of inert gases for therapeutic purposes, this or these inert gas(es) entering individually or in combination with oxygen. ### Claim 18 (depends on 15) Medical device (1) for the administration of a gaseous mixture according to claim 15, characterized in that it comprises an electronic control unit (23) arranged to control a functioning speed of the ventilator (7) using information concerning the patient's rhythm and/or effort when inhaling.