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WO2014066969A1 - Circuit respiratoire pour appareil d'anesthésie - Google Patents

Circuit respiratoire pour appareil d'anesthésie Download PDF

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Publication number
WO2014066969A1
WO2014066969A1 PCT/BR2013/000465 BR2013000465W WO2014066969A1 WO 2014066969 A1 WO2014066969 A1 WO 2014066969A1 BR 2013000465 W BR2013000465 W BR 2013000465W WO 2014066969 A1 WO2014066969 A1 WO 2014066969A1
Authority
WO
WIPO (PCT)
Prior art keywords
anesthesia apparatus
patient
gas mixture
flow
gas
Prior art date
Application number
PCT/BR2013/000465
Other languages
English (en)
Portuguese (pt)
Other versions
WO2014066969A8 (fr
Inventor
Toru MIYAGI KINJO
Wataru Ueda
Tatsuo Suzuki
Original Assignee
Magnamed Tecnologia Médica S/A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Magnamed Tecnologia Médica S/A filed Critical Magnamed Tecnologia Médica S/A
Publication of WO2014066969A1 publication Critical patent/WO2014066969A1/fr
Publication of WO2014066969A8 publication Critical patent/WO2014066969A8/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes specially adapted for anaesthetising
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0883—Circuit type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0066—Blowers or centrifugal pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/0057—Pumps therefor
    • A61M16/0078—Breathing bags
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0883—Circuit type
    • A61M16/0891—Closed circuit, e.g. for anaesthesia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/18—Vaporising devices for anaesthetic preparations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A61M16/209—Relief valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/22—Carbon dioxide-absorbing devices ; Other means for removing carbon dioxide

Definitions

  • the present invention relates to an anesthesia circuit used in inhalation anesthesia apparatus having no gas stagnation points as it utilizes a turbine and a pressure control valve in addition to a long tube reservoir. in contact with outside air.
  • the patient In various types of surgery, the patient should be cured to avoid muscle contractions that may hinder or cause accidents during the operation.
  • the use of respiratory circuits in anesthesia devices is indispensable, since they allow the breathing of anesthetized patients with total paralysis of the muscles, and therefore without control of their respiratory system.
  • Anesthesia devices generally comprise a part called the continuous flow section and another part called the breathing circuit.
  • the continuous flow section is the section of the circuit in which gases, usually oxygen, nitrous oxide or air, are dosed and mixed, and then conveyed to the calibrated vaporizer, where anesthetic is added, thereby forming a fresh gas flow.
  • the breathing circuit is the place where the patient's breathing cycle is generated.
  • the continuous flow section generally comprises rotameters and an anesthetic vaporizer
  • the respiratory circuit generally comprises an inspiratory valve connected to an inspiratory branch, an expiratory valve connected to an expiratory branch, a Y-piece in contact. with the inspiratory branch and the expiatory branch, as well as the patient's respiratory system, a balloon / ventilator toggle switch, a balloon, a soda lime filter, a pressure limit valve, a bell comprising a ventilator-operated bellows external.
  • the gas flow is intermittent, so that the patient You should inhale a mixture of anesthetic gases with oxygen, and exhale a mixture of residual oxygen, residual anesthetic in addition to the carbon dioxide produced in your lungs.
  • the patient is induced to the anesthesia state, usually manually, with the balloon / ventilator switch in the "balloon" position.
  • This process is called induction, in which the anesthesiologist pumps the gas mixture through the balloon with a high anesthetic concentration (up to 8% volumetric) until the patient is unconscious.
  • the anesthetic concentration is reduced to a maintenance level of the anesthetic plane (usually to about 2%, depending on the patient and anesthetic agent), and device-controlled respiration is initiated upon modification. the position of the balloon / fan switch switch to the "fan" position.
  • the patient's exhaled gas should be filtered to remove carbon dioxide, and fresh gas should be added to the remainder of the gas mixture, replenishing the oxygen consumed by the patient's breath, to be subsequently returned to the gas. patient's lung, thus taking advantage of anesthetic gases and residual breathing oxygen.
  • conventional anesthesia systems generally utilize a cyclic breathing circuit, called the rebreathing circular breathing circuit, wherein the carbon dioxide from the gas mixture within the circuit is withdrawn via the soda lime filter and the rest - te of the gas mixture is recirculated.
  • the gas exhaled by the patient is directed into the bellows, which is a passive element mounted within the bell.
  • the bellows inflates (rises) as the exhaled gas enters.
  • a renewed gas mixture inflates the patient's lungs by injecting propellant gas into the bell, outside the bellows, through the external ventilator, thereby deflating the bellows (pushing the gas from the bellows downward) and forming a flow of the gas mixture, which passes through the soda lime filter, where the carbon dioxide is absorbed, and is then directed to the patient.
  • an external fan is required, which generates the propulsion gas to propel the bellows.
  • Another type of anesthesia device uses, instead of the bell and bellows, a cylinder and piston system, which has a piston coupled to a spindle and a motor (linear actuator).
  • This system generates the breathing cycle, using electricity as a source of energy for motor movement.
  • this system does not comprise an external fan, as the breathing cycle is generated by the piston.
  • U.S. Patent 4,989,597 discloses a breathing circuit in which instead of bellows and bell uses a pressure transmission system, called the inventor of a exchanger, made of corrugated tube, between the external fan and the gases of the circuit. anesthesia, avoiding dilution of anesthetic gases. This system, however, does not eliminate the need for an external fan.
  • the volume of anesthetic gases stagnant in the circuit is large, and there is a long delay in the renewal of the gas. anesthetic gas mixture co in the circuit.
  • the anesthetist changes the anesthetic concentration in the vaporizer, the gas stagnation points due to the presence of large residual bellows volumes such as; reservoir or piston jacket, this change does not occur immediately in patient-inspired gases.
  • anesthesia superficialization which is usually detected by the increase of blood pressure and heart rate, being signs of stress caused by the pain felt by the patient, which can have irreversible consequences such as post-neurological disorders.
  • -surgists who manifest in various ways. Decreasing anesthetic concentration in the circuit is therefore desirable, but a superficial anesthetic should be corrected as soon as possible given the first sign of stress. In the prior art, however, such correction is performed by increasing the anesthetic concentration of fresh gas in the vaporizer, however the result is only appreciated after a long period of stabilization of the new plateau.
  • a first object of the present invention is to provide a breathing circuit for anesthesia apparatus which has few building elements, reducing production and maintenance costs.
  • anesthesia Apparatus comprising at least one rotameter, connected to an anesthetic vaporizer, which is connected to contact elements with a patient's respiratory system.
  • the breathing system contact elements are connected to a toggle switch, which in turn is connected to a balloon connected to a carbon dioxide filter.
  • This carbon dioxide filter is also connected to the anesthetic vaporizer.
  • the anesthesia apparatus further comprises a turbine connected to the carbon dioxide filter, the balloon and a long tube reservoir, which is connected to the toggle switch.
  • the anesthesia apparatus according to the present invention is configured to create a flow of a gas mixture towards the patient's respiratory system.
  • a respiratory circuit for an anesthesia apparatus comprising contact elements with a patient's respiratory system, and further comprising a turbine, connected to a long tube reservoir.
  • the breathing circuit is configured to create a flow of a gas mixture toward the patient's respiratory system.
  • Figure 1 is a representation of the state of the art anesthesia apparatus
  • Figure 2 is a representation of a preferred embodiment of the present invention showing the inspiration cycle in the induction phase
  • Figure 3 is a representation of a preferred embodiment of the present invention showing the expiration cycle in the induction phase
  • Figure 4 is a representation of a preferred embodiment of the present invention showing the inspiratory cycle in the apparatus controlled breathing phase
  • Figure 5 is a representation of a preferred embodiment of the present invention showing the expiration cycle in the apparatus controlled breathing phase.
  • Figure 1 presents a representation of the state of the art anesthesia apparatus.
  • state-of-the-art anesthesia devices comprise a part called a continuous flow section and a part called a respiratory circuit.
  • the breathing circuit section comprises tubes or ducts that interconnect a bell 13 comprising a bellows 12, a soda lime filter 11, and contact elements with a patient's breathing system, which are preferably an inspiratory valve 3 connected to a bell. inspiratory branch 4, an expiratory valve 7 connected to an expiratory branch 6 and a Y-piece 5 in contact with the inspiratory branch 4, the expiatory branch 6, and the patient's respiratory system. Additionally, the breathing circuit section comprises an external ventilator 14 configured for generate the inspiratory and expiratory cycles that propel the bellows 12 by inserting air into the bell 13.
  • the breathing circuit section further comprises a manual breathing system having a balloon 10, a pressure limit valve 9 and a toggle switch 8, also called a balloon / ventilator switch.
  • vaporizer 7 which may be a simple anesthetic evaporator which vaporizes a predetermined amount of liquid to the amount of gases to provide the respiratory circuit with the exact anesthetic concentration adjusted by the anesthetist, in the form of a gas mixture flow, or fresh gas flow 23.
  • the gas exhaled by the patient is directed into the bellows 12, which is a passive element, mounted within the bell 13.
  • the gases from the patient's lungs are expelled by the Y 5 piece into the ramus. 6, passing also through the expiratory valve 7 and thus reaching the bellows 12, which inflates (rises) with the inlet of the expired gas.
  • a propellant gas is injected into bell 13 outside the bellows 12 via the external fan 14, deflating the bellows 12 (pushing the gas from the bellows 12 downwards), thereby forming the flow of the mixture.
  • the gas mixture flow can also be created by manually inflating or deflating the balloon 10.
  • the entire gas mixture flow is created and directed by the balloon 10 or the external fan 14.
  • Figures 2 to 5 illustrate a representation of the preferred embodiment of the present invention which further comprises at least one parameter 1, connected to the anesthetic vaporizer 2, the contact elements with the patient's respiratory system (the inspiratory valve 3). , the inspiratory branch 4, the Y-piece 5, the expiatory branch 6, the expiratory valve 7), the toggle switch 8, pressure limit valve 9, balloon 10 and soda lime filter 11, preferably a soda lime filter.
  • the present invention comprises a turbine 18, which may be a respirator turbine, and a long laminar flow tube 19, and possibly comprises an electronically controlled pressure control valve, one-way valves, and a pressure plate. microprocessor control, arranged to minimize the volume of anesthetic gases and eliminate all gas stagnation points within the circuit.
  • the anesthesia apparatus continues to have two modes of operation: the first being the balloon mode (toggle switch 8 in the "balloon” position), which is used in the induction phase, ie to perform manual ventilation, and turbine mode (toggle switch 8 in the “turbine” position), for automatic mechanical ventilation, where the turbine creates the gas flow containing a specific gas mixture toward the patient's respiratory system and is used in the maintenance phase of the patient's anesthetic state.
  • the toggle switch 8 may be a simple control valve which directs flow to balloon 10, interrupting flow through turbine 18, and vice versa.
  • FIG. 2 illustrates the inspiratory phase of balloon mode ventilation, where the switch valve 8 is open to balloon 10.
  • the anesthetist compresses balloon 10, and the contents of balloon 10 are pushed towards carbon dioxide filter 11
  • a one-way valve 17 which prevents air flow to turbine 18.
  • the exhalation valve 7 is closed and the inspiratory valve 3 is opened.
  • the gas mixture thus passes through the carbon dioxide filter 11, where the carbon dioxide is absorbed and the remainder of the gas is propelled toward the patient, passing the inspiratory valve 3 and entering the lung through the expiatory branch 4 and the part in question. Y 5.
  • the expiratory valve 7 remains closed, air enters the patient's lung by the action of pressure generated by balloon compression 10.
  • Figure 3 illustrates the expiatory phase of balloon mode ventilation, where the switch valve 8 is still open to balloon 10. In this phase the anesthetist releases balloon 10, allowing air flow containing the gas mixture to enter balloon 10. It is also envisaged to have a one-way valve 22 so that lung gas flows directly into the balloon 10 and remains there. At this stage, the exhalation valve 7 remains open and the inspiratory valve 3 remains closed, and the exhaled gas goes towards the expiratory valve 7 through the Y-piece 5 and the expiatory branch 6.
  • a pressure relief valve 9 which opens when the set inspiratory pressure is reached each cycle.
  • gas volume by adding more gas mixture from rotameter 1 and anesthetic vaporizer 2 as a fresh gas stream 23.
  • fresh gas stream 23 enters the circuit. continuously, both in the inspiratory phase and in the expiratory phase.
  • this increase in gas volume offsets the reduction in volume due to carbon dioxide absorption by the carbon dioxide filter, but for safety, fresh gas flow 23 is adjusted to be slightly higher than carbon dioxide absorption, and the excess is eliminated by pressure relief valve 9.
  • FIG. 4 illustrates the inspiratory phase in turbine mode.
  • switch valve 8 is open for turbine 18 and closed for balloon 10.
  • turbine 18 is turned on, and the gas mixture is propelled towards the carbon dioxide filter 11, where the carbon dioxide is absorbed, and the flow of the gas mixture goes towards the inspiratory valve 3, in which way fresh gas flow 23 is added.
  • the air flow follows the inspiratory branch 4 until it reaches the Y 5 piece, inflating the patient's lung.
  • the turbine mode is controlled by a microprocessor, which remains on, and maintains a linear actuator 16, closing a pressure control valve 15, configured to prevent gas flow through the expiratory branch 6 at a greater than a pressure determined by linear actuator 16, ie pressure control valve 15 determines The lung pressure rises to a limit pressure value set by the anesthetist.
  • FIG. 5 illustrates the expiratory phase in turbine mode.
  • switch valve 8 is open for turbine 18 and closed for balloon 10.
  • the microprocessor can reduce the electric current in actuator 16, and pressure control valve 15 opens, letting the lung gas out thus limiting the pressure.
  • Exhaled gas exits through the expiratory branch 6, and as turbine 18 is off, the gas flows through the long laminar flow duct 19, displacing the remaining gas in the duct until it exits through the mouth of an anti-pollution system 24, for disposal of surplus gas.
  • the cycle repeats, and in the new inspiration the turbine 18 is turned on, and the accumulated gas in the long laminar flow duct 19 is drawn.
  • the laminar flow long duct 19 is dimensioned such that the tidal volume is always smaller than the accumulated volume in the laminar flow long duct 19, and the volume increased by the amount of fresh gas entering continuously is sufficient to expel excess gas volume from the circuit at a rate greater than the diffusion of the gas mixture into the anesthetic gas within the long laminar flow duct 19. It is worth remembering that the lung volume of patients varies with their height and weight, with an average tidal volume of less than 1 liter.
  • the volume of laminar flow long duct 19 can be of the order of 1.5 liters, being larger than the tidal volume of the lung, but without allowing the stagnation of the gas mixture.
  • the long laminar flow duct 19 plays the role of a reservoir in contact with the external air, enabling the exchange of gases, whereby an exact point for the exchange of laminar flow is created within the long laminar flow duct 19. gas, which is shifted upwards during inspiration, but should not reach the end of the long laminar flow duct 19 as this would enter the breathing circuit.
  • the present invention describes a breathing circuit for anesthesia apparatus which has few building elements, reducing production and maintenance costs.
  • the Anesthesia according to the present invention may be constructed in a small physical space, increasing the useful space of the operating rooms.
  • Anesthesia apparatus constructed in accordance with the present invention also comprises easy gas exchange, ie a continuous flow of gas mixture without stagnation points throughout the circuit path, allowing for greater control of gas concentration and an improvement in the control of residual lung pressure in anesthetized patients.
  • Another advantage of the invention is that the single volume in the breathing circuit, derived from the laminar flow long tube reservoir 19, is located at the outlet of the excess gases so that at the end of the anesthesia section the entire contents of the gas mixture containing The anesthetic substance can be replaced by a completely anesthetic-free gas in a single respiratory cycle, very quickly starting the patient's exit from general anesthesia.

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  • Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pulmonology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Emergency Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Abstract

La présente invention concerne un circuit d'anesthésie utilisé dans un appareil d'anesthésie inhalatoire, ne possédant pas de points de stagnation de gaz du fait de l'utilisation d'une turbine (18) et d'une valve de régulation de pression, outre un réservoir à tube long (19) à écoulement laminaire en contact avec l'air extérieur.
PCT/BR2013/000465 2012-11-05 2013-11-05 Circuit respiratoire pour appareil d'anesthésie WO2014066969A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102012028313-1A BR102012028313B1 (pt) 2012-11-05 2012-11-05 Aparelho de anestesia
BRBR1020120283131 2012-11-05

Publications (2)

Publication Number Publication Date
WO2014066969A1 true WO2014066969A1 (fr) 2014-05-08
WO2014066969A8 WO2014066969A8 (fr) 2014-07-24

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BR (1) BR102012028313B1 (fr)
WO (1) WO2014066969A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105517615A (zh) * 2014-12-02 2016-04-20 深圳迈瑞生物医疗电子股份有限公司 麻醉机及其麻醉机呼吸系统
CN110420370A (zh) * 2019-08-22 2019-11-08 河南科技大学第一附属医院 一种麻醉机
CN111840745A (zh) * 2020-07-31 2020-10-30 王美健 一种临床麻醉科用供药麻醉装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989597A (en) 1987-03-09 1991-02-05 Olof Werner Apparatus for administration of at least two gases to a patient
US5094235A (en) * 1989-05-10 1992-03-10 Dragerwerk Aktiengesellschaft Anesthesia ventilating apparatus having a breathing circuit and control loops for anesthetic gas components
US5673688A (en) 1996-09-26 1997-10-07 Ohmeda Inc. Anesthesia system with CO2 monitor to suppress CO2 breakthrough
WO2000078380A1 (fr) * 1999-06-23 2000-12-28 Graham Cameron Grant Dispositif d'aide a la respiration
US6216690B1 (en) 1997-10-15 2001-04-17 Datex-Ohmeda, Inc. Method and apparatus for rapid control of set inspired gas concentration in anesthesia delivery systems
US20050103338A1 (en) * 2003-11-13 2005-05-19 Drager Medical Ag & Co. Kgaa, De, Germany Apparatus and method for supplying respiratory gas to a patient
WO2007071756A1 (fr) * 2005-12-21 2007-06-28 Maquet Critical Care Ab Ventilation manuelle par clapet d’expiration a commande electronique
EP2008679A1 (fr) * 2007-06-28 2008-12-31 General Electric Company Système respiratoire pour le patient
US20110000488A1 (en) * 2007-11-12 2011-01-06 Maquet Critical Care Ab Regulation of delivery of multiple anesthetic agents to a patient from an anesthetic breathing apparatus
DE202011102764U1 (de) * 2011-07-02 2011-12-05 Dräger Medical GmbH Beatmungssystem
EP2431065A1 (fr) * 2010-09-15 2012-03-21 General Electric Company Valve pour réduire une pression gazeuse et dispositif pour la ventilation des poumons

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989597A (en) 1987-03-09 1991-02-05 Olof Werner Apparatus for administration of at least two gases to a patient
US5094235A (en) * 1989-05-10 1992-03-10 Dragerwerk Aktiengesellschaft Anesthesia ventilating apparatus having a breathing circuit and control loops for anesthetic gas components
US5673688A (en) 1996-09-26 1997-10-07 Ohmeda Inc. Anesthesia system with CO2 monitor to suppress CO2 breakthrough
US6216690B1 (en) 1997-10-15 2001-04-17 Datex-Ohmeda, Inc. Method and apparatus for rapid control of set inspired gas concentration in anesthesia delivery systems
WO2000078380A1 (fr) * 1999-06-23 2000-12-28 Graham Cameron Grant Dispositif d'aide a la respiration
US20050103338A1 (en) * 2003-11-13 2005-05-19 Drager Medical Ag & Co. Kgaa, De, Germany Apparatus and method for supplying respiratory gas to a patient
WO2007071756A1 (fr) * 2005-12-21 2007-06-28 Maquet Critical Care Ab Ventilation manuelle par clapet d’expiration a commande electronique
EP2008679A1 (fr) * 2007-06-28 2008-12-31 General Electric Company Système respiratoire pour le patient
US20110000488A1 (en) * 2007-11-12 2011-01-06 Maquet Critical Care Ab Regulation of delivery of multiple anesthetic agents to a patient from an anesthetic breathing apparatus
EP2431065A1 (fr) * 2010-09-15 2012-03-21 General Electric Company Valve pour réduire une pression gazeuse et dispositif pour la ventilation des poumons
DE202011102764U1 (de) * 2011-07-02 2011-12-05 Dräger Medical GmbH Beatmungssystem

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105517615A (zh) * 2014-12-02 2016-04-20 深圳迈瑞生物医疗电子股份有限公司 麻醉机及其麻醉机呼吸系统
WO2016086352A1 (fr) * 2014-12-02 2016-06-09 深圳迈瑞生物医疗电子股份有限公司 Machine d'anesthésie et système respiratoire de machine d'anesthésie de celle-ci
CN110420370A (zh) * 2019-08-22 2019-11-08 河南科技大学第一附属医院 一种麻醉机
CN111840745A (zh) * 2020-07-31 2020-10-30 王美健 一种临床麻醉科用供药麻醉装置

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Publication number Publication date
BR102012028313A2 (pt) 2014-08-19
WO2014066969A8 (fr) 2014-07-24
BR102012028313B1 (pt) 2021-04-13

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