WO2011143198A2 - Patient circuit integrity alarm using exhaled c02 - Google Patents
Patient circuit integrity alarm using exhaled c02 Download PDFInfo
- Publication number
- WO2011143198A2 WO2011143198A2 PCT/US2011/035899 US2011035899W WO2011143198A2 WO 2011143198 A2 WO2011143198 A2 WO 2011143198A2 US 2011035899 W US2011035899 W US 2011035899W WO 2011143198 A2 WO2011143198 A2 WO 2011143198A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbon dioxide
- patient
- amount
- dioxide sensor
- gas
- Prior art date
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 170
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 86
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 85
- 238000002644 respiratory therapy Methods 0.000 claims abstract description 28
- 230000003434 inspiratory effect Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 47
- 230000029058 respiratory gaseous exchange Effects 0.000 description 11
- 210000004072 lung Anatomy 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000010496 Heart Arrest Diseases 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0051—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes with alarm devices
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
- A61M16/022—Control means therefor
- A61M16/024—Control means therefor including calculation means, e.g. using a processor
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
-
- 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. mouth-to-mouth respiration; 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/06—Respiratory or anaesthetic masks
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
- A61M16/0816—Joints or connectors
- A61M16/0833—T- or Y-type connectors, e.g. Y-piece
-
- 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. mouth-to-mouth respiration; 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
- A61M16/16—Devices to humidify the respiration air
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory devices
- A61M16/201—Controlled valves
- A61M16/202—Controlled valves electrically actuated
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
- A61M2016/0018—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical
- A61M2016/0021—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical with a proportional output signal, e.g. from a thermistor
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
- A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
- A61M2016/0036—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the breathing tube and used in both inspiratory and expiratory phase
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
- A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
- A61M2016/0039—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the inspiratory circuit
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
- A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
- A61M2016/0042—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the expiratory circuit
-
- 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. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
- A61M2016/102—Measuring a parameter of the content of the delivered gas
- A61M2016/103—Measuring a parameter of the content of the delivered gas the CO2 concentration
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/13—General characteristics of the apparatus with means for the detection of operative contact with patient, e.g. lip sensor
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
- A61M2205/583—Means for facilitating use, e.g. by people with impaired vision by visual feedback
-
- 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
- A61M2230/00—Measuring parameters of the user
- A61M2230/40—Respiratory characteristics
- A61M2230/43—Composition of exhalation
- A61M2230/432—Composition of exhalation partial CO2 pressure (P-CO2)
Definitions
- Lung ventilators provide therapeutic gas (e.g., oxygen) and pressure volume support to a patient's lungs in order to facilitate gas exchange with a patient, either by supporting spontaneous breathing or by providing mandatory ventilation in the absence of spontaneous breathing.
- the gas is provided to a patient through an inspiratory conduit and the ventilator is fluidly coupled to the lung using a patient interface such as an endotracheal tube, a nasal cannula or a mask.
- a patient interface such as an endotracheal tube, a nasal cannula or a mask.
- a respiratory therapy system includes an inspiratory conduit and an expiratory port.
- a patient interface is fluidly coupled to the inspiratory conduit and the expiratory port.
- the patient interface is further configured to be coupled to a patient.
- a carbon dioxide sensor is fluidly coupled to the expiratory port and provides an indication of whether the patient interface is fluidly coupled to the patient.
- a respiratory therapy system includes a ventilator configured to provide inhaled gas to a patient and receive exhaled gas from the patient.
- the respiratory therapy system also includes a carbon dioxide sensor determining an amount of carbon dioxide in the exhaled gas and comparing the amount to a threshold.
- a method of providing respiratory therapy to a patient includes providing a patient interface configured to be fluidly coupled to the patient. Gas is provided to the patient interface through an inspiratory conduit and exhaled gas is received from the patient. An amount of carbon dioxide is measured in the exhaled gas and an indication of fluid coupling between the patient interface and the patient is provided as a function of the amount of carbon dioxide.
- FIG. 1 is a schematic diagram of a first embodiment of a respiratory therapy system.
- FIG. 2 is a schematic diagram of a second embodiment of a respiratory therapy system.
- FIG 3. is a schematic diagram of a third embodiment of a respiratory therapy system.
- FIG. 4 is a schematic diagram of a fourth embodiment of a respiratory therapy system.
- FIG. 5 is a schematic diagram of a mask having a carbon dioxide sensor coupled thereto.
- FIG. 6 is a graph of carbon dioxide measured from exhaled gas of a respiratory therapy system as a function of time.
- FIG. 1 is a schematic view of a respiratory therapy system 10 including a ventilator
- ventilator 12 supplies gases to humidifier 14 through an initial conduit 20.
- Humidifier 14 heats water within a humidification chamber to form water vapor, which mixes with gas provided by the ventilator 12, which is then output to patient circuit 16.
- Patient circuit 16 includes an inspiratory conduit (or limb) 22, a y-connector 24 and an expiratory conduit (or limb) 26.
- the y-connector 24 and/or expiratory conduit 26 can be eliminated.
- humidifier 14 can be eliminated and thus the patient is provided with dry breathing gas.
- Y-connector 24 includes an inspiratory port 28, a patient port 30 and an expiratory port 32.
- Inspiratory conduit 22 is fluidly coupled to the inspiratory port 28, so that gases from ventilator 12 are transferred from the inspiratory port 28 to the patient port 30.
- Patient port 30, is fluidly coupled to a patient interface 34 that is configured to be fluidly coupled to lungs of the patient. Exhaled gas from the patient is transmitted from patient interface 34 to expiratory port 32.
- Expiratory port 32 is fluidly coupled to expiratory conduit 26, which transmits exhaled gas back to ventilator 12.
- patient interface 34 is an endotracheal tube. Other patient interfaces can include masks, nasal prongs, etc.
- ventilator 12 includes a controller 40 for operating the ventilator
- controller 40 can provide several functions to monitor and control various parameters associated with respiratory therapy system 10. Such parameters include gas flow rate, gas temperature, carbon dioxide quantity, gas mixture percentages, etc.
- ventilator 12 includes an air inlet 42 and a gas inlet 44 fluidly coupled to a gas mixing and flow delivery module 46.
- controller 40 is configured to control gas mixing and flow delivery module 46 so as to provide a desired gas mixture to initial conduit 20.
- Air inlet 42 provides air to gas mixing and flow delivery module 46 whereas gas inlet 44 provides a gas such as oxygen to gas mixing and flow delivery module 46.
- Gas mixing and flow delivery module 46 mixes the gases from inlets 42 and 44 in order to provide a desired blend of gas.
- ventilator 12 may operate solely with air, with a predetermined mixture of gas (e.g., a mixture of helium and oxygen) or operate with other gas inlet configurations.
- a predetermined mixture of gas e.g., a mixture of helium and oxygen
- the desired blend of gas from mixing and flow delivery module 46 flows through a flow sensor 48 and a pressure sensor 50, which monitor the flow and pressure, respectively, of gas flowing to initial conduit 20.
- Flow sensor 48 and pressure sensor 50 can be coupled to controller 40 so as to provide data to controller 40 for control of ventilator 12.
- Initial conduit 20 is fluidly coupled to ventilator 12 at a gas outlet 52.
- ventilator 12 also receives exhaled air from the patient through expiratory port 32 and expiratory conduit 26, which can be fluidly coupled to ventilator 12 through a gas inlet 54.
- exhaled gas flows through a flow sensor 56 and a carbon dioxide sensor 58 to an exhaust valve 60, which can both be operably coupled to controller 40.
- Exhaust valve 60 can be operated to release gas from ventilator 12 through an exhaust 62 so as to maintain a desired pressure within patient circuit 16.
- Flow sensor 56 measures flow of air from the patient while carbon dioxide sensor 58 determines whether the patient circuit 16 is properly coupled to the patient, for example by comparing an amount of carbon dioxide in the exhaled air to a threshold.
- Carbon dioxide sensor 58 can be obtained from Alphasense Ltd., of Great Notley, United Kingdom, part IRC-A1, in one embodiment. In any event, the carbon dioxide sensor is fluidly coupled to expiratory port 32 so as to measure an amount of carbon dioxide from the patient.
- a carbon dioxide sensor need not be positioned directly within ventilator 12 and can be selectively positioned in various locations so as to be fluidly coupled to an expiratory port and receive exhaled gas from the patient.
- multiple carbon dioxide sensors can be utilized in other embodiments.
- a first carbon dioxide sensor 70 is positioned proximate the patient and fluidly coupled directly to expiratory port 32 and y-connector 24, the carbon dioxide 70 sensor being electrically coupled to the ventilator 12 through a cable 72.
- Carbon dioxide sensor 70 measures an amount of carbon dioxide in expiratory port 32 and provides the amount to ventilator 12.
- the carbon dioxide sensor 70 can be coupled to controller 40.
- a second carbon dioxide sensor 74 is fluidly coupled to inspiratory port 28 to measure an amount of carbon dioxide in the inspiratory port 28. The respective measured values from sensors 70 and 74 can be compared by controller 40 to determine whether the patient circuit 16 is fluidly coupled to the patient.
- a flow sensor 80 and a carbon dioxide sensor 82 are both fluidly coupled to expiratory port 32 proximate the patient.
- the carbon dioxide sensor 82 is coupled with the flow sensor 80 and measurements from the flow sensor 80 and carbon dioxide sensor 82 are provided to ventilator 12, and in particular controller 40, through a cable 84.
- patient interface 34 is embodied as a mask 90, wherein a carbon dioxide sensor 92 is directly affixed to the mask 90 and electrically coupled to ventilator 12 though a cable 94. Expiratory conduit 26 has been eliminated and exhaled gas is released from the mask 90 through an expiratory port integrated into the mask 90. Carbon dioxide sensor 92 directly measures an amount of carbon dioxide exhaled by the patient into the mask 90.
- FIG. 5 is a close-up view of mask 90, illustrating carbon dioxide sensor 92 and cable 94 coupled thereto. Carbon dioxide sensor is provided in an expiratory port 95 of mask 90.
- Mask 90 also includes a safety valve 96 for releasing pressure within mask 90.
- a photochemical carbon dioxide sensor 98 can provide further visual indication of mask 90 being fluidly coupled to the patient.
- system 10 By fluidly coupling a carbon dioxide detector to an expiratory port, system 10, as illustrated in FIGS. 1-4 above, can detect if a patient interface is fluidly coupled to a patient.
- Exhaled gas from a patient includes higher amounts of carbon dioxide then ambient gas or inhaled gas within inspiratory conduit 22.
- a carbon dioxide sensor e.g., sensors 58, 70, 74, 82, 92
- a non-dispersive infrared sensor or electrochemical sensor to analyze exhaled gas can detect presence or absence of carbon dioxide in order to provide a reliable detection for a loss of breathing circuit integrity. Stated another way, a low level of carbon dioxide for a period of time can indicate that a patient interface is not properly fluidly coupled to the patient.
- the carbon dioxide concentration in the exhaled gas is measured by the carbon dioxide sensor and continuously compared with a threshold value.
- the alarm 64 e.g., audible and/or visible
- the alarm can include a red flashing lamp, an audible alarm, a textual message provided on a graphical interface and/or combinations thereof.
- a differential value can be calculated between different carbon dioxide measurements. The differential value can further be compared to a threshold and alarm 64 operated if the value is below the threshold.
- a photochemical carbon dioxide detector e.g., sensor 98
- FIG. 6 is a graph of an amount carbon dioxide measured as a function of time. In periods where the patient exhales, as denoted by period 100, the amount of carbon dioxide rises. In contrast, where the patient inhales, as denoted by period 102, the amount of carbon dioxide is reduced to a small amount. In some instances, it may be appropriate to use a fixed threshold carbon dioxide concentration, for example, within a range of 1,000 to 10,000 parts per million. An example threshold 104 is indicated in FIG. 6. One example threshold would be 1,500 parts per million (i.e., 0.15%). In other applications, an algorithm may be used to select a preferred threshold value.
- a preferred threshold may be selected within the same range, allowing more rapid detection of disconnection.
- the value for a specified period for detection of disconnection may either be a preset preferred value, such as 30 seconds or it may be longer or shorter and determined by a clinician using knowledge of a patient's physiological status. For example, a shorter interval such as 10 seconds may be appropriate in the case of a pre-term infant, who may sustain significant harm within 20 seconds of loss of respiratory support, or the value may be at longer intervals such as one minute for an adult patient requiring some additional support for spontaneous breathing.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2012012791A MX2012012791A (en) | 2010-05-11 | 2011-05-10 | Patient circuit integrity alarm using exhaled c02. |
EP11781131.5A EP2569036B1 (en) | 2010-05-11 | 2011-05-10 | Patient circuit integrity alarm using exhaled c02 |
CN201180023261.XA CN103002939B (en) | 2010-05-11 | 2011-05-10 | Utilize patient's circuit integrity alarm of the carbon dioxide of breathing out |
BR112012028156-9A BR112012028156B1 (en) | 2010-05-11 | 2011-05-10 | respiratory therapy system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/777,393 | 2010-05-11 | ||
US12/777,393 US8905019B2 (en) | 2010-05-11 | 2010-05-11 | Patient circuit integrity alarm using exhaled CO2 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011143198A2 true WO2011143198A2 (en) | 2011-11-17 |
WO2011143198A3 WO2011143198A3 (en) | 2012-04-05 |
Family
ID=44910635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2011/035899 WO2011143198A2 (en) | 2010-05-11 | 2011-05-10 | Patient circuit integrity alarm using exhaled c02 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8905019B2 (en) |
EP (1) | EP2569036B1 (en) |
CN (1) | CN103002939B (en) |
BR (1) | BR112012028156B1 (en) |
MX (1) | MX2012012791A (en) |
WO (1) | WO2011143198A2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120272962A1 (en) * | 2011-04-29 | 2012-11-01 | Nellcor Puritan Bennett Llc | Methods and systems for managing a ventilator patient with a capnometer |
GB2510321B (en) * | 2012-11-12 | 2018-01-31 | Biosurgical S L | Agitation apparatus |
CA2889825C (en) * | 2014-04-30 | 2023-11-07 | Maurizio Borsari | Process and apparatus for the detection of the concentration and/or amount of carbon dioxide per unit of time contained in a flow of gas to be monitored |
WO2016103122A1 (en) * | 2014-12-24 | 2016-06-30 | Koninklijke Philips N.V. | Systems and methods for detection of ventilator and patient disconnections using patient lung compliance estimated on both inhalation and exhalation phases of a breath |
EP3302267A4 (en) * | 2015-06-03 | 2019-01-16 | The Regents of the University of California | Resuscitation and ventilation monitor |
DE102017124256A1 (en) * | 2016-10-29 | 2018-05-03 | Sendsor Gmbh | Sensor and method for measuring the properties of the respiratory gas |
CN109718449B (en) * | 2018-12-29 | 2020-04-10 | 北京谊安医疗系统股份有限公司 | Prompting method and system in anesthesia induction process and respiratory support machine |
US20210128863A1 (en) * | 2019-06-10 | 2021-05-06 | Neotech Products Llc | Nasal cannula and tubing with ventilator system |
WO2022119790A1 (en) * | 2020-12-01 | 2022-06-09 | The Government Of The United States, As Represented By The Secretary Of The Army | Thermogenic airway management device and methods |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6041777A (en) * | 1995-12-01 | 2000-03-28 | Alliance Pharmaceutical Corp. | Methods and apparatus for closed-circuit ventilation therapy |
US20050177055A1 (en) * | 2000-02-22 | 2005-08-11 | Kai Kuck | Algorithms, systems, and methods for estimating carbon dioxide stores, transforming respiratory gas measurements, and obtaining accurate noninvasive pulmonary capillary blood flow and cardiac output measurements |
US20050203432A1 (en) * | 1996-12-19 | 2005-09-15 | Orr Joseph A. | Apparatus and method for non-invasively measuring cardiac output |
US20070028921A1 (en) * | 1999-06-30 | 2007-02-08 | Banner Michael J | Medical ventilator and method of controlling same |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4302640A (en) | 1979-11-07 | 1981-11-24 | Bourns Medical Systems, Inc. | Flow detector |
US5063938A (en) * | 1990-11-01 | 1991-11-12 | Beck Donald C | Respiration-signalling device |
US5319355A (en) * | 1991-03-06 | 1994-06-07 | Russek Linda G | Alarm for patient monitor and life support equipment system |
JPH0620535Y2 (en) * | 1991-07-08 | 1994-06-01 | アトム株式会社 | Airway adapter |
US5662099A (en) | 1996-03-29 | 1997-09-02 | Ohmeda Inc. | Detection of bellows collapsed condition in medical ventilator |
DK0973443T3 (en) * | 1997-01-17 | 2006-07-24 | Ino Therapeutics Gmbh | Controlled gas supply system |
US5881717A (en) * | 1997-03-14 | 1999-03-16 | Nellcor Puritan Bennett Incorporated | System and method for adjustable disconnection sensitivity for disconnection and occlusion detection in a patient ventilator |
AUPP783198A0 (en) * | 1998-12-21 | 1999-01-21 | Resmed Limited | Determination of mask fitting pressure and correct mask fit |
IL130371A (en) * | 1999-06-08 | 2004-06-01 | Oridion Medical Ltd | Capnography waveform interpreter |
US6938619B1 (en) * | 2000-06-13 | 2005-09-06 | Scott Laboratories, Inc. | Mask free delivery of oxygen and ventilatory monitoring |
EP1322367A4 (en) * | 2000-09-28 | 2009-08-26 | Invacare Corp | Carbon dioxide-based bi-level cpap control |
US7886740B2 (en) * | 2003-01-28 | 2011-02-15 | Beth Israel Deaconess Medical Center, Inc. | Gas systems and methods for enabling respiratory stability |
US7343917B2 (en) * | 2003-09-22 | 2008-03-18 | Resmed Limited | Clear cycle for ventilation device |
WO2005113045A1 (en) * | 2004-04-20 | 2005-12-01 | Crutchfield Clifton D | Respirator fit-testing apparatus and method |
JP5053083B2 (en) * | 2004-06-24 | 2012-10-17 | コンヴァージェント エンジニアリング インコーポレイティッド | Method and apparatus for non-invasive prediction of positive end expiratory pressure (PEEPi) in a patient receiving ventilator support |
EP1820528A1 (en) | 2006-02-20 | 2007-08-22 | General Electric Company | Patient breathing circuit |
GB0607939D0 (en) * | 2006-04-21 | 2006-05-31 | Imp College Innovations Ltd | Method and device for stabilising disordered breathing |
US8312879B2 (en) * | 2006-10-16 | 2012-11-20 | General Electric Company | Method and apparatus for airway compensation control |
CA2668055A1 (en) * | 2006-11-01 | 2008-05-08 | Joseph Fisher | Portable life support apparatus |
CN201286922Y (en) * | 2008-10-07 | 2009-08-12 | 胡战兵 | Oxygen absorption tube with respiration monitoring function |
JP5758875B2 (en) * | 2009-04-02 | 2015-08-05 | ブリーズ・テクノロジーズ・インコーポレーテッド | Non-invasive ventilation system |
-
2010
- 2010-05-11 US US12/777,393 patent/US8905019B2/en active Active
-
2011
- 2011-05-10 WO PCT/US2011/035899 patent/WO2011143198A2/en active Application Filing
- 2011-05-10 MX MX2012012791A patent/MX2012012791A/en active IP Right Grant
- 2011-05-10 EP EP11781131.5A patent/EP2569036B1/en active Active
- 2011-05-10 BR BR112012028156-9A patent/BR112012028156B1/en active IP Right Grant
- 2011-05-10 CN CN201180023261.XA patent/CN103002939B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6041777A (en) * | 1995-12-01 | 2000-03-28 | Alliance Pharmaceutical Corp. | Methods and apparatus for closed-circuit ventilation therapy |
US20050203432A1 (en) * | 1996-12-19 | 2005-09-15 | Orr Joseph A. | Apparatus and method for non-invasively measuring cardiac output |
US20070028921A1 (en) * | 1999-06-30 | 2007-02-08 | Banner Michael J | Medical ventilator and method of controlling same |
US20050177055A1 (en) * | 2000-02-22 | 2005-08-11 | Kai Kuck | Algorithms, systems, and methods for estimating carbon dioxide stores, transforming respiratory gas measurements, and obtaining accurate noninvasive pulmonary capillary blood flow and cardiac output measurements |
Also Published As
Publication number | Publication date |
---|---|
CN103002939A (en) | 2013-03-27 |
BR112012028156B1 (en) | 2020-12-01 |
WO2011143198A3 (en) | 2012-04-05 |
US8905019B2 (en) | 2014-12-09 |
EP2569036A4 (en) | 2017-08-09 |
EP2569036B1 (en) | 2020-12-09 |
EP2569036A2 (en) | 2013-03-20 |
BR112012028156A2 (en) | 2016-12-06 |
MX2012012791A (en) | 2013-05-20 |
CN103002939B (en) | 2016-01-20 |
US20110277758A1 (en) | 2011-11-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2569036B1 (en) | Patient circuit integrity alarm using exhaled c02 | |
US20210308395A1 (en) | System for determining airway patency | |
JP7067925B2 (en) | System and method for advanced gas sources and / or therapeutic gas supply system and method and / or therapeutic gas supply augmentation performance verification | |
US8033280B2 (en) | Inhalation anaesthesia delivery system and a method for leak detection in the inhalation anaesthesia delivery system | |
US20200360634A1 (en) | Endotracheal tube extubation detection | |
US6668828B1 (en) | System and elements for managing therapeutic gas administration to a spontaneously breathing non-ventilated patient | |
US20080295837A1 (en) | Method to limit leak compensation based on a breathing circuit leak alarm | |
US20050217668A1 (en) | System and elements for managing therapeutic gas administration to a spontaneously breathing non-ventilated patient | |
EP2383008B1 (en) | Arrangement for maintaining volume of breathing gas in a desired level | |
JP5570853B2 (en) | Ventilator | |
JP2017509432A (en) | System and method for delivering therapeutic gas to a patient in need using enhanced breathing circuit gas (BCG) flow measurement | |
EP2914321B1 (en) | A breathing apparatus and a method therein | |
US20180256837A1 (en) | Gas flow indicator | |
US10821247B2 (en) | Ventilator and operating method for a ventilator with a determination of cough attacks | |
CN105944201B (en) | A kind of medicinal intelligent ventilator | |
US20240075226A1 (en) | System and method for accurate estimation of intentional and unintentional leaks in flow generation systems | |
US8973575B2 (en) | Anaesthesia machine arrangement and a method in connection with an anaesthesia machine arrangement | |
US11135382B2 (en) | Medical device and process for alarm organization | |
CN114364422A (en) | Supplemental gas source detection and related apparatus and methods | |
CN204017086U (en) | No supply and monitoring device and respiratory system | |
CN108066865B (en) | Medical device and method for determining an operating situation in a medical device | |
WO2020081394A1 (en) | Improved continuous positive airway pressure device for neonates | |
WO2021240529A1 (en) | Ventilation splitter device and system and method for ventilation | |
US20110209703A1 (en) | Artificial ventilation apparatus | |
KR20240006502A (en) | Alarm for respiratory assistance systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180023261.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11781131 Country of ref document: EP Kind code of ref document: A2 |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2012/012791 Country of ref document: MX |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011781131 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112012028156 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112012028156 Country of ref document: BR Kind code of ref document: A2 Effective date: 20121101 |