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133 results about "Expired gas" patented technology
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The directorate general, in cooperation with the Royal Oman Police (ROP) and Civil Defence, will intensify inspections against those vendors and distributors who sell expired gas cylinders.
Flow rate compensation for transient thermal response of hot-wire anemometers
ActiveUS20100218765A1Operating means/releasing devices for valvesVolume/mass flow by thermal effectsEngineeringOxygen
Systems and methods are described for application of a transitory corrective modification to a hot-wire anemometer flow voltage and / or calculated flow rate to compensate for transient thermal response of the anemometer during a change in mixture of a mixed gas being measured. According to one embodiment a method of applying the transitory corrective modification is provided. An output signal of an exhalation flow sensor of a medical ventilator is received. The flow sensor includes a hot-wire anemometer. The output signal is indicative of a rate of flow of expired gas by a patient. Transient thermal response of the hot-wire anemometer is compensated for by applying a corrective modification to the output signal or a value based thereon. The corrective modification is based at least in part on a fraction of inspired oxygen (FiO2) being supplied by the medical ventilator to the patient.
Owner:TYCO HEALTHCARE GRP LP
Method and apparatus for monitoring respiratory gases during anesthesia
InactiveUS6981947B2Good correlationCost-effective and frequent mannerRespiratorsMedical devicesAnesthetic AgentMetabolite
Owner:UNIV OF FLORIDA RES FOUNDATION INC
Method for continuous measurement of flux of gases in the lungs during breathing
ActiveUS20050217671A1RespiratorsOperating means/releasing devices for valvesAutonomous breathingEngineering
A method of calculating the flux of any gas (x) in a CBC circuit for a ventilated or a spontaneous breathing subject, for example said gas(x) being; a) an anesthetic such as but limited to; i)N2O; ii) sevoflurane; iii) isoflurane; iv) halothane; v) desflurame; or the like b) Oxygen; c) Carbon dioxide; or the like utilizing the following relationships; Flux of gas(x)=SGF (FSX−FEX) wherein SGF=Source of gas flow into the breathing circuit (CBC circuit) in liters / minute as read from the gas flow meter as set by the anesthesiologist; FSX=Fractional concentration of gas X in the source gas (which is set by the anesthesiologist); FEX=Fractional concentration of gas X in the end expired gas as determined by a portable gas analyzer, or the like.
Owner:THORNHILL SCI INC
Method and an apparatus for monitoring and controlling flows
ActiveUS20070163579A1Accurate flow monitoringEasy to controlRespiratorsOperating means/releasing devices for valvesExpired gasVALVE PORT
A method and an apparatus for monitoring and controlling flows in medical equipment including an anesthetic machine and a ventilator for influencing a patient's respiratory system are disclosed. The apparatus comprises a microprocessor and an airway system comprising drive gas conduits provided with an inhalation valve (2) and an exhalation valve (5) for gas discharging as well as a ventilator end flow sensor (3) for measuring the introduced or discharged drive gas flow through the valves. The airway system also comprises patient end breathing tubing in which a patient end flow sensor (11) for measuring the patient's inspired and expired gas flow is provided. By comparing the measured values of the two flow sensors against the characteristic curve of the inhalation valve (2), the microprocessor can judge the operation states and accuracy of the respective flow sensors and the inhalation valve (2).
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
Multi-port, intubation-permitting, oxygen mask
ActiveUS8365734B1Quick conversionIncrease oxygen saturationBronchoscopesGastroscopesNasal cavityEngineering
A versatile, multi-port, intubation-permitting oxygen mask is provided including two diaphragms (nasal and oral) each configured with a continuous, flexible, modifiable membrane from which an instrument-access port may be manually constructed, when and if needed. The novel oxygen mask preferably includes a multiple-inlet port having a standard oxygen tube connector and an interchangeable breathing-therapy device connector, a carbon dioxide sampling port, an exhaust port, and a nose clip. The mask can be worn as a standard oxygen mask during traditional oxygen therapy, yet quickly converted into an intubation mask. The clinician manually perforates the nasal and / or oral diaphragm to create a point and size of entry perfectly matched to the requirements for a variety of procedures that may be performed involving nasally or orally introduced scopes or probes—without disturbing the ongoing benefits of increased oxygen saturation and continuous monitoring of expired gases.
Owner:POM MEDICAL L L C
Method and apparatus for monitoring respiratory gases during anesthesia
A method and system is provided for monitoring delivery of anesthesia (inhalational and intravenous) and detecting the depth of anesthesia wherein at least one anesthetic agent is absorbed in patient's bloodstream during the administration of anesthesia, which includes sampling inspired and expired gas; analyzing the gas for concentration of at least one substance indicative of the anesthetic agent using sensor technology such as free (unmetabolized) anesthetic agent or its metabolites; determining the effect of the agent based on that concentration; and determining depth of anesthesia based thereon.
Owner:UNIV OF FLORIDA RES FOUNDATION INC
Exhaust Apparatus For Use in Administering Positive Pressure Therapy Through the Nose or Mouth
InactiveUS20080142013A1Superior CO removalReduce traffic requirementsRespiratory masksMedical devicesNasal cavityPositive pressure
We describe the use of a flow directing apparatus for incorporation into a patient mask or adjacent to it and for use with a source of pressurized breathable gas such as electronically or electronically controlled fan blower or positive displacement ventilator to provide nasal or oro-nasally administered continuous positive airway pressure or bi level therapies. Such therapies are commonly used to treat sleep disordered breathing including sleep apnea and other syndromes, as well as ventilatory insufficiency. The valve apparatus includes means to direct expired air to atmosphere and inspired air from a pressure source to a user's airway. In this way advantage is provided compared to alternative means as described in the prior art which vent a user's expired gas to atmosphere through a fixed open vent.
Owner:HALLETT MICHAEL DAVID +1
Method and system of aircraft pilot assessment
ActiveUS20060220883A1Improve reliabilityReliable methodBreathing protectionDigital data processing detailsEyelidDriver/operator
Owner:KARL F MILDE JR
Bymixer apparatus and method for fast-response, adjustable measurement of mixed gas fractions in ventilation circuits
ActiveUS7793659B2Improve responseEasy to useRespiratorsOperating means/releasing devices for valvesProduct gasEngineering
Owner:RGT UNIV OF CALIFORNIA
Diagnosis and/or therapy using blood chemistry/expired gas parameter analysis
Methods and systems for diagnosing disorders, including, for example, disordered breathing, involve sensing one or more of a blood chemistry parameter and / or an expired gas parameter, such as expired respiratory gas concentration, blood gas concentration, and blood pH. Diagnosis of the disorder may be performed by a medical device, such as a respiratory therapy device or a cardiac therapy device, based on implantably detected blood gas / pH concentration / level or externally detected expired respiratory gas concentration. Cardiac and respiratory therapies for addressing the disorder may be adjusted based on the detected parameters.
Owner:CARDIAC PACEMAKERS INC
Bymixer apparatus and method for fast-response, adjustable measurement of mixed gas fractions in ventilation circuits
ActiveUS20060201503A1Improve responseEasy to cleanRespiratorsOperating means/releasing devices for valvesBreathing gasEngineering
A bymixer device and method which provides fast-response, accurate measurements of mixed inspired and / or expired gas fractions in open or closed ventilation circuits and / or in circle circuits used in anesthesia and / or critical care. The bymixer device may include a main flow channel and a bypass flow channel. The bypass flow channel includes a flow-restrictor (e.g, an orifice) that partially blocks the flow of respiratory gas through the bypass flow channel, a mixing chamber positioned upstream of the flow restrictor and a sampling apparatus (e.g., a port for withdrawing samples of gas from said mixing chamber and / or sensor(s) positioned within the mixing chamber).
Owner:RGT UNIV OF CALIFORNIA
Intubation-Facilitating Oxygen Mask
ActiveUS20130172768A1Easy accessIncrease expired oxygen percentageBronchoscopesLaryngoscopesEngineeringContinuous monitoring
A versatile, intubation-facilitating oxygen mask is provided including at least one diaphragm configured with a continuous, flexible, modifiable membrane from which an instrument-access port may be manually constructed, when and if needed. The novel oxygen mask preferably includes a multiple-inlet port having a standard oxygen tube connector and an interchangeable breathing-therapy device connector, a carbon dioxide sampling port, an exhaust port, and a nose clip. The mask can be worn as a standard oxygen mask during traditional oxygen therapy, yet quickly converted into an intubation mask. The clinician manually perforates the nasal and / or oral membranes of the one or more diaphragms to create a point and size of entry perfectly matched to the requirements for a variety of procedures that may be performed involving nasally or orally introduced scopes or probes—without disturbing the ongoing benefits of increased oxygen saturation and continuous monitoring of expired gases.
Owner:POM MEDICAL L L C
Endotracheal tube using leak hole to lower dead space
InactiveUS7107991B2Efficient removalReduce dead spaceTracheal tubesBreathing masksLarynxEndotracheal tube
A tracheal tube ventilation apparatus to more effectively remove expired gases. In one preferred embodiment, one or more leak holes are created in the side walls of an endotracheal tube so that expired gases can leak out of the endotracheal tube above the larynx, such as into the back of the mouth (i.e., oropharynx). Each leak hole might advantageously have a diameter between 0.5 and 4.0 mm. In another preferred embodiment, a tube is attached to a proportionately larger leak hole (e.g., up to 8.0 mm) so that the expired gases can be directed away from the leak hole to a specific location, such as directed out of the mouth. In the case of mechanically controlled ventilation, a positive end expiratory pressure can be applied to this tube to mechanically assist with the process of exhaling. In each of these embodiments, it is preferred, but not required, that the endotracheal tube be an ultra-thin walled, two stage tube so as to further assist in the reduction of resistance to the flow of oxygen / air.
Owner:HEALTH & HUMAN SERVICES THE GOVERNMENT OF THE US SEC THE DEPT OF
Method for continuous measurement of flux of gases in the lungs during breathing
ActiveUS7913690B2RespiratorsOperating means/releasing devices for valvesContinuous measurementOxygen
A method of calculating the flux of any gas (x) in a CBC circuit for a ventilated or a spontaneous breathing subject, for example said gas(x) being; a) an anesthetic such as but limited to; i)N2O; ii) sevoflurane; iii) isoflurane; iv) halothane; v) desflurame; or the like b) Oxygen; c) Carbon dioxide; or the like utilizing the following relationships; Flux of gas(x)=SGF (FSX−FEX) wherein SGF=Source of gas flow into the breathing circuit (CBC circuit) in liters / minute as read from the gas flow meter as set by the anesthesiologist; FSX=Fractional concentration of gas X in the source gas (which is set by the anesthesiologist); FEX=Fractional concentration of gas X in the end expired gas as determined by a portable gas analyzer, or the like.
Owner:THORNHILL SCI INC
Non-invasive method and apparatus for optimizing the respiration of atelectatic lungs
ActiveUS9173595B2Improve accuracyReduce pressureRespiratorsOperating means/releasing devices for valvesLung alveolusNon invasive
Method for providing ventilatory settings with regard to the airway pressure levels of an artificial ventilator, the artificial ventilator is connected to a lung, including the steps of obtaining data samples of a gas concentration of the expired gas over a single breath; selecting a plurality of data samples from the obtained data samples; calculating a tracing value being sensitive to changes of alveolar dead space on the basis of the selected data samples; repeating steps a), b) and c) for obtaining a plurality of tracing values; and changing at least one airway pressure level of the artificial ventilator, wherein from an observation of a resulting course of the plurality of calculated tracing values an airway pressure level at which alveolar opening or lung overdistension or lung open condition or alveolar closing occurs is detected. Apparatus for providing ventilatory settings with regard to the airway pressure levels of an artificial ventilator is also disclosed.
Owner:SALVIA MEDICAL
Method and apparatus for ventilation assistance
InactiveUS20100101575A1Avoid pollutionEnhance biased airflowRespiratorsOperating means/releasing devices for valvesMating connectionAtmospheric air
A mask interface device is provided for a protective mask of the type having a mask filter and a mask expiratory port, the mask expiratory port having an expiratory port valve of the type that is normally closed and openable upon expiration, the mask filter having an inspiratory air inlet, the mask interface device comprising: a mask interface assembly mountable to the mask and having a mounting interface for mounting an air pressure generator in fluid communication with the inspiratory inlet of the mask filter; and an expiratory port interface assembly mountable to the mask expiratory port and comprising at least one opening for venting expired gas to atmosphere and a one-way valve that is positioned to control the flow of expired gas out through the at least one opening, and wherein the one-way valve is set to an opening pressure that provides positive end expiratory pressure or PEEP. Optionally, this opening pressure is between 2.5 and 20 cm H2O. Optionally, the mask interface device interface directly with the mask filter. In one embodiment of the invention, this interface does not require the filter to have a mating connection and is therefore is universal for a broad class of filters, for example cylindrical filters that project from the mask.
Owner:FEDORKO LUDWIK +1
Automatic Positive Airway Pressure Therapy through the Nose or Mouth for Treatment of Sleep Apnea and Other Respiratory Disorders
The method describes a means of automatic determination of required pressure levels of a breathable gas for treating sleep apnea or other respiratory disorder such as sleep hypoventilation or chronic obstructive pulmonary disease. The method makes use of a face mask nasal prongs or similar means with venting system for elimination of expired gas to atmosphere, gas delivery tubing, and a computer controlled fan or blower or other similar source of pressurised breathable gas.
Owner:VENTIFIC HLDG
Respiratory valve apparatus
The invention relates to a pressure responsive respiratory valve apparatus for enabling positive pressure from a source of pressure to be applied to a user's airway, and allowing ingress of a breathable gas from an inlet port into a user's airway during inhalation and egress of expired tidal volume of air from the user's respiratory system to an exhalation port during exhalation. The invention minimises rebreathing of expired gas and optimizes delivery of pressurised breathable gas by venting gas only during exhalation, as well as addressing important user considerations including minimizing noise, pressure swine, and size.
Owner:VENTIFIC HLDG
Nasal Interface Device
A nasal interface device delivers a high flow rate of a gas having a pressure that is adjustable to a patient. The device includes a nasal insert that is adapted to deliver pressurized breathing gas to a nasal cavity of the patient, and to receive expired air. The nasal insert has a pressurized breathing gas delivery port and an expired gas port. The expired gas port has a plurality of openings extending therethrough.
Owner:TERO ROBERT
Flow rate compensation for transient thermal response of hot-wire anemometers
ActiveUS20130239967A1Operating means/releasing devices for valvesVolume/mass flow by thermal effectsFlow transducerHotline
Systems and methods are described for application of a transitory corrective modification to a hot-wire anemometer flow voltage and / or calculated flow rate to compensate for transient thermal response of the anemometer during a change in mixture of a mixed gas being measured. According to one embodiment a method of applying the transitory corrective modification is provided. An output signal of an exhalation flow sensor of a medical ventilator is received. The flow sensor includes a hot-wire anemometer. The output signal is indicative of a rate of flow of expired gas by a patient. Transient thermal response of the hot-wire anemometer is compensated for by applying a corrective modification to the output signal or a value based thereon. The corrective modification is based at least in part on a fraction of inspired oxygen (FiO2) being supplied by the medical ventilator to the patient.
Owner:COVIDIEN LP
Nasal Interface Device
ActiveUS20110284001A1Easily adjust CPAPEfficient use ofRespiratorsOperating means/releasing devices for valvesNasal cavityBreathing gas
A nasal interface device delivers a high flow rate of a gas having a pressure that is adjustable to a patient. The device includes a nasal insert that is adapted to deliver pressurized gas to a nasal cavity of the patient, and receive and direct expired air. The nasal insert has a pressurized breathing gas delivery port and an expired gas port. An expiratory limb pressure regulator is in fluid communication with the expired gas port.
Owner:TERO ROBERT
Nasal interface device
ActiveUS8333200B2Easily adjust CPAPEfficient use ofRespiratorsOperating means/releasing devices for valvesNasal cavityNose
A nasal interface device delivers a high flow rate of a gas having a pressure that is adjustable to a patient. The device includes a nasal insert that is adapted to deliver pressurized gas to a nasal cavity of the patient, and receive and direct expired air. The nasal insert has a pressurized breathing gas delivery port and an expired gas port. An expiratory limb pressure regulator is in fluid communication with the expired gas port.
Owner:TERO ROBERT
Method for analysis of expired gas
InactiveUS6555821B1Good chanceLong measurement timeRadiation pyrometryInterferometric spectrometryAnalysis methodSpectrometer
A method for detecting and measuring volatile components in expired gas by sampling the expired gas containing the volatile components; passing infrared radiation from an interferometer through the sample; detecting infrared radiation transmitted from the sample to produce a signal characteristic for the volatile components in the sample; and processing the signal and a set of single component reference library spectra of pure molecular gases in order to detect and calculate the amount of the volatile components in the blood of an individual expiring the gas, including the use of a low resolution FT-IR spectrometer in the detecting and processing.
Owner:WALLAC
Method and system of aircraft pilot assessment and for remedial action upon pilot impairment
ActiveUS20080122636A1Improve reliabilityReliable methodBreathing protectionDigital data processing detailsEyelidDriver/operator
A method and system are disclosed for assessing the capability of a first person to operate a machine, such as an aircraft or other transport vehicle. The method includes the steps of:(a) Sensing the value of at least one, and preferably two or more information parameters for assessing the fitness of the person operating the machine. The parameters include one or a combination of electroencephalogram information, electrocardiogram information, heart rate information, respiratory rate information, eye motion information, eyelid position information, eyelid motion information, expired gas mixture information, blood oxygen content information, blood oxygen saturation information and blood pressure information for the person operating the machine, and / or information about operation of the machine as well as information about actions taken by the person operating the machine.(b) Determining whether at least one value of one information parameter is / are not within the range of values deemed to be acceptable for a capable person.(c) Indicating when the at least one information parameter is / are not within the range of acceptable values, thereby indicating the person's decreased fitness and ability to operate the machine.
Owner:MILDE JR KARL F
Method and device for pressure dividing monitoring and estimating arterial blood CO2 by using respiratory gas CO2
InactiveCN101214151ARealize non-invasive dynamic continuous monitoringHigh clinical application valueBiological testingBlood characterising devicesMathematical modelBlood arterial
The invention discloses a method and a device using the expired gas partial pressure of CO2 to monitor and estimate the CO2 partial pressure of arterial blood, belonging to the clinical respiratory monitoring technology field. The technical points includes using a CO2 analyzing and monitoring instrument for the real-time acquisition on the expiratory flow, the time and CO2 partial pressure PaCO2 to be input into a computer; processing input data; when the instant flow is 22.25 plus or minus 0.08 percent or the instant slope of the flow speed / time curve is 0.13 plus or minus 0.19, (a) and the difference of the corresponding CO2 partial pressures is within about 5 percent, the average value of the corresponding CO2 partial pressure is basically the same with the arterial blood CO2 partial pressure; (b) the corresponding CO2 partial pressure difference is over about 5 percent, the mathematical model fitting is implemented on the CO2 partial pressure / time curve to estimate the corresponding arterial blood CO2 partial pressure. The invention can be applied to clinical wound-free monitoring COPD patients, especially the PaCO2 of severe COPD patients.
Owner:THE FIRST AFFILIATED HOSPITAL OF GUANGZHOU MEDICAL UNIV (GUANGZHOU RESPIRATORY CENT) +1
Automatic lung parameter estimator for measuring oxygen and carbon dioxide gas exchange
ActiveUS20130345572A1Fit closelyLow costRespiratorsMedical devicesCompetitive bindingObstructive Pulmonary Diseases
The invention relates to a device for determining two or more respiratory parameters relating to an individual and a method for determining two or more respiratory parameters relating to an individual by means of the device. The disclosed device and method may be used in an individual suffering from pulmonary gas exchange problems relating to gas exchange of oxygen and / or carbon dioxide, e.g. a patient with chronic obstructive pulmonary disease. The device and method may also be used in a healthy individual or in an animal, e.g. for research experiments. The device has detection means for oxygen and carbon dioxide contents in inspired and expired gas and blood. The device is controlled by a computer with functionality for entering oxygenation, carbon dioxide and acid-base values from one or more blood samples from arterial, venous, central venous or mixed venous blood samples, and with the parameter estimation based on equations of gas exchange of both oxygen and carbon dioxide and equations describing the acid-base chemistry of blood potentially including the competitive binding of oxygen and carbon dioxide to hemoglobin.
Owner:TYCO HEALTHCARE GRP LP
Intubation-facilitating oxygen mask
ActiveUS8960195B2Increase oxygen saturationQuick conversionBronchoscopesLaryngoscopesEngineeringOxygen mask
Owner:POM MEDICAL L L C
Detection system for expired gas
The invention provides a detection system for expired gas. The detection system comprises an expired gas analyzer and a computer, wherein the expired gas analyzer comprises a mini vacuum pump, a gas chamber, a sensor array, a signal processing circuit and a data acquisition card; the sensor array comprises a gas sensor and an environmental monitoring sensor; the vacuum pump sucks the expired gas or clean air into the gas chamber and is in contact with the sensor array; the signal processing circuit filters responses of the sensors, and transmits the responses to the data acquisition card after amplifying the responses; and the data acquisition card transmits processed responses to the computer after digitizing the processed responses. The system can be used for assisting in analyzing expiration-related physical conditions, such as diagnosis of diabetes, blood sugar monitoring of a diabetic patient, prevention of ketoacidosis, and monitoring of fat consumption in the body building or weight losing process.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Endoscopic bite block for use with cannula
A bite block that is inserted into a patient's mouth during an endoscopic diagnostic or surgical procedure that has a channel for receiving an endoscope or other surgical instrument through the patient's mouth and additional channels transmitting a gas to the patient and transmitting expired gas from the patient.
Owner:ETHICON ENDO SURGERY INC
Rapid detection method for expired gas through on-line enrichment gas chromatography
The invention discloses a rapid detection method for expired gas through an on-line enrichment gas chromatography. The method mainly comprises the steps that: a collector is selected by using the expired gas to collect alveolar gas in the expired gas; VOCs (Volatile Organic Compounds) in the alveolar gas are adsorbed by a preconcentrator; the preconcentrator is heated to enable the VOCs enriched on an adsorbent to be desorbed; the preconcentrator is blown back by carrier gas to enable the VOCs subjected to the heat desorption to enter a chromatographic separation column along with the carrier gas for separation; and component gases of the VOCs after the separation enter a microplasma detector along with the carrier gas. After component gas molecules of the VOCs enter a discharge chamber of the microplasma detector, the component gas molecules are excited by the existing high-energy metastable-state particles, then are jumped back to ground states, and send characteristic optical signals; the characteristic optical signals sent by the jumping of the component molecules of the VOCs are focused and coupled to an optical fiber by a lens; the characteristic optical signals are transmitted by the optical fiber to a spectrograph for detection; a computer processes and stores data; and the rapid detection on the VOCs in the expired gas is realized. With the adoption of the method, components of the expired gas can be monitored in real time and on line.
Owner:SICHUAN UNIV
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