Patents by Inventor Par Emtell
Par Emtell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11000667Abstract: A breathing apparatus has a first delivery device for adding a volume of a substance to a gas flow, the delivery device having a gas inlet and a gas outlet. A unit monitors a presence of the substance in a gas downstream the delivery device using a first sensor unit at the gas outlet that provides a first measurement value based on an acoustic property of a gas in a first conduit. A second sensor unit at the gas inlet provides a second measurement value based on an acoustic property of a gas present in the second conduit. A control unit determines the presence of the substance based on the first measurement value or based on a comparison of the first measurement value and the second measurement value.Type: GrantFiled: February 8, 2016Date of Patent: May 11, 2021Assignee: Maquet Critical Care ABInventors: Erik Cardelius, Magnus Hallback, Par Emtell, Lars Wallén
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Patent number: 10912913Abstract: An anesthesia system has a unit for measuring oxygen concentration delivered to a patient, a unit for sending an alarm to an operator if the measured oxygen concentration is below a first threshold value, and a unit for automatically increasing a setting of oxygen in a fresh gas setting, so that the oxygen concentration delivered to a patient is increased, if the measured oxygen concentration is below a second threshold value. The system allows for increased safety or a lowered fresh gas flow with a maintained safety level.Type: GrantFiled: September 12, 2013Date of Patent: February 9, 2021Assignee: MAQUET CRITICAL CARE ABInventors: Mats Wallin, Mario Loncar, Christer Ahlmén, Pär Emtell
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Patent number: 10376663Abstract: The present disclosure relates to a method and a system for quantifying timing discrepancies between inspiratory effort and ventilatory assist. A trigger error is determined by comparing a start time of neural inspiration with a start time of the ventilatory assist. A cycling-off error is determined by comparing an end time of the neural inspiration with an end time of the ventilatory assist. The ventilatory assist is synchronized when the trigger error is lower than a first threshold and the cycling-off error is lower than a second threshold. The ventilatory assist may also be characterized in terms of early or late trigger and of early or late cycling-off. A trigger of a ventilator may be adjusted according to the trigger error and a cycling-off of a ventilator may be adjusted according to the cycling-off error.Type: GrantFiled: November 16, 2012Date of Patent: August 13, 2019Assignee: St. Michael's HospitalInventors: Christer Sinderby, Norman Comtois, Jennifer Beck, Pär Emtell, Michael Kock
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Patent number: 10085673Abstract: In a method for continuous and non-invasive determination of the effective lung volume, the cardiac output, and/or the carbon dioxide content of venous blood of a subject during a sequence of respiratory cycles, the inspiratory and expiratory flow, and the carbon dioxide content of at least the expiration gas are measured. In each respiratory cycle, a first parameter related to the subject's fraction of alveolar carbon dioxide, a second parameter related to the carbon dioxide content of the subject's arterial blood, and a third parameter related to the subject's carbon dioxide elimination are determined based on the measured inspiratory flow, expiratory flow and carbon dioxide content. The effective lung volume, the cardiac output, and/or the carbon dioxide content of venous blood of the subject is determined based on the correlation of the first, second and third parameters.Type: GrantFiled: March 21, 2013Date of Patent: October 2, 2018Assignee: MAQUET CRITICAL CARE ABInventors: Par Emtell, Magnus Hallback
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Publication number: 20170224234Abstract: A modular monitoring and ventilation system includes a standalone monitor unit for monitoring patient-related parameters that are indicative of the physiological status of a patient, which receives at least one signal indicative of such a patient-related parameter from at least one sensor and that displays information related to that signal on a display, and a standalone, portable pneumatic unit for ventilatory treatment of a patient by supplying breathing gas to the patient. The monitor unit and the pneumatic unit are able to placed in a paired state in which they are communicatively connected to each other for information exchange, and in which those units cooperate to provide ventilatory treatment to the patient, with operation of the portable pneumatic unit being controlled based on the signal that is indicative of the monitored patient-related parameter, received by the monitor unit from the at least one sensor.Type: ApplicationFiled: October 16, 2014Publication date: August 10, 2017Applicant: MAQUET CRITICAL CARE ABInventors: Christer AHLMEN, Mario LONCAR, Par EMTELL, Mikael KOCK
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Publication number: 20160151601Abstract: A breathing apparatus has a first delivery device for adding a volume of a substance to a gas flow, the delivery device having a gas inlet and a gas outlet. A unit monitors a presence of the substance in a gas downstream the delivery device using a first sensor unit at the gas outlet that provides a first measurement value based on an acoustic property of a gas in a first conduit. A second sensor unit at the gas inlet provides a second measurement value based on an acoustic property of a gas present in the second conduit. A control unit determines the presence of the substance based on the first measurement value or based on a comparison of the first measurement value and the second measurement value.Type: ApplicationFiled: February 8, 2016Publication date: June 2, 2016Applicant: Maquet Critical Care ABInventors: Erik Cardelius, Magnus Hallback, Par Emtell, Lars Wallén
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Patent number: 9289569Abstract: A breathing apparatus has a first delivery device for adding a volume of a substance to a gas flow, the delivery device having a gas inlet and a gas outlet. A unit monitors a presence of the substance in a gas downstream the delivery device using a first sensor unit at the gas outlet that provides a first measurement value based on an acoustic property of a gas in a first conduit. A second sensor unit at the gas inlet provides a second measurement value based on an acoustic property of a gas present in the second conduit. A control unit determines the presence of the substance based on the first measurement value or based on a comparison of the first measurement value and the second measurement value.Type: GrantFiled: November 16, 2010Date of Patent: March 22, 2016Assignee: Maquet Critical Care ABInventors: Erik Cardelius, Magnus Hallbäck, Pär Emtell, Lars Wallen
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Publication number: 20150250976Abstract: An anesthesia system has a unit for measuring oxygen concentration delivered to a patient, a unit for sending an alarm to an operator if the measured oxygen concentration is below a first threshold value, and a unit for automatically increasing a setting of oxygen in a fresh gas setting, so that the oxygen concentration delivered to a patient is increased, if the measured oxygen concentration is below a second threshold value. The system allows for increased safety or a lowered fresh gas flow with a maintained safety level.Type: ApplicationFiled: September 12, 2013Publication date: September 10, 2015Applicant: MAQUET CRITICAL CARE ABInventors: Mats Wallin, Mario Loncar, Christer Ahlmén, Pär Emtell
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Publication number: 20140296728Abstract: The present disclosure relates to a method and a system for quantifying timing discrepancies between inspiratory effort and ventilatory assist. A trigger error is determined by comparing a start time of neural inspiration with a start time of the ventilatory assist. A cycling-off error is determined by comparing an end time of the neural inspiration with an end time of the ventilatory assist. The ventilatory assist is synchronized when the trigger error is lower than a first threshold and the cycling-off error is lower than a second threshold. The ventilatory assist may also be characterized in terms of early or late trigger and of early or late cycling-off. A trigger of a ventilator may be adjusted according to the trigger error and a cycling-off of a ventilator may be adjusted according to the cycling-off error.Type: ApplicationFiled: November 16, 2012Publication date: October 2, 2014Inventors: Christer Sinderby, Norman Comtois, Jennifer Beck, Pär Emtell, Michael Kock
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Patent number: 8701458Abstract: A gas regulating device for use in calibration of a gas analyzer has an inlet and an outlet, a valve arrangement comprising at least one valve, and valve regulator for regulating the at least one valve. The gas regulating device is intended to be connected between a calibration gas supply and a gas analyzer that is to be calibrated and the valve regulator is configured to regulate the at least one valve such that gas is allowed to flow through a gas flow path between the inlet and outlet only when a gas pressure in the gas flow path, between the at least one valve and the outlet, falls below a predetermined threshold value. The gas regulating device is used when calibrating side-stream gas analyzers in which case it reduces calibration gas consumption, prevents discharge of calibration gas into the ambient environment and prevents leakages jeopardizing correct calibration.Type: GrantFiled: June 11, 2009Date of Patent: April 22, 2014Assignee: Maquet Critical Care ABInventors: Pär Emtell, Mikael Kock
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Publication number: 20130253359Abstract: In a method for continuous and non-invasive determination of the effective lung volume, the cardiac output, and/or the carbon dioxide content of venous blood of a subject during a sequence of respiratory cycles, the inspiratory and expiratory flow, and the carbon dioxide content of at least the expiration gas are measured. In each respiratory cycle, a first parameter related to the subject's fraction of alveolar carbon dioxide, a second parameter related to the carbon dioxide content of the subject's arterial blood, and a third parameter related to the subject's carbon dioxide elimination are determined based on the measured inspiratory flow, expiratory flow and carbon dioxide content. The effective lung volume, the cardiac output, and/or the carbon dioxide content of venous blood of the subject is determined based on the correlation of the first, second and third parameters.Type: ApplicationFiled: March 21, 2013Publication date: September 26, 2013Inventors: Par Emtell, Magnus Hallback
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Patent number: 8459262Abstract: A breathing apparatus for ventilating the lungs of a patient with breathing gas, has: a breathing circuit configuration; a mechanical ventilation system; a manual ventilation system provided with a manual ventilation bag; a manual ventilation valve for enabling manual ventilation of breathing gas from the breathing circuit; a pressure sensor devised to detect the pressure level in the breathing circuit; an electronically controlled expiration valve (40) that in a mechanical ventilation mode is controlled to control the pressure level in the breathing circuit according to a first set of predetermined control rules adapted to mechanical ventilation mode requirements; said electronically controlled expiration valve in a manual ventilation mode being coupled to enable ventilation of breathing gas from the breathing circuit by means of the manual ventilation system according to a second set of predetermined control rules adapted to manual ventilation mode requirements.Type: GrantFiled: December 21, 2006Date of Patent: June 11, 2013Assignee: Maquet Critical Care ABInventors: Christer Ahlmén, Pär Emtell, Petter Videbrink, Kin-Chun Wong, Mikael Kock
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Patent number: 8371298Abstract: In a method, ventilator and ventilator control unit for determining an end-expertorial lung volume (EELV) for a mechanically ventilated patient, a breathing gas is provided to the patient that has a first fixed N2/O2 gas composition, at least until the N2/O2 gas composition in air expired from the patient is constant. At least once, at a first predetermined point in time, the N2/O2 gas composition in the breathing gas is changed to a second fixed composition. The change in the N2/O2 gas composition exhaled by the patient for each breath is measured until a second point in time at which the level of expired O2 in at least two subsequent breadths is substantially stable. The measurement is made downstream of the expiratory tube of the ventilator. The total gas volume is determined for each breath, and the EELV of the patient's lungs is determined based on the change in O2 level between the first and second points in time.Type: GrantFiled: December 6, 2005Date of Patent: February 12, 2013Assignee: Maquet Critical Care ABInventors: Magnus Hallbäck, Mario Loncar, Pär Emtell, Christer Ahlmén
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Publication number: 20120312302Abstract: A breathing apparatus has a first delivery device for adding a volume of a substance to a gas flow, the delivery device having a gas inlet and a gas outlet. A unit monitors a presence of the substance in a gas downstream the delivery device using a first sensor unit at the gas outlet that provides a first measurement value based on an acoustic property of a gas in a first conduit. A second sensor unit at the gas inlet provides a second measurement value based on an acoustic property of a gas present in the second conduit. A control unit determines the presence of the substance based on the first measurement value or based on a comparison of the first measurement value and the second measurement value.Type: ApplicationFiled: November 16, 2010Publication date: December 13, 2012Inventors: Erik Cardelius, Magnus Hallbäck, Pär Emtell, Lars Wallen
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Publication number: 20120151986Abstract: The present invention relates to a gas regulating device (2A-E) for use in calibration of a gas analyzer (4). The gas regulating device comprises an inlet (8A) and an outlet (8B), a valve arrangement comprising at least one valve (11; 11A, 11B), and valve regulating means for regulating the at least one valve. The gas regulating device is intended to be connected between a calibration gas supply (3) and a gas analyzer (4) that is to be calibrated and the valve regulating means is configured to regulate the at least one valve such that gas is allowed to flow through a gas flow path (5B) between the inlet and outlet only when a gas pressure (P1) in the gas flow path, between the at least one valve and the outlet, falls below a predetermined threshold value.Type: ApplicationFiled: June 11, 2009Publication date: June 21, 2012Inventors: Pär Emtell, Mikael Kock
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Publication number: 20090277448Abstract: A breathing apparatus for ventilating the lungs of a patient with breathing gas, has: a breathing circuit configuration; a mechanical ventilation system; a manual ventilation system provided with a manual ventilation bag; a manual ventilation valve for enabling manual ventilation of breathing gas from the breathing circuit; a pressure sensor devised to detect the pressure level in the breathing circuit; an electronically controlled expiration valve (40) that in a mechanical ventilation mode is controlled to control the pressure level in the breathing circuit according to a first set of predetermined control rules adapted to mechanical ventilation mode requirements; said electronically controlled expiration valve in a manual ventilation mode being coupled to enable ventilation of breathing gas from the breathing circuit by means of the manual ventilation system according to a second set of predetermined control rules adapted to manual ventilation mode requirements.Type: ApplicationFiled: December 21, 2006Publication date: November 12, 2009Inventors: Christer Ahlmén, Pär Emtell, Petter Videbrink, Kin-Chun Wong, Mikael Kock
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Publication number: 20080289628Abstract: In a method, ventilator and ventilator control unit for determining an end-expertorial lung volume (EELV) for a mechanically ventilated patient, a breathing gas is provided to the patient that has a first fixed N2/O2 gas composition, at least until the N2/O2 gas composition in air expired from the patient is constant. At least once, at a first predetermined point in time, the N2/O2 gas composition in the breathing gas is changed to a second fixed composition. The change in the N2/O2 gas composition exhaled by the patient for each breath is measured until a second point in time at which the level of expired O2 in at least two subsequent breadths is substantially stable. The measurement is made downstream of the expiratory tube of the ventilator. The total gas volume is determined for each breath, and the EELV of the patient's lungs is determined based on the change in O2 level between the first and second points in time.Type: ApplicationFiled: December 6, 2005Publication date: November 27, 2008Inventors: Magnus Hallback, Mario Loncar, Par Emtell, Christer Ahlmen
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Patent number: 7032592Abstract: A device for the dosing of a dry additive gas into a breathing gas in a ventilator system, the ventilator system including a tubing system connectable by at a distal end to a patient, and has a dosing tube connectable to the tubing system for dosing to the distal end of the tubing system. The dosing tube is composed of a tube section having a moisture permeable contact surface, adapted to interact with moisture from exhaled breathing gas, so the dry additive gas is humidified before dosing to the distal end of the tubing system.Type: GrantFiled: June 9, 2003Date of Patent: April 25, 2006Assignee: Maquet Critical Care ABInventors: Rolf Castor, Pär Emtell
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Publication number: 20050166917Abstract: An anesthetic delivery system has a delivery unit containing a carbon dioxide retaining element and a reversible action anesthetic absorber/desorber for releasably retaining therein at least a portion of a charge of anesthetic agent. An externally accessible first internal flow section in the delivery unit directs gas through the delivery unit first through the anesthetic absorber/desorber and then through the carbon dioxide retaining element, sequentially. An externally accessible second internal flow section directs gas through the delivery unit via the anesthetic absorber/desorber and bypassing the carbon dioxide retaining element.Type: ApplicationFiled: February 26, 2003Publication date: August 4, 2005Inventors: Christer Ahlmen, Par Emtell, Mario Loncar
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Patent number: 6718978Abstract: A manual ventilation bag has a first opening and a second opening, a first soft bag connected to the first opening and a second soft bag connected to the second opening. The manual ventilation bag is advantageously used in combination with a breathing apparatus.Type: GrantFiled: January 7, 2002Date of Patent: April 13, 2004Assignee: Siemens Elema ABInventor: Pär Emtell