Patents by Inventor Christer Ahlmen
Christer Ahlmen 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: 11771860Abstract: A nasal patient interface arrangement is for transporting breathing gas from a pressurized gas supply to a patient. The arrangement provides a first bidirectional gas passage in contact with ambient air and receives nasally expired air. The arrangement includes an inspiratory air conduit connecting to a pneumatic unit. The arrangement also includes a nose adapter for bidirectional gas transport. The nose adapter is connected to a nose of the patient. The arrangement further includes a valve arrangement controlling the passage of gas through the first bidirectional gas passage. The arrangement provides a second bidirectional gas passage which is connected to the inspiratory air conduct, the nose adapter, and the first gas passage. The valve arrangement is substantially enclosed in the first bidirectional gas passage.Type: GrantFiled: June 8, 2018Date of Patent: October 3, 2023Assignee: MAQUET CRITICAL CARE ABInventor: Christer Ahlmén
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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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Publication number: 20200376224Abstract: An assembly is configured to provide access to an interior volume of a breathing conduit. The assembly includes a piercing portion and a body portion. The piercing portion is configured to pierce through a wall of the breathing conduit to make an opening there through. The piercing portion is configured to be inserted through the opening, into the interior volume. The body portion includes a channel configured to provide fluid access to the interior volume. The assembly also includes a sealing configured to seal an area between the opening and the body portion. A breathing conduit kit includes a breathing conduit and an assembly.Type: ApplicationFiled: December 5, 2017Publication date: December 3, 2020Inventor: Christer AHLMÉN
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Publication number: 20200206448Abstract: The present disclosure relates to a nasal patient interface arrangement (100) for transporting breathing gas from a pressurised gas supply (111) to a patient (190). The arrangement (100) is adapted to provide a first bidirectional gas passage (130) in contact with ambient air (170) and adapted to receive nasally expired air. The arrangement (100) comprises an inspiratory air conduit (150) for connection to a pneumatic unit (110). The arrangement (100) further comprises a nose adapter (120) for bidirectional gas transport. The nose adapter (120) is arranged to be connected to a patient's (190) nose (199). The arrangement further comprises a valve arrangement (140) for controlling the passage of gas through the first bidirectional gas passage (130). The arrangement (100) is adapted to provide a second bidirectional gas passage (160) which is connected to the inspiratory air conduct (150), to the nose adapter (120), and to the first gas passage (130).Type: ApplicationFiled: June 8, 2018Publication date: July 2, 2020Inventor: Christer AHLMÉN
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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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Patent number: 9199056Abstract: A respiratory anesthetic aggregate devised for coupling to a breathing apparatus has an anesthetic gasifier unit that has a breathing gas input port connected to a first point in an inspiratory patient gas delivery path of a breathing apparatus, and a fresh gas output port connected to a second point in the patient gas delivery path downstream the first point. The inspiratory patient gas delivery path is connected via a mainstream connection between the first and second point. Thereby the anesthetic gasifier unit is connected in a sidestream configuration to the patient gas delivery path for adding the gasified anesthetic agent in a desired concentration to the patient gas delivery path at the second point. When aggregate is coupled to a breathing apparatus, a substantially volume neutral delivery of anesthetic agent is provided to the breathing apparatus.Type: GrantFiled: January 19, 2010Date of Patent: December 1, 2015Assignee: Maquet Critical Care ABInventors: Mario Loncar, Mats Wallin, Christer Ahlmén
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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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Patent number: 8978652Abstract: An anesthetic breathing apparatus has a first gas analyzer arranged to provide gas measurement data related to a first sample point to a control unit that is arranged in a servo or feedback control system configured to adjust delivery of a vaporized anesthetic agent from an anesthetic vaporizer to a delivery point in an inspiratory branch of a breathing circuit of the anesthetic breathing apparatus, The first sampling point is arranged in the breathing circuit downstream and close to the delivery point. A second gas analyzer arranged to be operated in a first mode of operation to provide gas measurement data for patient monitoring, and arranged to be operated in a second mode of operation to provide gas measurement data to the control unit. A switch over unit is fluidly connected to the second gas analyzer, and arranged to switch fluid communication of said second gas analyzer between the first sample point for the second mode of operation and a second sample point for the first mode of operation.Type: GrantFiled: November 14, 2007Date of Patent: March 17, 2015Assignee: Maquet Critical Care ABInventors: Christer Ahlmén, Marlo Loncar
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Patent number: 8539950Abstract: In an apparatus for collection of waste anesthetic gases, and a method of using such an apparatus, the apparatus has a gas collection chamber with an input port to be connected to an exhaust of an anesthesia delivery system for receiving a first gas flow therefrom that contains a waste anesthetic gas component. An output port from the gas collection chamber is connected to a vacuum system for evacuation of an evacuation gas flow from the gas collection chamber. A bidirectional port leads to and from the gas collection chamber, which has an adsorbing unit connecting the gas collection chamber with an ambient environment surrounding the gas collection chamber. The apparatus provides for safe prevention of discharge of exhaled anesthetic gases into an ambient atmosphere surrounding the apparatus.Type: GrantFiled: February 27, 2007Date of Patent: September 24, 2013Assignee: Maquet Critical Care ABInventors: Christer Ahlmén, Stefan Broborg
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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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Patent number: 8210169Abstract: A delivery apparatus for pressurized medical liquids has a primary reservoir that pressurizes a medical liquid therein to a driving pressure, a second reservoir having an inlet connected to receive pressurized liquid from the primary reservoir via a controllable intermediate valve, and an outlet for discharge of the received medical liquid via a controllable dosing valve. A pressure measuring unit measures the pressure in the secondary reservoir and a control unit controls the intermediate valve and the dosing valve by monitoring the operation of the intermediate valve and the dosing valve dependent on the measured pressure value from the pressure measuring unit. The control unit generates a status signal dependent on predetermined rules for measured pressure changes compared with calculated pressure changes.Type: GrantFiled: July 14, 2005Date of Patent: July 3, 2012Assignee: Maquet Critical Care ABInventors: Christer Ahlmén, Mario Loncar
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Patent number: 8205610Abstract: A delivery apparatus for pressurized medical liquids has a reservoir for medical liquid and a pressurizing means configured for pressurizing medical liquid to a driving pressure; with a diffusion barrier arranged to float on medical liquid in the reservoir and disposed to cover substantially the entire surface of the medical liquid in the reservoir for the purpose of preventing diffusion of gas present in the reservoir into the medical liquid.Type: GrantFiled: June 29, 2005Date of Patent: June 26, 2012Assignee: Maquet Critical Care ABInventors: Christer Ahlmén, Ake Larsson
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Patent number: 8127762Abstract: An anaesthesia apparatus has a control unit that controls a gas flow of a flushing gas through at least part of the anaesthesia apparatus so as to flush anaesthetic agent from the apparatus when the apparatus is not connected to a patient. In this way the remaining anaesthetic agent can be removed from the anaesthesia apparatus after use before connecting another patient. Pre-use check of the apparatus can be performed automatically.Type: GrantFiled: June 29, 2006Date of Patent: March 6, 2012Assignee: Maquet Critical Care ABInventors: Mario Loncar, Christer Ahlmén, Stefan Broborg
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Publication number: 20120031402Abstract: A respiratory anesthetic aggregate devised for coupling to a breathing apparatus has an anesthetic gasifier unit that has a breathing gas input port connected to a first point in an inspiratory patient gas delivery path of a breathing apparatus, and a fresh gas output port connected to a second point in the patient gas delivery path downstream the first point. The inspiratory patient gas delivery path is connected via a mainstream connection between the first and second point. Thereby the anesthetic gasifier unit is connected in a sidestream configuration to the patient gas delivery path for adding the gasified anesthetic agent in a desired concentration to the patient gas delivery path at the second point. The When aggregate is coupled to a breathing apparatus, a substantially volume neutral delivery of anesthetic agent is provided a to the breathing apparatus.Type: ApplicationFiled: January 19, 2010Publication date: February 9, 2012Inventors: Mario Loncar, Mats Wallin, Christer Ahlmén
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Publication number: 20110048417Abstract: In an apparatus for collection of waste anesthetic gases, and a method of using such an apparatus, the apparatus has a gas collection chamber with an input port to be connected to an exhaust of an anesthesia delivery system for receiving a first gas flow therefrom that contains a waste anesthetic gas component. An output port from the gas collection chamber is connected to a vacuum system for evacuation of an evacuation gas flow from the gas collection chamber. A bidirectional port leads to and from the gas collection chamber, which has an adsorbing unit connecting the gas collection chamber with an ambient environment surrounding the gas collection chamber. The apparatus provides for safe prevention of discharge of exhaled anesthetic gases into an ambient atmosphere surrounding the apparatus.Type: ApplicationFiled: February 27, 2007Publication date: March 3, 2011Inventors: Christer Ahlmén, Stefan Broborg
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Publication number: 20110017211Abstract: In an embodiment an anesthetic breathing apparatus is disclosed comprising a first gas analyzer (200) arranged to provide gas measurement data related to a first sample point (190) to a control unit (65) that is arranged in a servo or feedback control system configured to adjust delivery of a vaporized anesthetic agent from an anesthetic vaporizer (22) to a delivery point (19) in an inspiratory branch of a breathing circuit (7) of said anesthetic breathing apparatus, wherein said first sampling point (190) is arranged in said breathing circuit (7) downstream and close to said delivery point (19); a second gas analyzer (210) arranged to be operated in a first mode of operation to provide gas measurement data for patient monitoring, and arranged to be operated in a second mode of operation to provide gas measurement data to said control unit (65); and a switch over unit (240) fluidly connected to said second gas analyzer (210), and arranged to switch fluid communication of said second gas analyzer (210) betweenType: ApplicationFiled: November 14, 2007Publication date: January 27, 2011Applicant: MAQUET CRITICAL CARE ABInventors: Christer Ahlmén, Marlo Loncar
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Publication number: 20100224184Abstract: A delivery apparatus for pressurized medical liquids comprising a reservoir for medical liquid and a pressurizing means configured for pressurizing medical liquid to a driving pressure; with a diffusion barrier arranged to float on medical liquid in the reservoir and disposed to cover substantially the entire surface of the medical liquid in the reservoir for the purpose of preventing diffusion of gas present in the reservoir into the medical liquid.Type: ApplicationFiled: June 29, 2005Publication date: September 9, 2010Inventors: Christer Ahlmén, Ake Larsson
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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: 20090250054Abstract: An anaesthesia apparatus has a control unit that controls a gas flow of a flushing gas through at least part of the anaesthesia apparatus so as to flush anaesthetic agent from the apparatus when the apparatus is not connected to a patient. In this way the remaining anaesthetic agent can be removed from the anaesthesia apparatus after use before connecting another patient. Pre-use check of the apparatus can be performed automatically.Type: ApplicationFiled: June 29, 2006Publication date: October 8, 2009Inventors: Mario Loncar, Christer Ahlmen, Stefan Broborg