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).

  • Publication number: 20200206448
    Abstract: 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: Application
    Filed: June 8, 2018
    Publication date: July 2, 2020
    Inventor: Christer AHLMÉN
  • Publication number: 20170224234
    Abstract: 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: Application
    Filed: October 16, 2014
    Publication date: August 10, 2017
    Applicant: MAQUET CRITICAL CARE AB
    Inventors: Christer AHLMEN, Mario LONCAR, Par EMTELL, Mikael KOCK
  • Patent number: 9199056
    Abstract: 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: Grant
    Filed: January 19, 2010
    Date of Patent: December 1, 2015
    Assignee: Maquet Critical Care AB
    Inventors: Mario Loncar, Mats Wallin, Christer Ahlmén
  • Publication number: 20150250976
    Abstract: 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: Application
    Filed: September 12, 2013
    Publication date: September 10, 2015
    Applicant: MAQUET CRITICAL CARE AB
    Inventors: Mats Wallin, Mario Loncar, Christer Ahlmén, Pär Emtell
  • Patent number: 8978652
    Abstract: 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: Grant
    Filed: November 14, 2007
    Date of Patent: March 17, 2015
    Assignee: Maquet Critical Care AB
    Inventors: Christer Ahlmén, Marlo Loncar
  • Patent number: 8539950
    Abstract: 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: Grant
    Filed: February 27, 2007
    Date of Patent: September 24, 2013
    Assignee: Maquet Critical Care AB
    Inventors: Christer Ahlmén, Stefan Broborg
  • Patent number: 8459262
    Abstract: 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: Grant
    Filed: December 21, 2006
    Date of Patent: June 11, 2013
    Assignee: Maquet Critical Care AB
    Inventors: Christer Ahlmén, Pär Emtell, Petter Videbrink, Kin-Chun Wong, Mikael Kock
  • Patent number: 8371298
    Abstract: 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: Grant
    Filed: December 6, 2005
    Date of Patent: February 12, 2013
    Assignee: Maquet Critical Care AB
    Inventors: Magnus Hallbäck, Mario Loncar, Pär Emtell, Christer Ahlmén
  • Patent number: 8210169
    Abstract: 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: Grant
    Filed: July 14, 2005
    Date of Patent: July 3, 2012
    Assignee: Maquet Critical Care AB
    Inventors: Christer Ahlmén, Mario Loncar
  • Patent number: 8205610
    Abstract: 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: Grant
    Filed: June 29, 2005
    Date of Patent: June 26, 2012
    Assignee: Maquet Critical Care AB
    Inventors: Christer Ahlmén, Ake Larsson
  • Patent number: 8127762
    Abstract: 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: Grant
    Filed: June 29, 2006
    Date of Patent: March 6, 2012
    Assignee: Maquet Critical Care AB
    Inventors: Mario Loncar, Christer Ahlmén, Stefan Broborg
  • Publication number: 20120031402
    Abstract: 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: Application
    Filed: January 19, 2010
    Publication date: February 9, 2012
    Inventors: Mario Loncar, Mats Wallin, Christer Ahlmén
  • Publication number: 20110048417
    Abstract: 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: Application
    Filed: February 27, 2007
    Publication date: March 3, 2011
    Inventors: Christer Ahlmén, Stefan Broborg
  • Publication number: 20110017211
    Abstract: 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) between
    Type: Application
    Filed: November 14, 2007
    Publication date: January 27, 2011
    Applicant: MAQUET CRITICAL CARE AB
    Inventors: Christer Ahlmén, Marlo Loncar
  • Publication number: 20100224184
    Abstract: 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: Application
    Filed: June 29, 2005
    Publication date: September 9, 2010
    Inventors: Christer Ahlmén, Ake Larsson
  • Publication number: 20090277448
    Abstract: 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: Application
    Filed: December 21, 2006
    Publication date: November 12, 2009
    Inventors: Christer Ahlmén, Pär Emtell, Petter Videbrink, Kin-Chun Wong, Mikael Kock
  • Publication number: 20090250054
    Abstract: 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: Application
    Filed: June 29, 2006
    Publication date: October 8, 2009
    Inventors: Mario Loncar, Christer Ahlmen, Stefan Broborg
  • Publication number: 20090165787
    Abstract: 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: Application
    Filed: July 14, 2005
    Publication date: July 2, 2009
    Inventors: Christer Ahlmén, Mario Loncar
  • Publication number: 20080289628
    Abstract: 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: Application
    Filed: December 6, 2005
    Publication date: November 27, 2008
    Inventors: Magnus Hallback, Mario Loncar, Par Emtell, Christer Ahlmen
  • Patent number: 7347207
    Abstract: An anaesthetic device has a manual ventilation bag, a mechanical ventilator and a user interface for setting an operating mode, including mechanical ventilation via the mechanical ventilator and manual ventilation via the manual ventilation bag, and for setting parameter values for the operating mode that has been set. The anaesthetic device further has a remote control for wireless transmission of commands to the user interface. The user interface is adapted to carry out the commands from the remote control only when the anaesthetic device is set for manual ventilation.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: March 25, 2008
    Assignee: Maquet Critical Care AB
    Inventors: Christer Ahlmen, Mario Loncar, Petter Videbrink