Patents by Inventor Christer Strom
Christer Strom 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: 9220857Abstract: A ventilator intended to be connected to a patient for breathing therapy has a control unit having an input for receiving EMG signals from an EMG detector and an output for an EMG based control signal and a pneumatic unit for generating breathing gas flows dependent on the EMG based control signal is described. The ventilator has a detector for determining a parameter related to breathing dynamics for the patient, this detector being connected to the control unit and control unit controlling the pneumatic unit dependent on the parameter related to breathing dynamics in the case of loss of EMG signals at the input.Type: GrantFiled: May 29, 2013Date of Patent: December 29, 2015Assignee: Maquet Critical Care ABInventors: Urban Blomberg, Fredrik Jalde, Ake Larsson, Christer Strom
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Publication number: 20130255686Abstract: A ventilator intended to be connected to a patient for breathing therapy has a control unit having an input for receiving EMG signals from an EMG detector and an output for an EMG based control signal and a pneumatic unit for generating breathing gas flows dependent on the EMG based control signal is described. The ventilator has a detector for determining a parameter related to breathing dynamics for the patient, this detector being connected to the control unit and control unit controlling the pneumatic unit dependent on the parameter related to breathing dynamics in the case of loss of EMG signals at the input.Type: ApplicationFiled: May 29, 2013Publication date: October 3, 2013Inventors: Urban Blomberg, Fredrik Jalde, Ake Larsson, Christer Strom
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Patent number: 8469026Abstract: A ventilator intended to be connected to a patient for breathing therapy has a control unit having an input for receiving EMG signals from an EMG detector and an output for an EMG based control signal and a pneumatic unit for generating breathing gas flows dependent on the EMG based control signal is described. The ventilator has a detector for determining a parameter related to breathing dynamics for the patient, this detector being connected to the control unit and control unit controlling the pneumatic unit dependent on the parameter related to breathing dynamics in the case of loss of EMG signals at the input.Type: GrantFiled: June 9, 2005Date of Patent: June 25, 2013Assignee: Maquet Critical Care ABInventors: Urban Blomberg, Fredrik Jalde, Åke Larsson, Christer Ström
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Patent number: 7909034Abstract: The present invention relates to a method of delivering combined positive and negative pressure assist ventilation to a patient, wherein a positive pressure is applied to the patient's airways to inflate the patient's lungs, a negative pressure is applied around the patient's ribcage and/or abdomen in order to reduce a load imposed by the ribcage and/or abdomen on the patient's lungs, and application of the positive and negative pressures is synchronized.Type: GrantFiled: October 21, 2004Date of Patent: March 22, 2011Assignee: Maquet Critical Care ABInventors: Christer Sinderby, Jennifer Beck, Christer Ström
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Publication number: 20080308104Abstract: A ventilator intended to be connected to a patient for breathing therapy has a control unit having an input for receiving EMG signals from an EMG detector and an output for an EMG based control signal and a pneumatic unit for generating breathing gas flows dependent on the EMG based control signal is described. The ventilator has a detector for determining a parameter related to breathing dynamics for the patient, this detector being connected to the control unit and control unit controlling the pneumatic unit dependent on the parameter related to breathing dynamics in the case of loss of EMG signals at the input.Type: ApplicationFiled: June 9, 2005Publication date: December 18, 2008Inventors: Urban Blomberg, Fredrik Jalde, Ake Larsson, Christer Strom
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Publication number: 20080115786Abstract: The present invention relates to a method of delivering combined positive and negative pressure assist ventilation to a patient, wherein a positive pressure is applied to the patient's airways to inflate the patient's lungs, a negative pressure is applied around the patient's ribcage and/or abdomen in order to reduce a load imposed by the ribcage and/or abdomen on the patient's lungs, and application of the positive and negative pressures is synchronized.Type: ApplicationFiled: October 21, 2004Publication date: May 22, 2008Inventors: Christer Sinderby, Jennifer Beck, Christer Strom
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Patent number: 7121277Abstract: A ventilator has an inspiratory unit and an expiratory valve for regulating a flow of breathing gas and a control unit for controlling the inspiratory unit and the expiratory valve. In order to facilitate the opening of collapsed alveoli in the lungs, the control unit controls the inspiratory unit and the expiratory valve to generate a recruitment phase with an elevated basic pressure for the flow of breathing gas upon which a number of breaths is superimposed at a faster breathing rate.Type: GrantFiled: August 3, 2001Date of Patent: October 17, 2006Assignee: Maquet Critical Care ABInventor: Christer Ström
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Patent number: 7000610Abstract: A high-frequency oscillator ventilator has a first gas conduit with an opening for gas connection with a patient's airways and a bias gas flow inlet and a bias flow outlet disposed to define therebetween a flow path for a bias gas within the first conduit. An oscillator operable to alternately introduce a volume of additional gas from a source into, and to withdraw at least the same volume of gas from, the first gas conduit, thereby inducing pressure oscillations in gas within the first conduit to move gas along a path intersecting the flow path for a bias gas alternately into and out of the opening at a predetermined high-frequency dependent on the output of a control signal generator.Type: GrantFiled: December 11, 2000Date of Patent: February 21, 2006Assignee: Maquet Critcal Care ABInventors: Johan Bennarsten, Goran Rydgren, Christer Strom
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Patent number: 6840241Abstract: An apparatus for determination of a recruitable volume in a lung has a control system connectable to a pneumatic unit and to a measurement system and operable to, at a first point in time, regulate the pneumatic unit to generate a first test breath having predetermined parameters with respect to flow and/or pressure of the gas flow, register volume and pressure in the lung during the first test breath, measured by the measurement system. The control system is at a operable second point in time, to regulate the pneumatic unit to generate a second test breath identical to the first test breath, register volume and pressure in the lung during the second test breath, measured by the measurement system. The control system compares the registered volume and pressure for the first test breath and the second test breath, and determines a recruitable volume based on the comparison.Type: GrantFiled: September 19, 2003Date of Patent: January 11, 2005Assignee: Maquet Critical Care ABInventor: Christer Ström
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Publication number: 20040055599Abstract: An apparatus for determination of a recruiatable volume in a lung has a control system connectable to a pneumatic unit and to a measurement system and operable to, at a first point in time, regulate the pneumatic unit to generate a first test breath having predetermined parameters with respect to flow and/or pressure of the gas flow, register volume and pressure in the lung during the first test breath, measured by the measurement system and at a second point in time, to regulate the pneumatic unit to generate a second test breath identical to the first test breath, register volume and pressure in the lung during the second test breath, measured by the measurement system, compare the registered volume and pressure for the first test breath and the second test breath, and determine a recruiatable volume based on the comparison.Type: ApplicationFiled: September 19, 2003Publication date: March 25, 2004Applicant: Siemens-Elema ABInventor: Christer Strom
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Patent number: 6679258Abstract: A ventilator for connection to a patient to provide assisted breathing, has a gas flow generator, a pressure meter, a flow meter and a control unit, which determines a gas pressure, on the basis of a pre-set tidal volume for the patient and measurement signals from the pressure meter and flow meter, for each breath and which regulates the gas flow generator so that it generates the determined gas pressure. An improved breathing mode, better tailored to the patient, is achieved by the control unit also determining the gas pressure to be generated by the gas flow generator on the basis of mechanical resistances and a variable corresponding to the aggregate effect of the resistance and elastance of the lungs.Type: GrantFiled: August 20, 1999Date of Patent: January 20, 2004Assignee: Siemens Elema ABInventor: Christer Ström
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Patent number: 6533730Abstract: In a method for assessing pulmonary stress, a flow of respiratory gas is supplied to the lungs of a subject, an ensuing pressure is measured in relation to time and the pressure-time relationship is analyzed. In this analysis, the profile of the pressure-time relationship is determined. In summary, the profile is straight when no stress is present, is convex when there is a risk for over-distension, and is concave when alveolar units are opened up. Implemented in a breathing apparatus the method can be used to assist an operator in diagnostic and therapeutic considerations in relation to a patient.Type: GrantFiled: December 15, 2000Date of Patent: March 18, 2003Assignee: Siemens AktiengesellschaftInventor: Christer Ström
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Patent number: 6510851Abstract: In a method and arrangement for evaluating effective flow resistance of a patient breathing circuit connected to a mechanical breathing assist device, a flow controller is operable to temporarily introduce an occlusion to the gas flow within the breathing circuit at a time after the end of an inspiration phase of a breathing cycle provided by the breathing assist device. A sensor unit 34 has a flow sensor for measuring gas flow within the circuit and a pressure sensor for measuring gas pressures within the circuit. An evaluating unit receives measurements from the sensor unit, to determine for a measured gas flow a value of a pressure drop within the breathing circuit after the introduction of the occlusion, and establishes a relationship between the calculated pressure drop and the measured gas flow, such as based on the known Blasius formula.Type: GrantFiled: June 26, 2001Date of Patent: January 28, 2003Assignee: Siemens-Elema ABInventors: Göran Rydin, Christer Ström, Johan Bennarsten
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Publication number: 20020082512Abstract: A ventilator has an inspiratory unit and an expiratory valve for regulating a flow of breathing gas and a control unit for controlling the inspiratory unit and the expiratory valve. In order to facilitate the opening of collapsed alveoli in the lungs, the control unit controls the inspiratory unit and the expiratory valve to generate a recruitment phase with an elevated basic pressure for the flow of breathing gas upon which a number of breaths is superimposed at a faster breathing rate.Type: ApplicationFiled: August 3, 2001Publication date: June 27, 2002Applicant: Siemens-Elema ABInventor: Christer Strom
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Patent number: 6371115Abstract: A device for the supply of a gas from a respirator/anaesthesia device to a bedridden patient has at least one gas tube and a connecting interface, which can be connected to the patient, and an adjustable holding device for the gas tube and for the connecting interface. In order to prevent leaks, injury to the patient or damages to the gas tubes when the patient moves or changes position, the device is provided with at least one sensor and the holding device is provided with control arrangement for controlling its movements. The sensor detects movement of the patient is connected via the connecting interface, and a signal generated by the sensor and supplied to the control arrangement which, dependent thereon, controls the holding device such that its movements and therefore the movements of the connecting interface automatically follow the movements of the patient.Type: GrantFiled: February 24, 2000Date of Patent: April 16, 2002Assignee: Siemens Elema ABInventors: Göran Cewers, Christer Ström
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Publication number: 20020020410Abstract: in a method and arrangement for evaluating effective flow resistance of a patient breathing circuit connected to a mechanical breathing assist device, a flow controller is operable to temporarily introduce an occlusion to the gas flow within the breathing circuit at a time after the end of an inspiration phase of a breathing cycle provided by the breathing assist device. A sensor unit 34 has a flow sensor for measuring gas flow within the circuit and a pressure sensor for measuring gas pressures within the circuit. An evaluating unit receives measurements from the sensor unit, to determine for a measured gas flow a value of a pressure drop within the breathing circuit after the introduction of the occlusion, and establishes a relationship between the calculated pressure drop and the measured gas flow, such as based on the known Blasius formula.Type: ApplicationFiled: June 26, 2001Publication date: February 21, 2002Inventors: Goran Rydin, Christer Strom, Johan Bennarsten
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Publication number: 20010003984Abstract: A high-frequency oscillator ventilator has a first gas conduit with an opening for gas connection with a patient's airways and a bias gas flow inlet and a bias flow outlet disposed to define therebetween a flow path for a bias gas within the first conduit. An oscillator operable to alternately introduce a volume of additional gas from a source into, and to withdraw at least the same volume of gas from, the first gas conduit, thereby inducing pressure oscillations in gas within the first conduit to move gas along a path intersecting the flow path for a bias gas alternately into and out of the opening at a predetermined high-frequency dependent on the output of a control signal generator.Type: ApplicationFiled: December 11, 2000Publication date: June 21, 2001Applicant: Siemens Elema ABInventors: Johan Bennarsten, Goran Rydgren, Christer Strom
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Publication number: 20010004677Abstract: In a method for assessing pulmonary stress, a flow of respiratory gas is supplied to the lungs of a subject, an ensuing pressure is measured in relation to time and the pressure-time relationship is analyzed. In this analysis, the profile of the pressure-time relationship is determined. In summary, the profile is straight when no stress is present, is convex when there is a risk for over-distension, and is concave when alveolar units are opened up. Implemented in a breathing apparatus the method can be used to assist an operator in diagnostic and therapeutic considerations in relation to a patient.Type: ApplicationFiled: December 15, 2000Publication date: June 21, 2001Applicant: Siemens-Elema ABInventor: Christer Strom
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Patent number: 6240920Abstract: In a method and apparatus for determining at least one parameter related to a patient's spontaneous attempts at inspiration and/or the patient's respiratory effort in attempts at spontaneous inspiration, a pressure gradient is determined in relation to a known apparatus pressure and time, the pressure gradient being generated by the patient at inspiration, a residual positive pressure in the patient's lungs is determined and an output signal is generated. The output signal can represent determined parameters as well as other related calculated results. The pressure gradient can be extrapolated against residual positive pressure, and both a delay for respiratory assistance and true inspiratory effort can be determined.Type: GrantFiled: April 7, 1999Date of Patent: June 5, 2001Assignee: Siemens Elema ABInventor: Christer Ström
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Patent number: 5937853Abstract: A ventilator for respirator treatment includes a gas delivery unit and a regulating unit arranged to control the gas delivery unit to deliver gas to a patient according to prescribed parameter values to obtain sufficient ventilation of the patient. Sensors are provided for sensing respiration efforts of the patient and to control the regulating unit to adapt an operation cycle of the gas delivery unit to sensed respiration efforts of the patient. The regulating unit controls the gas delivery unit also to deliver a pressure or volume support to the respiration of the patient to a predetermined resulting total pressure or volume level. If an apnea exceeding a predetermined length of time is detected by the sensor, the regulating unit controls the gas delivery unit to deliver gas to the patient according to the aforementioned prescribed parameter.Type: GrantFiled: November 6, 1996Date of Patent: August 17, 1999Assignee: Siemens Elema ABInventor: Christer Strom