Patents by Inventor Matti Huiku

Matti Huiku 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).

  • Patent number: 10646145
    Abstract: A reflective SpO2 measurement system includes a light source that emits light of at least a first and second wavelengths, and one or more detection devices forming a close detector positioned at a first distance from the light source and a far detector positioned at a second distance from the light source, wherein the second distance is greater than the first. The SpO2 measurement system is configured to operate in a high power mode to determine a calibration factor based on the comparison of light reflections detected by the close detector and the far detector. The system is further configured to operate in a low power mode to generate a low intensity light pulse, and detect a close reflection of the low intensity light pulse with the close detector. An SpO2 is then determined based on the close reflection of the low intensity light pulse and the calibration factor.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: May 12, 2020
    Assignee: General Electric Company
    Inventors: Otto Valtteri Pekander, Matti Huiku, Juha Virtanen
  • Publication number: 20190246967
    Abstract: A reflective SpO2 measurement system includes a light source that emits light of at least a first and second wavelengths, and one or more detection devices forming a close detector positioned at a first distance from the light source and a far detector positioned at a second distance from the light source, wherein the second distance is greater than the first. The SpO2 measurement system is configured to operate in a high power mode to determine a calibration factor based on the comparison of light reflections detected by the close detector and the far detector. The system is further configured to operate in a low power mode to generate a low intensity light pulse, and detect a close reflection of the low intensity light pulse with the close detector. An SpO2 is then determined based on the close reflection of the low intensity light pulse and the calibration factor.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 15, 2019
    Applicant: General Electric Company
    Inventors: Otto Valtteri Pekander, Matti Huiku, Juha Virtanen
  • Publication number: 20190076048
    Abstract: A method for detection of interference in impedance based monitoring of a subject by using a monitor is disclosed. The method comprising, connecting the subject to the monitor using one or more leads; and before current is applied to the subject, measuring voltage on the subject via at least one of the one or more leads and if any voltage is detected then the monitor indicates a warning. An impedance based monitor is disclosed, the monitor being connectable to a subject. The monitor is configured to measure voltage on the subject, before any current is applied to the subject, and if any voltage is detected then the monitor is configured to indicate a warning.
    Type: Application
    Filed: March 15, 2017
    Publication date: March 14, 2019
    Inventors: Panu Antero Takala, Kimmo Henrik Uutela, Mikael Bröckl, Matti Huiku
  • Patent number: 10092226
    Abstract: A mechanism for non-invasively monitoring blood characteristics of a subject is disclosed. To enable measurement of hemoglobin concentrations in a cost-effective way, a computational model is established that represents a relationship between a first variable indicative of total hemoglobin concentration and a set of variables that includes second variables indicative of light transmission through tissue and third variables indicative of concentration percentages of different hemoglobin species. In-vivo measurement signals are acquired from a subject and in-vivo values are determined for the second and third variables based on the in-vivo measurement signals. The first variable is then solved based on the in-vivo values of the second and third variables and the computational model.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: October 9, 2018
    Assignee: General Electric Company
    Inventors: Matti Huiku, Katja Urpalainen
  • Patent number: 9375183
    Abstract: A method for monitoring degradation a physiological sensor connected to a patient monitor is disclosed. A patient monitor, a patient monitor system, a physiological sensor, and a computer program product are also disclosed. In order to get an early warning of an imminent breakage or wear out of a physiological sensor and to increase the life time of the sensor without compromising patient safety, history data is collected for at least one sensor feature parameter into a predetermined memory location, wherein the collected history data is indicative of past characteristics of the sensor. The history data is retrieved from the predetermined memory location when the physiological sensor is connected to a patient monitor and a degradation measure indicative of the degree of degradation of the physiological sensor is determined for the physiological sensor based on the history data.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: June 28, 2016
    Assignee: General Electric Company
    Inventors: Matti Huiku, Heikki Joensuu
  • Patent number: 8715193
    Abstract: The invention relates to the determination of the clinical state of a subject. In order to bring about an uncomplicated method for monitoring the clinical state of a subject and for accomplishing a diagnostic scale, such as a nociception scale, on which a certain reading corresponds to the same level for all patients, a normalization transform is applied to a measurement signal containing physiological data obtained from a patient, whereby a normalized measurement signal having a predetermined value range is obtained. The normalization transform is dependent on predetermined history data, such as previous signal data of said measurement signal. A diagnostic index dependent on the normalized measurement signal is then formed, the diagnostic index serving as a measure of the clinical state of the patient. The diagnostic index may be formed based on one or more normalized measurement signals.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: May 6, 2014
    Assignee: General Electric Company
    Inventors: Panu Takala, Matti Huiku
  • Patent number: 8694067
    Abstract: A sensor, apparatus and method for non-invasively monitoring blood characteristics of a subject are disclosed. The sensor comprises an emitter unit configured to emit radiation through the tissue of the subject at a plurality of measurement wavelengths and a detector unit that comprises photo detectors. To achieve a simple sensor assembly, the photo detectors are together adapted to receive the radiation at the plurality of wavelengths and to produce in-vivo measurement signals corresponding to the plurality of measurement wavelengths, the in-vivo measurement signals being indicative of absorption caused by blood of the subject. Furthermore, the photo detectors are mounted so that optical paths from the emitter unit to the photo detectors are different, and the plurality of wavelengths are divided between the photo detectors so that two spectrally adjacent photo detectors have at least one common wavelength.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: April 8, 2014
    Assignee: General Electric Company
    Inventor: Matti Huiku
  • Publication number: 20140005491
    Abstract: A method for monitoring degradation a physiological sensor connected to a patient monitor is disclosed. A patient monitor, a patient monitor system, a physiological sensor, and a computer program product are also disclosed. In order to get an early warning of an imminent breakage or wear out of a physiological sensor and to increase the life time of the sensor without compromising patient safety, history data is collected for at least one sensor feature parameter into a predetermined memory location, wherein the collected history data is indicative of past characteristics of the sensor. The history data is retrieved from the predetermined memory location when the physiological sensor is connected to a patient monitor and a degradation measure indicative of the degree of degradation of the physiological sensor is determined for the physiological sensor based on the history data.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 2, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Matti Huiku, Heikki Joensuu
  • Patent number: 8574156
    Abstract: The invention relates to the determination of the clinical state of a subject. A respective adaptive transform is applied to at least one measurement signal acquired from the subject, each adaptive transform being dependent on previously acquired history data, and a diagnostic index is formed, which is dependent on the transformed measurement signal(s) and serves as a measure of the clinical state of the subject. In order to reliably evaluate the clinical state of a subject on a fixed diagnostic scale during changes in the state of the subject, some or all of the previously acquired history data on which an adaptive transform is currently dependent is replaced with other previously acquired history data when a predetermined event is detected. The predetermined event is indicative of a change in the respective measurement signal, and the introduction of the said other previously acquired history data sets the transform ready for the change.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: November 5, 2013
    Assignee: General Electric Company
    Inventors: Kimmo Uutela, Matti Huiku, Juha Virtanen
  • Patent number: 8571622
    Abstract: Method and pulse oximeter system for determining blood characteristics of a subject are disclosed. A pulse oximeter sensor for collecting plethysmographic data is also disclosed. In order to reduce the power consumption, time instants of systolic rises are estimated in at least one plethysmographic waveform of a subject and light emitting elements of a sensor are controlled according to the estimated time instants, thereby to collect signal samples from a plurality of plethysmographic waveforms of the subject during the systolic rises. A desired blood parameter, typically oxygen saturation, is then defined based on the signal samples collected during the systolic rises.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: October 29, 2013
    Assignee: General Electric Company
    Inventors: Matti Huiku, Juha Virtanen
  • Patent number: 8515514
    Abstract: Provided is a method of calibrating a pulse oximeter, in which the effects caused by tissue of a subject can be taken into account. A detector output signal is measured when living tissue of the subject is present between emitters and the detector in a sensor. Nominal calibration and nominal calibration characteristics are read from a memory, whereupon values for the same nominal characteristics for the sensor on living tissue of the subject are established using the detector output signal. Then, changes in the nominal calibration characteristics induced by the living tissue are calculated and a subject-specific calibration is formed by correcting the nominal calibration with the changes. Finally, the hemoglobin fractions are solved using the corrected nominal calibration.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: August 20, 2013
    Assignee: Datex-Ohmeda, Inc.
    Inventor: Matti Huiku
  • Publication number: 20130165757
    Abstract: A mechanism for non-invasively monitoring blood characteristics of a subject is disclosed. To enable measurement of hemoglobin concentrations in a cost-effective way, a computational model is established that represents a relationship between a first variable indicative of total hemoglobin concentration and a set of variables that includes second variables indicative of light transmission through tissue and third variables indicative of concentration percentages of different hemoglobin species. In-vivo measurement signals are acquired from a subject and in-vivo values are determined for the second and third variables based on the in-vivo measurement signals. The first variable is then solved based on the in-vivo values of the second and third variables and the computational model.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 27, 2013
    Applicant: General Electric Company
    Inventors: Matti Huiku, Katja Urpalainen
  • Patent number: 8412296
    Abstract: In order to provide a non-invasive and continuous concentration measurement with the technology of standard pulse oximeters, an a priori relationship is created, through an in-vivo tissue model including a nominal estimate of a tissue parameter indicative of the concentration of a blood substance. The a priori relationship is indicative of the effect of tissue on in-vivo measurement signals at a plurality of wavelengths, the in-vivo measurement signals being indicative of absorption caused by pulsed arterial blood. In-vivo measurement signals are acquired from in-vivo tissue at the plurality of wavelengths and a specific value of the tissue parameter is determined based on the a priori relationship, the specific value being such that it yields the effect of the in-vivo tissue on the in-vivo measurement signals consistent for the plurality of wavelengths. The specific value then represents the concentration of the substance in the blood.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: April 2, 2013
    Assignee: General Electric Company
    Inventor: Matti Huiku
  • Patent number: 8401605
    Abstract: A measuring apparatus, a physiological sensor, and an interface unit for determining blood parameters of a subject are disclosed. The sensor comprises an emitter unit comprising a first plurality of emitter elements configured to emit radiation at a second plurality of wavelengths and a detector unit configured to receive radiation generated by the emitter elements and transmitted through the tissue of the subject, wherein the detector unit is further configured to produce electric measurement signals indicative of absorption caused by the blood of the subject. The sensor or the interface unit is provided with a memory that stores emitter activation information for at least a third plurality of wavelengths, thereby to enable a monitoring unit operably connectable to the physiological sensor to employ a combination of wavelengths selected from the third plurality of wavelengths, wherein the third plurality is equal to or smaller than the second plurality.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: March 19, 2013
    Assignee: General Electric Company
    Inventor: Matti Huiku
  • Publication number: 20120253147
    Abstract: A calibration method for an apparatus for non-invasively monitoring blood characteristics of a subject is disclosed. The apparatus is provided with a computational model representing a relationship between in-vivo measurement signals obtained from the subject and the blood characteristics. The providing includes employing at least one tissue property variable in the computational model, in which the at least one tissue property variable is indicative of absorption and scattering characteristics of the subject's tissue. An arrangement for determining blood characteristics of a subject and a sensor for the arrangement are also disclosed.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Matti Huiku, Antti Tolonen, Victor Petrovich Ostroverkhov, Katja Urpalainen
  • Patent number: 8246546
    Abstract: A method and apparatus for monitoring fluid balance status of a subject are disclosed. A hemoglobin measure indicative of hemoglobin concentration in the blood of a subject and at least one physiological parameter responsive to blood volume changes in the subject are determined and concurrent behavior of the hemoglobin measure and the at least one physiological parameter is indicated to a user, thereby to give an indication of fluid balance status of the subject. The cause and/or reliability of the fluid balance status may also be indicated.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: August 21, 2012
    Assignee: General Electric Company
    Inventor: Matti Huiku
  • Publication number: 20120209095
    Abstract: A sensor, apparatus and method for non-invasively monitoring blood characteristics of a subject are disclosed. The sensor comprises an emitter unit configured to emit radiation through the tissue of the subject at a plurality of measurement wavelengths and a detector unit that comprises photo detectors. To achieve a simple sensor assembly, the photo detectors are together adapted to receive the radiation at the plurality of wavelengths and to produce in-vivo measurement signals corresponding to the plurality of measurement wavelengths, the in-vivo measurement signals being indicative of absorption caused by blood of the subject. Furthermore, the photo detectors are mounted so that optical paths from the emitter unit to the photo detectors are different, and the plurality of wavelengths are divided between the photo detectors so that two spectrally adjacent photo detectors have at least one common wavelength.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 16, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Matti Huiku
  • Publication number: 20120053432
    Abstract: Method and pulse oximeter system for determining blood characteristics of a subject are disclosed. A pulse oximeter sensor for collecting plethysmographic data is also disclosed. In order to reduce the power consumption, time instants of systolic rises are estimated in at least one plethysmographic waveform of a subject and light emitting elements of a sensor are controlled according to the estimated time instants, thereby to collect signal samples from a plurality of plethysmographic waveforms of the subject during the systolic rises. A desired blood parameter, typically oxygen saturation, is then defined based on the signal samples collected during the systolic rises.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 1, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Matti Huiku, Juha Virtanen
  • Patent number: 7925338
    Abstract: The invention relates to the determination of the anesthetic state of a patient. In order to achieve a mechanism that enables establishment and maintenance of balanced anesthesia, values are established for a set of diagnostic indices. The set includes at least two diagnostic indices of which a first diagnostic index is indicative of the level of hypnosis and a second diagnostic index of the level of nociception in the patient. The combination of the at least two index values obtained is employed for indicating the anesthetic state of the patient. The combination of the at least two index values may further be employed to control the administration of drugs to the patient.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: April 12, 2011
    Assignee: General Electric Company
    Inventor: Matti Huiku
  • Publication number: 20110077474
    Abstract: A method, arrangement and apparatus for assessing fluid balance status of a subject are disclosed. At least one physiological parameter responsive to blood volume changes in the subject is determined and a predetermined change in the ventilation of the subject is produced. The response that the predetermined change of ventilation causes in at least one of the at least one physiological parameter is then determined, thereby to obtain at least one measure of change. The fluid balance status of the subject may be assessed based on the at least one measure of change. The subject is typically connected to a ventilator and the predetermined change is produced by controlling the ventilator.
    Type: Application
    Filed: September 29, 2009
    Publication date: March 31, 2011
    Applicant: General Electric Company
    Inventor: Matti Huiku