Patents by Inventor Yoshihiro Sugo

Yoshihiro Sugo 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: 20190298180
    Abstract: A physiological information processing method includes: acquiring electrocardiogram data of a subject; acquiring pulse wave data of the subject; measuring the heart rate based on the electrocardiogram data; measuring the pulse wave transit time based on the electrocardiogram data and the pulse wave data; calculating a cardiac output based on the pulse wave transit time and heart rate which have been measured; calculating the systemic vascular resistance; and correcting the calculated cardiac output based on the systemic vascular resistance.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Inventors: Mami SAKAI, Yoshihiro SUGO
  • Patent number: 9591976
    Abstract: Method for measuring a blood volume is provided. At least two types of respiratory variation data; for instance, data pertinent to respiratory variations in stroke volume (SVV) data, data pertinent to respiratory variations in an amplitude of a pulse wave (PAV), a pulse wave transit time (PWTT) in a respiratory cycle, and a heart rate (HR) in a predetermined time, are measured, and patient's inherent coefficients ?, ?, and K are calculated, whereby a cardiac output can be determined by an equation CO=K (?*PWTT+?)*HR.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: March 14, 2017
    Assignee: NIHON KOHDEN CORPORATION
    Inventors: Yoshihiro Sugo, Tomoyuki Sakai, Mami Terao
  • Patent number: 9433361
    Abstract: A biological information monitor includes: a first measuring unit which measures a pulse wave propagation time of a patient; a second measuring unit which measures a blood pressure of the patient; a calculating unit which calculates an estimated blood pressure value of the patient based on the pulse wave propagation time of the patient; a setting unit which sets a threshold; and a determining unit which compares the estimated blood pressure value with the threshold. The second measuring unit is activated to measure the blood pressure of the patient at least one of at time intervals and at a time when an operator operates the second measuring unit, and the second measuring unit is activated to measure the blood pressure of the patient by the determining unit based on the comparison result.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: September 6, 2016
    Assignee: NIHON KOHDEN CORPORATION
    Inventors: Mitsushi Hyogo, Teiji Ukawa, Yoshihiro Sugo, Hiroko Hagiwara
  • Patent number: 9282906
    Abstract: A blood volume measuring method, apparatus and program for removing an artifact when used in an apparatus for analyzing respiratory variation of the stroke volume of a patient in order to determine the fluid response of the patient or adequately set artificial ventilation is provided.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: March 15, 2016
    Assignee: NIHON KOHDEN CORPORATION
    Inventors: Yoshihiro Sugo, Mitsushi Hyogo
  • Publication number: 20140121544
    Abstract: Method for measuring a blood volume is provided. At least two types of respiratory variation data; for instance, data pertinent to respiratory variations in stroke volume (SVV) data, data pertinent to respiratory variations in an amplitude of a pulse wave (PAV), a pulse wave transit time (PWTT) in a respiratory cycle, and a heart rate (HR) in a predetermined time, are measured, and patient's inherent coefficients ?, ?, and K are calculated, whereby a cardiac output can be determined by an equation CO=K(?*PWTT+?)*HR.
    Type: Application
    Filed: October 22, 2013
    Publication date: May 1, 2014
    Applicant: NIHON KOHDEN CORPORATION
    Inventors: Yoshihiro SUGO, Tomoyuki SAKAI, Mami TERAO
  • Patent number: 8649837
    Abstract: In order to measure a pulse rate and an oxygen saturation of a subject who is in an exercised state, each of two pulse wave signals obtained from the subject is separated into a signal component and a noise component. A frequency spectrum of the signal component and a frequency spectrum of the noise component are obtained. It is judged whether a body motion of the subject is occurred based on the frequency spectrum of the signal component and the frequency spectrum of the noise component. A pulsation frequency is determined based on the judgment as to the body motion. The pulse rate is calculated based on the pulsation frequency. The oxygen saturation is calculated based on a ratio of spectra of the two pulse wave signals corresponding to the pulsation frequency.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: February 11, 2014
    Assignee: Nihon Kohden Corporation
    Inventors: Yoshihiro Sugo, Naoki Kobayashi, Sunao Takeda
  • Patent number: 8591428
    Abstract: A method of measuring a blood volume, includes: reading individual specific information of a patient; estimating oxygen metabolism relating to a cardiac output of the patient; and acquiring the cardiac output based on the estimated oxygen metabolism.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: November 26, 2013
    Assignee: Nihon Kohden Corporation
    Inventor: Yoshihiro Sugo
  • Patent number: 8535234
    Abstract: An apparatus for measuring a blood volume, includes: a first calculator which calculates a first blood volume by using information on a cardiac output of a subject; and a second calculator which calculates a second blood volume by using information on oxygen metabolism of the subject.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: September 17, 2013
    Assignee: Nihon Kohden Corporation
    Inventor: Yoshihiro Sugo
  • Publication number: 20110060531
    Abstract: A blood volume measuring method includes: acquiring data of stroke volume variation at each respiratory rate, and storing the acquired data in a first buffer; reading an N1 number of the data stored in the first buffer, from the first buffer, and storing the N1 number of the data in a second buffer; excluding a part of the data stored in the second buffer, a value of each of which exceeds a first upper limit or falls below a first lower limit, from the data stored in the second buffer, and storing the other of the data stored in the second buffer, in a third buffer; acquiring a deviation of each of the data stored in the third buffer, from a median value of the data stored in the third buffer, excluding a part of the data stored in the third buffer, the deviation of each of which exceeds a second upper limit or falls below a second lower limit, from the data stored in the third buffer, and storing the other of the data stored in the third buffer, in a fourth buffer; determining whether N2/N1 is within an allo
    Type: Application
    Filed: September 9, 2010
    Publication date: March 10, 2011
    Applicant: NIHON KOHDEN CORPORATION
    Inventors: Yoshihiro SUGO, Mitsushi HYOGO
  • Publication number: 20110054328
    Abstract: A biological information monitor includes: a first measuring unit which measures a pulse wave propagation time of a patient; a second measuring unit which measures a blood pressure of the patient; a calculating unit which calculates an estimated blood pressure value of the patient based on the pulse wave propagation time of the patient; a setting unit which sets a threshold; and a determining unit which compares the estimated blood pressure value with the threshold. The second measuring unit is activated to measure the blood pressure of the patient at least one of at time intervals and at a time when an operator operates the second measuring unit, and the second measuring unit is activated to measure the blood pressure of the patient by the determining unit based on the comparison result.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 3, 2011
    Applicant: NIHON KOHDEN CORPORATION
    Inventors: Mitsushi HYOGO, Teiji UKAWA, Yoshihiro SUGO, Hiroko HAGIWARA
  • Publication number: 20100268518
    Abstract: An apparatus for measuring a blood volume, includes: a first calculator which calculates a first blood volume by using information on a cardiac output of a subject; and a second calculator which calculates a second blood volume by using information on oxygen metabolism of the subject.
    Type: Application
    Filed: April 16, 2010
    Publication date: October 21, 2010
    Applicant: NIHON KOHDEN CORPORATION
    Inventor: Yoshihiro SUGO
  • Publication number: 20100268101
    Abstract: A method of measuring a blood volume, includes: reading individual specific information of a patient; estimating oxygen metabolism relating to a cardiac output of the patient; and acquiring the cardiac output based on the estimated oxygen metabolism.
    Type: Application
    Filed: April 16, 2010
    Publication date: October 21, 2010
    Applicant: NIHON KOHDEN CORPORATION
    Inventor: Yoshihiro Sugo
  • Patent number: 7615011
    Abstract: A first member is adapted to measure an electrocardiogram of a patient. A second member is adapted to measure a peripheral pulse wave of the patient. A first calculator calculates a pulse wave propagation time (PWTT) and a heart rate (HR) of the patient based on the electrocardiogram and the peripheral pulse wave. A second calculator calculates a cardiac output (CO) of the patient with an equation of CO=(?K·PWTT+?K)·HR, where ?, ? and K are coefficients inherent to the patient.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: November 10, 2009
    Assignee: Nihon Kohden Corporation
    Inventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
  • Publication number: 20090024014
    Abstract: In order to measure a pulse rate and an oxygen saturation of a subject who is in an exercised state, each of two pulse wave signals obtained from the subject is separated into a signal component and a noise component. A frequency spectrum of the signal component and a frequency spectrum of the noise component are obtained. It is judged whether a body motion of the subject is occurred based on the frequency spectrum of the signal component and the frequency spectrum of the noise component. A pulsation frequency is determined based on the judgment as to the body motion. The pulse rate is calculated based on the pulsation frequency. The oxygen saturation is calculated based on a ratio of spectra of the two pulse wave signals corresponding to the pulsation frequency.
    Type: Application
    Filed: July 17, 2008
    Publication date: January 22, 2009
    Applicant: NIHON KOHDEN CORPORATION
    Inventors: Yoshihiro SUGO, Naoki KOBAYASHI, Sunao TAKEDA
  • Patent number: 7402138
    Abstract: A first member is adapted to measure an electrocardiogram of a patient. A second member is adapted to measure a peripheral pulse wave of the patient. A first calculator calculates a pulse wave propagation time (PWTT) and a heart rate (HR) of the patient based on the electrocardiogram and the peripheral pulse wave. A second calculator calculates a cardiac output (CO) of the patient with an equation of CO=(?K·PWTT+?K)·HR, where ?, ? and K are coefficients inherent to the patient.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: July 22, 2008
    Assignee: Nihon Kohden Corporation
    Inventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
  • Publication number: 20070167852
    Abstract: A first member is adapted to measure an electrocardiogram of a patient. A second member is adapted to measure a peripheral pulse wave of the patient. A first calculator calculates a pulse wave propagation time (PWTT) and a heart rate (HR) of the patient based on the electrocardiogram and the peripheral pulse wave. A second calculator calculates a cardiac output (CO) of the patient with an equation of CO=(?K·PWTT+?K)·HR, where ?, ? and K are coefficients inherent to the patient.
    Type: Application
    Filed: March 30, 2007
    Publication date: July 19, 2007
    Inventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
  • Publication number: 20050222514
    Abstract: A first member is adapted to measure an electrocardiogram of a patient. A second member is adapted to measure a peripheral pulse wave of the patient. A first calculator calculates a pulse wave propagation time (PWTT) and a heart rate (HR) of the patient based on the electrocardiogram and the peripheral pulse wave. A second calculator calculates a cardiac output (CO) of the patient with an equation of CO=(?K·PWTT+?K)·HR, where ?, ? and K are coefficients inherent to the patient.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 6, 2005
    Inventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
  • Patent number: 6652466
    Abstract: A vital sign monitoring apparatus has estimated blood pressure calculation device for calculating estimated systolic blood pressure and estimated diastolic blood pressure from information relevant to blood pressure successively measured based on the relationship between information relevant to blood pressure and systolic blood pressure and the relationship between information relevant to blood pressure and diastolic blood pressure, systolic and diastolic duration measurement device for successively measuring a systolic duration and a diastolic duration, and blood flow volume calculation device for calculating a blood flow volume based on the estimated systolic blood pressure and the estimated diastolic blood pressure successively calculated and the systolic duration and the diastolic duration successively measured.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: November 25, 2003
    Assignee: Nihon Kohden Corporation
    Inventors: Yoshihiro Sugo, Mitsushi Hyogo, Hideo Ozawa
  • Patent number: 6547740
    Abstract: A blood pressure monitoring apparatus includes a blood pressure measuring device for measuring blood pressure employing a cuff, a pulse wave propagation time measuring device for measuring the pulse wave propagation time, a hemodynamics measuring device for measuring the hemodynamics, and a control device for controlling the blood pressure measuring device on the basis of a change in pulse wave propagation time measured by the pulse wave propagation time measuring device and a change in hemodynamics measured by the hemodynamics measuring device. The control device controls the blood pressure measuring device to measure the blood pressure on the basis of the amount of change and change trend in the pulse wave propagation time measured by the pulse wave propagation time measuring device, and the amount of change and change trend in the hemodynamics measured by the hemodynamics measuring device.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: April 15, 2003
    Assignee: Nihon Kohden Corporation
    Inventors: Yoshihiro Sugo, Rie Tanaka, Mitsushi Hyogo
  • Publication number: 20020151805
    Abstract: A vital sign monitoring apparatus has estimated blood pressure calculation means 30 for calculating estimated systolic blood pressure and estimated diastolic blood pressure from information relevant to blood pressure successively measured based on the relationship between information relevant to blood pressure and systolic blood pressure and the relationship between information relevant to blood pressure and diastolic blood pressure, systolic and diastolic duration measurement means 20 for successively measuring a systolic duration and a diastolic duration, and blood flow volume calculation means 40 for calculating a blood flow volume based on the estimated systolic blood pressure and the estimated diastolic blood pressure successively calculated and the systolic duration and the diastolic duration successively measured.
    Type: Application
    Filed: February 28, 2002
    Publication date: October 17, 2002
    Applicant: NIHON KOHDEN CORPORATION
    Inventors: Yoshihiro Sugo, Mitsushi Hyogo, Hideo Ozawa