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).

  • Patent number: 11426082
    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: Grant
    Filed: March 18, 2019
    Date of Patent: August 30, 2022
    Assignee: NIHON KOHDEN CORPORATION
    Inventors: Mami Sakai, Yoshihiro Sugo
  • Publication number: 20220192519
    Abstract: A physiological information processing method includes a step of acquiring a parameter related to an amount of blood delivered from a heart of a subject or stiffness of a blood vessel of the subject; a step of displaying a trend graph indicating a change over time in the parameter in a graph display region; a step of determining a reference value of the parameter in accordance with an input operation of a user; and a step of displaying a reference guideline indicating the reference value of the parameter in the graph display region.
    Type: Application
    Filed: December 16, 2021
    Publication date: June 23, 2022
    Applicant: NIHON KOHDEN CORPORATION
    Inventors: Yoshiharu HARADA, Yoshihiro SUGO, Sayaka YAMAZAKI, Makiko FUMOTO
  • Patent number: 11172820
    Abstract: A physiological information processing method includes: acquiring electrocardiogram data from a subject; acquiring pulse wave data from the subject; measuring a plurality of RR intervals based on the acquired electrocardiogram data; measuring a plurality of pulse wave transit times based on the acquired electrocardiogram data and the acquired pulse wave data; calculating, based on the measured RR intervals and the measured pulse wave transit times during a given time period, a parameter related to correlation between the measured RR intervals and the measured pulse wave transit times; and outputting the calculated parameter.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: November 16, 2021
    Assignee: NIHON KOHDEN CORPORATION
    Inventors: Yoshihiro Sugo, Yoshiharu Harada, Tomoyuki Sakai, Mami Sakai
  • Publication number: 20210169348
    Abstract: A method includes: acquiring electrocardiogram data of a subject; acquiring pulse wave data of the subject; calculating RR intervals in a predetermined time interval based on the electro-cardiogram data; calculating pulse wave transit times (PWTT) in the predetermined time interval based on the electrocardiogram data and the pulse wave data; calculating a pulse wave transit time variation (PWTTV) in the predetermined time interval based on the PWTT in the predetermined time interval; determining whether the PWTTV in the predetermined time interval satisfies a predetermined condition associated with previously calculated PWTTV or not; calculating corrected values (PWTT?) of the PWTT based on the PWTT and the RR intervals in a case where the PWTTV does not satisfy the predetermined condition; and determining candidate values (PWTT) of the PWTT based on the PWTT and PWTT?.
    Type: Application
    Filed: August 23, 2019
    Publication date: June 10, 2021
    Applicant: NIHON KOHDEN CORPORATION
    Inventors: Mami SAKAI, Yoshihiro SUGO
  • Publication number: 20210121079
    Abstract: An apparatus for measuring hemodynamic parameters that can measure information relating to a cardiac contraction function of a subject with a higher accuracy and with a light burden of the subject is provided. An apparatus for measuring hemodynamic parameters includes: an electrocardiogram acquiring interface that acquires an electrocardiogram of a subject; a pulse wave acquiring interface that acquires a pulse wave of the cranio-cervical region of the subject; and a calculator that calculates information relating to cardiac functions of the subject, based on a pulse wave transit time obtained from the electrocardiogram and the pulse wave.
    Type: Application
    Filed: October 14, 2020
    Publication date: April 29, 2021
    Inventors: Yoshihiro SUGO, Yoshiharu HARADA, Mami SAKAI
  • Publication number: 20210085197
    Abstract: A physiological information measurement method includes the steps of: measuring a first pulse wave in a first portion of a subject; measuring a second pulse wave in a second portion of the subject; acquiring a corrected waveform data set that is based on the first and second waveforms, in which at least one of the corrected waveform data set is a waveform that is corrected at least one of the first and second waveforms based on a phase difference between a first waveform corresponding to the first pulse wave, and a second waveform corresponding to the second pulse wave; and outputting a Lissajous figure based on the corrected waveform data set.
    Type: Application
    Filed: September 21, 2020
    Publication date: March 25, 2021
    Inventors: Yoshihiro SUGO, Yoshiharu HARADA, Mami SAKAI
  • Publication number: 20190343387
    Abstract: A physiological information processing method includes: acquiring electrocardiogram data from a subject; acquiring pulse wave data from the subject; measuring a plurality of RR intervals based on the acquired electrocardiogram data; measuring a plurality of pulse wave transit times based on the acquired electrocardiogram data and the acquired pulse wave data; calculating, based on the measured RR intervals and the measured pulse wave transit times during a given time period, a parameter related to correlation between the measured RR intervals and the measured pulse wave transit times; and outputting the calculated parameter.
    Type: Application
    Filed: April 24, 2019
    Publication date: November 14, 2019
    Inventors: Yoshihiro SUGO, Yoshiharu HARADA, Tomoyuki SAKAI, Mami SAKAI
  • 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: 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
  • 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
  • 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