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).
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Publication number: 20100268101Abstract: 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: ApplicationFiled: April 16, 2010Publication date: October 21, 2010Applicant: NIHON KOHDEN CORPORATIONInventor: Yoshihiro Sugo
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Patent number: 7615011Abstract: 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: GrantFiled: March 30, 2007Date of Patent: November 10, 2009Assignee: Nihon Kohden CorporationInventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
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Publication number: 20090024014Abstract: 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: ApplicationFiled: July 17, 2008Publication date: January 22, 2009Applicant: NIHON KOHDEN CORPORATIONInventors: Yoshihiro SUGO, Naoki KOBAYASHI, Sunao TAKEDA
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Patent number: 7402138Abstract: 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: GrantFiled: March 31, 2005Date of Patent: July 22, 2008Assignee: Nihon Kohden CorporationInventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
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Publication number: 20070167852Abstract: 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: ApplicationFiled: March 30, 2007Publication date: July 19, 2007Inventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
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Publication number: 20050222514Abstract: 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: ApplicationFiled: March 31, 2005Publication date: October 6, 2005Inventors: Yoshihiro Sugo, Takeshi Akiyama, Keisuke Uchida, Sunao Takeda
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Patent number: 6652466Abstract: 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: GrantFiled: February 28, 2002Date of Patent: November 25, 2003Assignee: Nihon Kohden CorporationInventors: Yoshihiro Sugo, Mitsushi Hyogo, Hideo Ozawa
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Patent number: 6547740Abstract: 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: GrantFiled: May 16, 2001Date of Patent: April 15, 2003Assignee: Nihon Kohden CorporationInventors: Yoshihiro Sugo, Rie Tanaka, Mitsushi Hyogo
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Publication number: 20020151805Abstract: 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: ApplicationFiled: February 28, 2002Publication date: October 17, 2002Applicant: NIHON KOHDEN CORPORATIONInventors: Yoshihiro Sugo, Mitsushi Hyogo, Hideo Ozawa
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Publication number: 20020002339Abstract: The blood pressure monitoring apparatus includes blood pressure measuring device for measuring the blood pressure employing a cuff, pulse wave propagation time measuring device for measuring the pulse wave propagation time, hemodynamics measuring device for measuring the hemodynamics, and 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, wherein 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: ApplicationFiled: May 16, 2001Publication date: January 3, 2002Applicant: NIHON KOHDEN CORPORATIONInventors: Yoshihiro Sugo, Rie Tanaka, Mitsushi Hyogo
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Patent number: 6241682Abstract: A pacing-pulse detecting circuit 3 detects pacing pulses from an electrocardiogram signal led from an electrocardiogram electrode 1. A mode-status judging means 21 judges a mode status, a pacing mode or a nonpacing mode, on the basis of the pacing pulse detected. The detect result is transmitted to a CPU 5. The CPU 5 causes a display device 10 to display the result. An operator sees the display and operates a key 22, and gives an instruction to start a blood pressure measurement to the CPU 5. The CPU 5 drives a pump 13 and an exhaust valve 14 to supply and discharge air to and from a cuff 11, and measures a blood pressure by use of pressure data led from a pressure sensor 15.Type: GrantFiled: August 16, 2000Date of Patent: June 5, 2001Assignee: Nihon Kohden CorporationInventors: Ryoichi Ochiai, Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen
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Patent number: 6129677Abstract: An apparatus for non-invasion heart monitoring includes electrocardiogram measuring means (1) for measuring electrocardiograms, pulse wave measuring means (2) for measuring pulse waves, and a CPU (30) for processing electrocardiogram signals derived from the electrocardiogram measuring means (1) and pulse wave signals derived from the pulse-wave measuring means (2). The CPU (30) detects the amplitudes of the pulse waves corresponding to the R waves of the cardiogram and the pulse wave propagation times, and computes a ratio (Nr/N) of the heart rate N and the heart rate Nr exclusive of the heart beats of wave deficits.Type: GrantFiled: August 10, 1998Date of Patent: October 10, 2000Assignee: Nihon Kohden CorporationInventors: Takeshi Sohma, Yoshihiro Sugo, Rie Tanaka, Wenxi Chen, Hiromitsu Kasuya, Kohei Ono
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Patent number: 6122543Abstract: A pacing-pulse detecting circuit 3 detects pacing pulses from an electrocardiogram signal led from an electrocardiogram electrode 1. A mode-status judging means 21 judges a mode status, a pacing mode or a nonpacing mode, on the basis of the pacing pulse detected. The detect result is transmitted to a CPU 5. The CPU 5 causes a display device 10 to display the result. An operator sees the display and operates a key 22, and gives an instruction to start a blood pressure measurement to the CPU 5. The CPU 5 drives a pump 13 and an exhaust valve 14 to supply and discharge air to and from a cuff 11, and measures a blood pressure by use of pressure data led from a pressure sensor 15.Type: GrantFiled: February 17, 2000Date of Patent: September 19, 2000Assignee: Nihon Kohden CorporationInventors: Ryoichi Ochiai, Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen
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Patent number: 6083171Abstract: A pulse wave propagation time is counted constantly. Not only it is judged whether or not a pulse wave propagation time change .DELTA.T exceeds a pulse wave propagation time change threshold .DELTA.Ts, but also it is judged whether or not cardiovascular dynamic changes .DELTA.HR, r.sub.1, r.sub.2 exceed thresholds thereof .DELTA.HRs, r.sub.1 s, r.sub.2 s, whereby a sudden turn for the worse in the blood pressure fluctuation of a subject is monitored. If any one of the changes exceeds the threshold thereof, a blood pressure measurement using a cuff 2 is made on the subject.Type: GrantFiled: November 1, 1996Date of Patent: July 4, 2000Assignee: Nihon Kohden CorporationInventors: Kohei Ono, Hiromitsu Kasuya, Yoshihiro Sugo, Takeshi Sohma, Hidehiro Hosaka
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Patent number: 6049731Abstract: A pacing-pulse detecting circuit 3 detects pacing pulses from an electrocardiogram signal led from an electrocardiogram electrode 1. A mode-status judging means 21 judges a mode status, a pacing mode or a nonpacing mode, on the basis of the pacing pulse detected. The detect result is transmitted to a CPU 5. The CPU causes a display device 10 to display the result. An operator sees the display and operates a key 22, and gives an instruction to start a blood pressure measurement to the CPU 5. The CPU 5 drives a pump 13 and an exhaust valve 14 to supply and discharge air to and from a cuff 11, and measures a blood pressure by use of pressure data led from a pressure sensor 15.Type: GrantFiled: August 20, 1998Date of Patent: April 11, 2000Assignee: Nihon Kohden CorporationInventors: Ryoichi Ochiai, Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen
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Patent number: 6011989Abstract: An electrocardiogram signal derived from electrocardiogram measuring means 1 and a pulse signal derived from pulse-wave measuring means 2 are applied to a CPU 30. The CPU 30 processes the cardiogram signal to detect a QRS wave signal, and processes the pulse signal to detect the amplitude of the pulse signal. The CPU 30 judges whether or not the QRS wave is caused by a ventricular premature contraction. If two QRS waves, not caused by ventricular premature contraction, occurs successively, and the CPU 30 judges if A0.times.k>A1. The CPU 30 judges that a supraventricular extrasystole is occurred. Here, A0 is an amplitude of the first QSR wave; A1 is an amplitude of the second QSR wave; and k is a preset value, 0<k<1.Type: GrantFiled: August 5, 1998Date of Patent: January 4, 2000Assignee: Nihon Kohden CorporationInventors: Yoshihiro Sugo, Takeshi Sohma, Rie Tanaka, Wenxi Chen, Shigeru Aso, Ryoichi Ochiai
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Patent number: 5876348Abstract: During a noninvasive blood pressure measurement using a cuff 2, a pulse wave propagation time T1 from the appearance of the peak value of an R wave in an electrocardiogram (ECG) waveform to the appearance of the bottom value of a pulse wave is counted, and a blood pressure value BP1 is calculated from a count result T1 and parameters .alpha., .beta. specific to a subject obtained during a pulse wave propagation time calibration. Then, the absolute value of a difference between the blood pressure value BP1 and a blood pressure value NIBP1 obtained by the noninvasive blood pressure measurement using the cuff 2 is calculated, and it is indeed whether or not the calculated absolute value is within a predetermined threshold.sub.-- BP. If the absolute value is judged to exceed the threshold.sub.-- BP, then blood pressure is measured again noninvasively using the cuff 2, and a blood pressure value NIBP1'obtained from such repeated measurement is displayed on a display 22.Type: GrantFiled: December 18, 1997Date of Patent: March 2, 1999Assignee: Nihon Kohden CorporationInventors: Yoshihiro Sugo, Takeshi Sohma, Hiromitsu Kasuya, Rie Tanaka
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Patent number: 5788634Abstract: The multi-purpose sensor includes a pair of arms, light-emitting device and light-receiving device that are fitted in an end portion of the arms, respectively, and electrodes that are made of an electrically conductive elastic material and which are bonded to end portion of the arms, respectively.Type: GrantFiled: June 9, 1997Date of Patent: August 4, 1998Assignee: Nihon Kohden CorporationInventors: Shin Suda, Yoshihiro Sugo
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Patent number: 5755669Abstract: After an initial blood pressure measurement using a cuff 2 has been made, not only a pulse wave propagation time Tt is counted consecutively, but also a pulse wave propagation time change .DELTA.T is calculated every time the pulse wave propagation time Tt is counted and compared with a pulse wave propagation change threshold .DELTA.Ts. When the pulse wave propagation time change .DELTA.T exceeds the pulse wave propagation time change threshold .DELTA.Ts, not only a blood pressure value BPt is measured with the cuff 2, but also a pulse wave propagation time Tt.sub.1 is counted. If there are at least two sets of data, each set of data consisting of a blood pressure value BPt and a pulse wave propagation time Tt.sub.1, coefficients .alpha., .beta. specific to a subject are calculated from such two sets of data by a least-squares method. Then, the pulse wave propagation time change threshold .DELTA.Ts is calculated from the coefficient .alpha., and the current pulse wave propagation time change threshold .DELTA.Type: GrantFiled: April 30, 1997Date of Patent: May 26, 1998Assignee: Nihon Kohden CorporationInventors: Kohei Ono, Hiromitsu Kasuya, Yoshihiro Sugo, Takeshi Sohma, Wenxi Chen
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Patent number: RE37852Abstract: A blood pressure monitoring system includes a blood pressure measurement device for measuring blood pressure using a cuff, a memory for storing an externally inputted pulse wave propagation time fluctuation threshold, a time interval detection reference point detection section for detecting a time interval detection reference point in a pulse wave on the side of aortae of a living organism, a pulse wave detection section for detecting a pulse wave on the side of peripheral blood vessels appearing with a time lag with respect to the pulse wave on the side of aortae, a pulse wave propagation time measurement section for measuring a pulse wave propagation time based on respective detected outputs from the time interval detection reference point detection section and the pulse wave detection section, an operation device for calculating a pulse wave propagation fluctuation from two measured pulse wave propagation times, a judgment device for judging whether or not the calculated pulse wave propagation time fluctuaType: GrantFiled: October 14, 1998Date of Patent: September 17, 2002Assignee: Nihon Kohden CorporationInventors: Shigeru Aso, Hiroshi Sakata, Yoshihiro Sugo, Hidehiro Hosaka