Patents by Inventor Takashi Usuda
Takashi Usuda 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: 11426086Abstract: A pressurizing/depressurizing section (4) performs at least one of air feeding to a cuff (20) by way of an air way (3) and air discharging by way of the air way (3) to thereby increase or decrease an internal pressure of the cuff (20). A first controlling section (5) causes the pressurizing/depressurizing section (4) to initiate the air feeding while performing the air discharging to thereby cause the internal pressure to transit from a pressure transient state to a pressure steady state or from the pressure steady state to the pressure transient state. A determining section (6) determines Whether the internal pressure has transited to the pressure steady state by way of the pressure transient state. A second controlling section (7) causes the pressurizing/depressurizing section (4) to suppress or stop the air discharging while continuing the air feeding, in accordance with determination made by the determining section (6).Type: GrantFiled: July 20, 2016Date of Patent: August 30, 2022Assignee: NIHON KOHDEN CORPORATIONInventors: Ei Nomura, Takashi Usuda
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Patent number: 11058306Abstract: A pressurizing/depressurizing section (3) increases or decreases an internal pressure of a cuff (20). A first controlling section (4) controls an operation of the pressurizing/depressurizing section (3) so as to cause the internal pressure to transit from a pressure transient state to a pressure steady state and vice versa. A detecting section (5) detects the internal pressure. A storage section (6) stores control modes ways for increasing/decreasing the internal pressure of which are different. A determining section (7) determines a type of the cuff (20) in accordance with whether the detected internal pressure has reached the pressure steady state within a predetermined time period since start of the pressure transient state. A second controlling section (9) selects one of the control modes in accordance with the determined type of the cuff (20), and to control the operation of the pressurizing/depressurizing section (3) in accordance with the selected one of the control modes.Type: GrantFiled: July 7, 2016Date of Patent: July 13, 2021Assignee: Nihon Kohden CorporationInventors: Ei Nomura, Takashi Usuda
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Patent number: 11013422Abstract: A blood pressure measurement apparatus includes a pressure controller that controls an internal pressure of a cuff, an oscillation acquiring section that acquires an oscillation corresponding to a pressure vibration, a pulse wave signal acquiring section that acquires a pulse wave signal of the subject from a probe, a processor, and a memory that stores instructions executable by the processor. In the apparatus, when the instructions are executed by the processor, the apparatus causes the pressure controller to inflate the internal pressure, determines whether a first condition is satisfied or not, determines whether a second condition is satisfied or not, and if the first condition and the second condition are satisfied, determines a mean blood pressure of the subject based on the internal pressure.Type: GrantFiled: September 14, 2018Date of Patent: May 25, 2021Assignee: NIHON KOHDEN CORPORATIONInventors: Yoshinori Ueda, Kazumasa Ito, Takashi Usuda
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Patent number: 10349842Abstract: A blood pressure measuring apparatus, which measures a blood pressure of a living body, includes: a cuff-pressure control unit which controls a cuff pressure of a cuff that presses a part of the living body; an oscillation signal detection unit which detects an oscillation signal from the cuff pressure; a blood pressure specification unit which specifies systolic and diastolic blood pressures as the blood pressure of the living body from the oscillation signal; and a blood pressure determination unit which determines whether systolic and diastolic blood pressures are appropriate or not.Type: GrantFiled: August 17, 2011Date of Patent: July 16, 2019Assignee: Nihon Kohden CorporationInventors: Takashi Usuda, Yoshiharu Kikuchi, Hideaki Hirahara, Naoki Kobayashi, Katsuyoshi Suzuki
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Publication number: 20190090758Abstract: A blood pressure measurement apparatus includes a pressure controller that controls an internal pressure of a cuff, an oscillation acquiring section that acquires an oscillation corresponding to a pressure vibration, a pulse wave signal acquiring section that acquires a pulse wave signal of the subject from a probe, a processor, and a memory that stores instructions executable by the processor. In the apparatus, when the instructions are executed by the processor, the apparatus causes the pressure controller to inflate the internal pressure, determines whether a first condition is satisfied or not, determines whether a second condition is satisfied or not, and if the first condition and the second condition are satisfied, determines a mean blood pressure of the subject based on the internal pressure.Type: ApplicationFiled: September 14, 2018Publication date: March 28, 2019Inventors: Yoshinori UEDA, Kazumasa ITO, Takashi USUDA
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Patent number: 10165952Abstract: A biological information measuring apparatus and method are provided. A pulsation information detecting unit detects heartbeat information relating to a heartbeat of a subject. A pulse wave detecting unit detects a pulse wave while a portion of the subject is pressurized and depressurized by a cuff. An amplitude calculating unit detects a cardiac cycle of a heart from the heartbeat information and a maximal value of the pulse wave in each cardiac cycle, and calculates, based on the maximal value detected from the pulse wave, at least one of an amplitude value derived from the heartbeat of the subject, an amplitude value assisted by an IABP, and an amplitude value derived from a blood flow volume of the subject. A blood pressure calculating unit calculates a blood pressure value from a relationship between the amplitude values calculated by the amplitude calculating unit and a pressurizing force of the cuff.Type: GrantFiled: July 14, 2015Date of Patent: January 1, 2019Assignee: NIHON KOHDEN CORPORATIONInventors: Takashi Usuda, Hiroshi Kubo, Yukio Koyama
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Publication number: 20180220908Abstract: A pressurizing/depressurizing section (3) increases or decreases an internal pressure of a cuff (20). A first controlling section (4) controls an operation of the pressurizing/depressurizing section (3) so as to cause the internal pressure to transit from a pressure transient state to a pressure steady state and vice versa. A detecting section (5) detects the internal pressure. A storage section (6) stores control modes ways for increasing/decreasing the internal pressure of which are different. A determining section (7) determines a type of the cuff (20) in accordance with whether the detected internal pressure has reached the pressure steady state within a predetermined time period since start of the pressure transient state. A second controlling section (9) selects one of the control modes in accordance with the determined type of the cuff (20), and to control the operation of the pressurizing/depressurizing section (3) in accordance with the selected one of the control modes.Type: ApplicationFiled: July 7, 2016Publication date: August 9, 2018Applicant: Nihon Kohden CorporationInventors: Ei NOMURA, Takashi USUDA
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Publication number: 20180206745Abstract: A pressurizing/depressurizing section (4) performs at least one of air feeding to a cuff (20) by way of an air way (3) and air discharging by way of the air way (3) to thereby increase or decrease an internal pressure of the cuff (20). A first controlling section (5) causes the pressurizing/depressurizing section (4) to initiate the air feeding while performing the air discharging to thereby cause the internal pressure to transit from a pressure transient state to a pressure steady state or from the pressure steady state to the pressure transient state. A determining section (6) determines Whether the internal pressure has transited to the pressure steady state by way of the pressure transient state. A second controlling section (7) causes the pressurizing/depressurizing section (4) to suppress or stop the air discharging while continuing the air feeding, in accordance with determination made by the determining section (6).Type: ApplicationFiled: July 20, 2016Publication date: July 26, 2018Applicant: NIHON KOHDEN CORPORATIONInventors: Ei NOMURA, Takashi USUDA
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Publication number: 20180070835Abstract: A tube for a blood pressure cuff includes a hollow and long shape, and plural projection portions projecting toward a center of a regular polygon in correspondence with vertices of the regular polygon which inscribes in an outer circumference and has 5 or more angles, in a shape of an inner circumference in a cross section perpendicular to a longitudinal direction of the cuff tube.Type: ApplicationFiled: May 17, 2017Publication date: March 15, 2018Inventors: Teishi Oishi, Takashi USUDA
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Patent number: 9615774Abstract: A CO2 sensor includes: a sensing portion operable to change in color in accordance with a CO2 partial pressure in expiration from at least one of nares and a mouth of a living body; and a mounting member adapted to hold the sensing portion at a position where the expiration from the at least one of the nares and the mouth impinges on the sensing portion.Type: GrantFiled: June 19, 2012Date of Patent: April 11, 2017Assignee: NIHON KOHDEN CORPORATIONInventors: Naoki Kobayashi, Masayuki Inoue, Hidetoshi Dainobu, Toshiki Aoki, Kumi Sugiyama, Iwao Takahashi, Kazumasa Ito, Takashi Usuda
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Publication number: 20160029908Abstract: A biological information measuring apparatus and method are provided. A pulsation information detecting unit detects heartbeat information relating to a heartbeat of a subject. A pulse wave detecting unit detects a pulse wave while a portion of the subject is pressurized and depressurized by a cuff. An amplitude calculating unit detects a cardiac cycle of a heart from the heartbeat information and a maximal value of the pulse wave in each cardiac cycle, and calculates, based on the maximal value detected from the pulse wave, at least one of an amplitude value derived from the heartbeat of the subject, an amplitude value assisted by an IABP, and an amplitude value derived from a blood flow volume of the subject. A blood pressure calculating unit calculates a blood pressure value from a relationship between the amplitude values calculated by the amplitude calculating unit and a pressurizing force of the cuff.Type: ApplicationFiled: July 14, 2015Publication date: February 4, 2016Applicant: NIHON KOHDEN CORPORATIONInventors: Takashi USUDA, Hiroshi KUBO, Yukio KOYAMA
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Patent number: 9017368Abstract: A method of calculating a blood pressure, includes: providing a non-invasive blood pressure measurement apparatus which includes a cuff being inflatable and deflatable and adapted to be fitted on a part of a living body and in which a plurality of calculation methods each of which has priority in accordance with a type of noise information are set; detecting, by the cuff, a signal waveform representing a change in an oscillation amplitude and a change in a cuff pressure; determining the type of the noise information contained in the detected signal waveform; deciding the blood pressure from at least one candidate value for the blood pressure, which is calculated by one of the calculation methods that has the priority with respect to the determined type of the noise information; and displaying the decided blood pressure.Type: GrantFiled: October 31, 2008Date of Patent: April 28, 2015Assignee: Nihon Kohden CorporationInventors: Takashi Usuda, Sunao Takeda
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Publication number: 20120330161Abstract: A CO2 sensor includes: a sensing portion operable to change in color in accordance with a CO2 partial pressure in expiration from at least one of nares and a mouth of a living body; and a mounting member adapted to hold the sensing portion at a position where the expiration from the at least one of the nares and the mouth impinges on the sensing portion.Type: ApplicationFiled: June 19, 2012Publication date: December 27, 2012Applicant: NIHON KOHDEN CORPORATIONInventors: Naoki KOBAYASHI, Masayuki INOUE, Hidetoshi DAINOBU, Toshiki AOKI, Kumi SUGIYAMA, Iwao TAKAHASHI, Kazumasa ITO, Takashi USUDA
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Publication number: 20120046561Abstract: A blood pressure measuring apparatus, which measures a blood pressure of a living body, includes: a cuff-pressure control unit which controls a cuff pressure of a cuff that presses a part of the living body; an oscillation signal detection unit which detects an oscillation signal from the cuff pressure; a blood pressure specification unit which specifies systolic and diastolic blood pressures as the blood pressure of the living body from the oscillation signal; and a blood pressure determination unit which determines whether systolic and diastolic blood pressures are appropriate or not.Type: ApplicationFiled: August 17, 2011Publication date: February 23, 2012Applicant: NIHON KOHDEN CORPORATIONInventors: Takashi USUDA, Yoshiharu KIKUCHI, Hideaki HIRAHARA, Naoki KOBAYASHI, Katsuyoshi SUZUKI
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Publication number: 20090112104Abstract: A method of calculating a blood pressure, includes: providing a non-invasive blood pressure measurement apparatus which includes a cuff being inflatable and deflatable and adapted to be fitted on a part of a living body and in which a plurality of calculation methods each of which has priority in accordance with a type of noise information are set; detecting, by the cuff, a signal waveform representing a change in an oscillation amplitude and a change in a cuff pressure; determining the type of the noise information contained in the detected signal waveform; deciding the blood pressure from at least one candidate value for the blood pressure, which is calculated by one of the calculation methods that has the priority with respect to the determined type of the noise information; and displaying the decided blood pressure,Type: ApplicationFiled: October 31, 2008Publication date: April 30, 2009Applicant: Nihon Kohden CorporationInventors: Takashi Usuda, Sunao Takeda
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Patent number: 7257433Abstract: An apparatus for measuring a concentration of a light-absorbing substance in blood is disclosed. A light emitter emits light beams to irradiate a living tissue, each of the light beams being associated with one wavelength which is absorbed by the blood. A first instrument measures first intensities of the light beams, which are to be incident on the living tissue. A second instrument measures second intensities of the light beams, which are transmitted through the living tissue. A first calculator calculates an attenuation variation ratio, which is a ratio of attenuation variations of the respective light beams due to variation of a volume of the blood caused by pulsation, based on the second intensities of the light beams. A second calculator calculates the concentration based on the first intensities, the second intensities, and the attenuation variation ratio.Type: GrantFiled: February 2, 2004Date of Patent: August 14, 2007Assignee: Nihon Kohden CorporationInventors: Yoshiaki Takamura, Naoki Kobayashi, Sunao Takeda, Takashi Usuda
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Publication number: 20040176670Abstract: An apparatus for measuring a concentration of a light-absorbing substance in blood is disclosed. A light emitter emits light beams to irradiate a living tissue, each of the light beams being associated with one wavelength which is absorbed by the blood. A first instrument measures first intensities of the light beams, which are to be incident on the living tissue. A second instrument measures second intensities of the light beams, which are transmitted through the living tissue. A first calculator calculates an attenuation variation ratio, which is a ratio of attenuation variations of the respective light beams due to variation of a volume of the blood caused by pulsation, based on the second intensities of the light beams. A second calculator calculates the concentration based on the first intensities, the second intensities, and the attenuation variation ratio.Type: ApplicationFiled: February 2, 2004Publication date: September 9, 2004Applicant: NIHON KOHDEN CORPORATIONInventors: Yoshiaki Takamura, Naoki Kobayashi, Sunao Takeda, Takashi Usuda
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Patent number: 6622095Abstract: An apparatus for determining concentrations of hemoglobins includes a light source for emitting lights of at least three different wavelengths, a first wavelength in a near-infrared region, a second wavelength in a red region, and a third wavelength in a red orange region, light receiving device for receiving light emitted by the light source, transmitted through a living tissue or reflected by the living tissue, attenuation ratio processing device for processing attenuation ratios between the wavelengths in accordance with variations of received-light output signals in each of the wavelengths output from the light receiving device, the variations are caused by a pulsation of blood and concentration ratio processing device for processing concentration ratios of at least oxyhemoglobin and methemoglobin based on the output signals from the attenuation ratio processing device.Type: GrantFiled: February 15, 2002Date of Patent: September 16, 2003Assignee: Nihon Kohden CorporationInventors: Naoki Kobayashi, Takashi Usuda, Michio Kanemoto, Yoshiaki Takamura, Teiji Ukawa
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Publication number: 20020111748Abstract: An apparatus for determining concentrations of hemoglobins includes a light source for emitting lights of at least three different wavelengths, a first wavelength in a near-infrared region, a second wavelength in a red region, and a third wavelength in a red orange region, light receiving device for receiving light emitted by the light source, transmitted through a living tissue or reflected by the living tissue, attenuation ratio processing device for processing attenuation ratios between the wavelengths in accordance with variations of received-light output signals in each of the wavelengths output from the light receiving device, the variations are caused by a pulsation of blood and concentration ratio processing device for processing concentration ratios of at least oxyhemoglobin and methemoglobin based on the output signals from the attenuation ratio processing device.Type: ApplicationFiled: February 15, 2002Publication date: August 15, 2002Applicant: NIHON KOHDEN CORPORATIONInventors: Naoki Kobayashi, Takashi Usuda, Michio Kanemoto, Yoshiaki Takamura, Teiji Ukawa
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Patent number: 6415236Abstract: An apparatus for determining concentrations of hemoglobins additionally uses a light source 3 which emits light of a third wavelength in an orangy red wavelength region of 590 to 660 nm. The apparatus includes light receiving means 6 for receiving lights that are emitted by the light sources and transmitted through or reflected by a living tissue, attenuation ratio processing means 15 for processing attenuation ratios &PHgr; on the wavelengths based on variations of signals associated with the wavelengths output from the light receiving means, which variations are caused by a pulsation of blood, and concentration ratio processing means 16 for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from the attenuation ratio processing means. The apparatus thus constructed can properly measure carboxyhemoglobin COHb, and present its concentration display and an alarm display in a simple manner, which is clinically effective.Type: GrantFiled: November 30, 2000Date of Patent: July 2, 2002Assignee: Nihon Kohden CorporationInventors: Naoki Kobayashi, Michio Kanemoto, Takashi Usuda, Teiji Ukawa