Patents by Inventor Kunihiko Akita
Kunihiko Akita 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: 20190255239Abstract: To provide a blood-purification-treatment support system capable of making an accurate judgement of whether or not any treatment conditions for blood purification treatment should be changed. The blood-purification-treatment support system is capable of supporting blood purification treatment. The system includes a storage device that stores patient-specific patient data that are acquired on a plurality of days including at least no-treatment days on which blood purification treatment is not conducted, an estimating device that compares the patient data for the plurality of days stored in the storage device with one another and estimates a pre-treatment patient state regarding blood purification treatment, and a judging device that judges from the pre-treatment patient state estimated by the estimating device whether or not any treatment conditions for blood purification treatment should be changed.Type: ApplicationFiled: April 30, 2019Publication date: August 22, 2019Inventors: Hitoshi Goto, Kunihiko Akita, Masahiro Toyoda
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Patent number: 10046104Abstract: A peristaltic pump includes a mounting concave section 8a on which a peristaltically-actuated tube connected to an arterial blood circuit is mountable; a roller which compresses the peristaltically-actuated tube mounted on the mounting concave section in a radial direction and causes the peristaltically-actuated tube to be peristaltically actuated in a longitudinal direction such that a liquid therein is flowable in the arterial blood circuit; a load sensor that is able to detect displacement of the peristaltically-actuated tube 1a mounted on the mounting concave section in the radial direction; and blockage detecting means that is able to detect a blockage of the arterial blood circuit based on the displacement detected by the load sensor.Type: GrantFiled: April 16, 2015Date of Patent: August 14, 2018Assignee: NIKKISO COMPANY LIMITEDInventors: Sumiaki Matsuo, Kunihiko Akita
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Publication number: 20180133384Abstract: A blood purification apparatus in which the error in the amount of discharge from a blood pump that is caused by the change in the suction pressure of the blood pump is reduced. A blood purification apparatus includes a blood circuit through which blood of a patient is extracorporeally circulated; a dialyzer connected to proximal ends of an arterial blood circuit and a venous blood circuit and that purifies the blood extracorporeally circulating through the blood circuit; a squeezable tube connected to the arterial blood circuit; a blood pump allowing liquid in the squeezable tube to flow by squeezing the squeezable tube in a lengthwise direction while compressing the squeezable tube in a radial direction; and a pressure-detecting device attached to a predetermined position of the arterial blood circuit that is nearer to a distal end than a position where the blood pump is provided, the pressure-detecting device being capable of detecting a suction pressure of the blood pump.Type: ApplicationFiled: December 21, 2017Publication date: May 17, 2018Inventors: Makoto Tokunaga, Kunihiko Akita
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Patent number: 9951766Abstract: A pressure detection device of a liquid flow route includes; displacement detecting means that detects displacement of a peristaltically-actuated tube in the radial direction; pressure calculating means that is able to calculate blood removal pressure based on the displacement of the peristaltically-actuated tube; closed flow route forming means that is able to form a closed flow route which includes a portion at which the displacement detecting means is disposed; pressure changing means that is able to arbitrarily change the pressure in the closed flow route; pressure detection means that is able to detect pressure change in the closed flow route; and calibration curve acquiring means that is able to produce and acquire a calibration curve with which the displacement detecting means and the pressure calculating means are calibrated by a relationship between the pressure change detected by the pressure detection means and a detection value of the displacement detecting means.Type: GrantFiled: April 16, 2015Date of Patent: April 24, 2018Assignee: NIKKISO COMPANY LIMITEDInventors: Kunihiko Akita, Sumiaki Matsuo
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Publication number: 20180071449Abstract: A blood purification apparatus includes a blood circuit through which blood of a patient extracorporeally circulate, and a dialyzer that purifies the blood flowing in the blood circuit.Type: ApplicationFiled: November 21, 2017Publication date: March 15, 2018Inventors: Shinya Hasegawa, Kunihiko Akita, Masahiro Toyoda
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Patent number: 9662433Abstract: A pressure detection device of a liquid flow route is provided which detects a pressure of an arterial blood circuit consisting of a flexible tube, a portion of which is connected to a peristaltically-actuated tube that can cause an internal liquid to flow by being compressed in a radial direction and being peristaltically actuated in a longitudinal direction in a roller of a blood pump, and which enables a predetermined liquid to be circulated. The pressure detection device includes a load sensor that detects radial displacement of the peristaltically-actuated tube.Type: GrantFiled: February 21, 2014Date of Patent: May 30, 2017Assignee: NIKKISO COMPANY LIMITEDInventors: Sumiaki Matsuo, Kazumi Yokoyama, Kunihiko Akita
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Publication number: 20160175508Abstract: Provided is a blood purification apparatus which can continue to accurately monitor a blood purification treatment state even if treatment conditions are changed during blood purification treatment. The blood purification apparatus can perform real-time monitoring on the blood purification treatment state, based on a concentration change in a discharge solution which is obtained by an arithmetic device. The blood purification apparatus includes a treatment condition change device that sets or changes treatment conditions as requested, and that causes a discharge solution concentration sensor to previously detect concentration of the discharge solution under the respective treatment conditions, and a storage device that stores the concentration of the discharge solution under the respective treatment conditions which is detected by the discharge solution concentration sensor in the treatment condition change device, as a first predetermined value corresponding to the respective treatment conditions.Type: ApplicationFiled: February 26, 2016Publication date: June 23, 2016Inventors: Tomoya Murakami, Kunihiko Akita, Masahiro Toyoda
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Patent number: 9212988Abstract: A blood purification apparatus includes a blood purification instrument for extracorporeally circulating blood of a patient and a concentration detector detecting a concentration of liquid flowing during blood purification. The concentration detector has a light emitter irradiating light onto said liquid, a light receiver receiving light from the light emitter transmitted through said liquid, and a detector detecting the received light intensity received by the light receiver. The concentration detector detects the concentration of the liquid based on the received light intensity and can be calibrated by adjusting an amount of irradiation by the light emitter so that the received light intensity has a predetermined value.Type: GrantFiled: December 14, 2010Date of Patent: December 15, 2015Assignee: NIKKISO CO., LTD.Inventors: Kunihiko Akita, Tomoya Murakami, Takayuki Hirano, Yasushi Takakuwa
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Publication number: 20150238677Abstract: A pressure detection device of a liquid flow route includes; displacement detecting means that detects displacement of a peristaltically-actuated tube in the radial direction; pressure calculating means that is able to calculate blood removal pressure based on the displacement of the peristaltically-actuated tube; closed flow route forming means that is able to form a closed flow route which includes a portion at which the displacement detecting means is disposed; pressure changing means that is able to arbitrarily change the pressure in the closed flow route; pressure detection means that is able to detect pressure change in the closed flow route; and calibration curve acquiring means that is able to produce and acquire a calibration curve with which the displacement detecting means and the pressure calculating means are calibrated by a relationship between the pressure change detected by the pressure detection means and a detection value of the displacement detecting means.Type: ApplicationFiled: April 16, 2015Publication date: August 27, 2015Inventors: Kunihiko Akita, Sumiaki Matsuo
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Publication number: 20150217040Abstract: A peristaltic pump includes a mounting concave section 8a on which a peristaltically-actuated tube connected to an arterial blood circuit is mountable; a roller which compresses the peristaltically-actuated tube mounted on the mounting concave section in a radial direction and causes the peristaltically-actuated tube to be peristaltically actuated in a longitudinal direction such that a liquid therein is flowable in the arterial blood circuit; a load sensor that is able to detect displacement of the peristaltically-actuated tube 1a mounted on the mounting concave section in the radial direction; and blockage detecting means that is able to detect a blockage of the arterial blood circuit based on the displacement detected by the load sensor.Type: ApplicationFiled: April 16, 2015Publication date: August 6, 2015Inventors: Sumiaki Matsuo, Kunihiko Akita
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Publication number: 20140219829Abstract: A pressure detection device of a liquid flow route is provided which detects a pressure of an arterial blood circuit consisting of a flexible tube, a portion of which is connected to a peristaitically-actuated tube that can cause an internal liquid to flow by being compressed in a radial direction and being peristaltically actuated in a longitudinal direction in a roller of a blood pump, and which enables a predetermined liquid to be circulated. The pressure detection device includes a load sensor that detects radial displacement of the peristaltically-actuated tube.Type: ApplicationFiled: February 21, 2014Publication date: August 7, 2014Applicant: Nikkiso Company LimitedInventors: Sumiaki Matsuo, Kazumi Yokoyama, Kunihiko Akita
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Patent number: 8518247Abstract: A blood purification instrument for extracorporeally circulating a patient's blood and a concentration detector detects a concentration of liquid during blood purification wherein the concentration detector has a light emitter irradiating light onto the liquid, a light receiver receives the light as transmitted through the liquid, a reference light receiver receives reference light branched from the light emitter without transmission through the liquid, and a detector detecting the light intensity respectively of the transmitted light and the reference light received by the light receiver and the reference light receiver, respectively.Type: GrantFiled: December 14, 2010Date of Patent: August 27, 2013Assignee: Nikkiso Co., Ltd.Inventors: Kunihiko Akita, Tomoya Murakami, Takayuki Hirano, Yasushi Takakuwa
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Publication number: 20110139690Abstract: A blood purification instrument for extracorporeally circulating a patient's blood and a concentration detector detects a concentration of liquid during blood purification wherein the concentration detector has a light emitter irradiating light onto the liquid, a light receiver receives the light as transmitted through the liquid, a reference light receiver receives reference light branched from the light emitter without transmission through the liquid, and a detector detecting the light intensity respectively of the transmitted light and the reference light received by the light receiver and the reference light receiver, respectively.Type: ApplicationFiled: December 14, 2010Publication date: June 16, 2011Applicant: NIKKISO CO., LTD.Inventors: Kunihiko Akita, Tomoya Murakami, Takayuki Hirano, Yasushi Takakuwa
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Publication number: 20110144459Abstract: A blood purification apparatus includes a blood purification instrument for extracorporeally circulating blood of a patient and a concentration detector detecting a concentration of liquid flowing during blood purification. The concentration detector has a light emitter irradiating light onto said liquid, a light receiver receiving light from the light emitter transmitted through said liquid, and a detector detecting the received light intensity received by the light receiver. The concentration detector detects the concentration of the liquid based on the received light intensity and can be calibrated by adjusting an amount of irradiation by the light emitter so that the received light intensity has a predetermined value.Type: ApplicationFiled: December 14, 2010Publication date: June 16, 2011Applicant: NIKKISO CO., LTD.Inventors: Kunihiko Akita, Tomoya Murakami, Takayuki Hirano, Yasushi Takakuwa
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Patent number: 5502712Abstract: In a routing system used in each of exchange stations of a data communication network and including trunk terminator groups physically terminating transit trunks to receive incoming signals and send outgoing signals and route selectors for selecting an alternative route, a switch switches the incoming signals into switch output signals and, into the outgoing signals, switch input signals transmitted through the route selectors. Frame relay communication controllers process, into processed signals, the switch output signals conveyed through the route selectors and controlled signals into the switch input signals. A frame relay procedure processor processes the processed signals into relay output signals and relay input signals into the controlled signals and locate a faulty trunk transmitting a fault for superposition on the relay output signals during presence of the fault, to control the switch and to put the route selectors into operation.Type: GrantFiled: October 27, 1994Date of Patent: March 26, 1996Assignee: NEC CorporationInventor: Kunihiko Akita