Patents by Inventor Kazuya Hijii
Kazuya Hijii 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: 20040082938Abstract: A resectoscope apparatus includes a high-frequency generating device which generates high-frequency current, a hollow sheath which can be inserted in the celom, a scope which is arranged in the sheath and which can observe the celom, an active electrode which transmits the high-frequency current to the body organ, and a solution supply device which supplies a solution to the hollow sheath. At least one of the sheath and the scope has conductivity. The sheath or the scope having the conductivity is connected to high frequency generating device via a connecting member so as to collect return current.Type: ApplicationFiled: April 10, 2003Publication date: April 29, 2004Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Masahide Ohyama, Kazuya Hijii, Shinji Hatta, Kenji Harano, Takeaki Nakamura, Shuichi Kimura
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Publication number: 20040019351Abstract: A treatment electrode of a resectoscope apparatus is substantially semicircular-shaped. A length a of a first segment and a length b of a second segment satisfy a relationship of (a>2·b). The first segment is in parallel with the plane on which a parallel lead member exists and has the maximum width of the treatment electrode. The second segment is vertical to the first segment and has the maximum distance between an intersection to the first segment and an intersection to the treatment electrode.Type: ApplicationFiled: April 15, 2003Publication date: January 29, 2004Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Masahide Ohyama, Kazuya Hijii, Shinji Hatta, Kenji Harano, Takeaki Nakamura, Shuichi Kimura
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Publication number: 20030233089Abstract: In a resectscope apparatus of the present invention, by using an output from a second output transformer 131, high frequency current passes through a treating electrode 41 when the treating electrode 41 is in contact with a living tissue 152 in a conductive liquid 151. Then, the high frequency current flows between the treating electrode 41 and a return electrode 45. Thus, the treating electrode 41 generates heat. Bubbles 153 are formed from the conductive liquid 151 on the peripheral surface of the treating electrode 41 and cover the treating electrode 41. Interlelectrode resistance increases from a resistance R1 and becomes higher resistance to a substantially insulating state. Then, the voltage increases, and discharging occurs between the treating electrode 41 and the living tissue 152. By using the high frequency current from the discharging, the living tissue is treated.Type: ApplicationFiled: May 15, 2003Publication date: December 18, 2003Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Masahide Ohyama, Kenji Harano, Kazuya Hijii
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Publication number: 20030233088Abstract: According to a resectscope apparatus of the present invention, in order to control the output properly by discriminating electric characteristics of perfusion fluids, under control of the control circuit (101), a predetermined detection current is fed from the output transformer circuit (105) by using power, which does not produce an electrical breakdown even in the insulative liquid (161) or in the air. A predetermined lapse of time until the output is stabilized is waited. The sensor signal processing circuit (107) A/D converts and measures current values detected by the current sensors (106a) and (106b). Whether a treating electrode and a return electrode are in a conductive liquid, in an insulative liquid or in the air is determined. Then, the output control processing is performed.Type: ApplicationFiled: May 13, 2003Publication date: December 18, 2003Applicant: OLYMPUS OPTICAL CO.,LTD.Inventors: Masahide Ohyama, Kenji Harano, Kazuya Hijii
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Patent number: 6663623Abstract: The electric surgical operation apparatus of the present invention easily and securely shortens the rising time until incision and coagulation effects appear even if electrodes having different volumes or surface areas are used for the treatment tool. Cutting sharpness and safety are improved and the operation time is shortened. In the electric surgical operation apparatus, contact of a monopolar electrode of a monopolar treatment tool with organic tissue is detected by a voltage or current sensor. Based on a detection signal therefrom, a high-frequency output is supplied at a predetermined value from a high-frequency cautery power source device, and a high-frequency output is supplied at a higher initial setting value than the predetermined value during an initial period at a rising time. Setting of at least one of the initial period and the initial setting value can be changed.Type: GrantFiled: March 13, 2000Date of Patent: December 16, 2003Assignee: Olympus Optical Co., Ltd.Inventors: Masahide Oyama, Kenji Harano, Hiroyuki Takahashi, Kazuya Hijii
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Patent number: 6635057Abstract: An electric operation apparatus including: a high frequency current generating circuit for feeding a high frequency current to electrodes; a direct power supply circuit for supplying variable electric power to the high frequency current generating circuit; a therapeutic condition monitoring circuit for monitoring a therapeutic condition brought about by the high frequency current on the basis of the high frequency current outputted by the high frequency electric current generating circuit; and a supplied power setting circuit for supplying a setting signal for supplied electric power to the power supply circuit on the basis of the monitoring results obtained by the therapeutic condition monitoring circuit.Type: GrantFiled: December 1, 2000Date of Patent: October 21, 2003Assignee: Olympus Optical Co. Ltd.Inventors: Kenji Harano, Masahide Ohyama, Kazuya Hijii
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Publication number: 20020165530Abstract: An electrosurgical device for treating a body tissue with a high-frequency power includes an electrode for exposing the body tissue to the high-frequency power for treatment, and a high-frequency cautery power supply having a control circuit that outputs a high-frequency power generator for outputting the high-frequency power to the electrode.Type: ApplicationFiled: April 29, 2002Publication date: November 7, 2002Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Kenji Harano, Masahide Ohyama, Kazuya Hijii, Shinji Hatta
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Patent number: 6464696Abstract: An electric surgical operation apparatus comprises: an active electrode which performs medical treatment to an area to be treated by applying electric energy to the area; an electric power supplying unit which supplies electric power to the active electrode; a measuring unit which measures at least one of the electrical power output voltage value supplied to the active electrode from the electric power supplying unit, and the output current value thereof; a discerning unit for discerning whether or not the change in at least one of the voltage value and the current value measured by the measuring unit has attained a predetermined change amount; and a voltage control unit for controlling the electric power supplying unit so that the supplied electric power is a constant voltage, according to the discerning results discerned by the discerning unit.Type: GrantFiled: February 24, 2000Date of Patent: October 15, 2002Assignee: Olympus Optical Co., Ltd.Inventors: Masahide Oyama, Kenji Harano, Hiroyuki Takahashi, Kazuya Hijii
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Patent number: 6383183Abstract: A high frequency treatment apparatus of the present invention comprises a high frequency generation section for supplying high frequency power, a control section, which is connected to the high frequency generation section, and which controls output of the high frequency generation section, having a first control mode in which the maximal output value of high frequency power supplied from the high frequency generation section is confined to be equal to or less than a first predetermined value and a second control mode in which the maximal output value of high frequency power supplied from the high frequency generation section is confined to be equal to or less than a second predetermined value which is less than the first predetermined value, a treatment tool, which is connected to the high frequency generation section, and which performs a treatment of a diseased part by supplying high frequency power from the high frequency generation section controlled by the control section to the diseased part, and a conType: GrantFiled: April 7, 1999Date of Patent: May 7, 2002Assignee: Olympus Optical Co., Ltd.Inventors: Naomi Sekino, Yasuhiko Kikuchi, Kazuya Hijii, Masahide Ohyama, Kouji Yamauchi, Hiroyuki Takahashi, Takahiro Kogasaka, Akio Nakada, Takeaki Nakamura, Masatoshi Tonomura, Hideto Yoshimine, Hiroaki Matsumoto
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Publication number: 20020052598Abstract: When a user steps on a footswitch, high-frequency output power is delivered. A control circuit included in a diathermic power supply calculates the impedance ZSn that is offered by a living tissue immediately after delivery of high-frequency output power is started during the n-th delivery period. The control circuit also calculates the impedance ZEn that is offered thereby immediately before delivery of high-frequency output power is discontinued with elapse of predetermined time. The control circuit then discontinues delivery of high-frequency output power for the predetermined time, and calculates a difference &Dgr;Az between the impedances. When the difference meets a predetermined condition that implies coagulation or when the number of times of delivery reaches a predetermined value, the control circuit discontinues delivery of high-frequency output power.Type: ApplicationFiled: August 14, 2001Publication date: May 2, 2002Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Kenji Harano, Masahide Ohyama, Kazuya Hijii, Koji Yamauchi, Shinji Hatta
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Publication number: 20010039417Abstract: An electric operation apparatus including: a high frequency current generating circuit for feeding a high frequency current to electrodes; a direct power supply circuit for supplying variable electric power to the high frequency current generating circuit; a therapeutic condition monitoring circuit for monitoring a therapeutic condition brought about by the high frequency current on the basis of the high frequency current outputted by the high frequency electric current generating circuit; and a supplied power setting circuit for supplying a setting signal for supplied electric power to the power supply circuit on the basis of the monitoring results obtained by the therapeutic condition monitoring circuit.Type: ApplicationFiled: December 1, 2000Publication date: November 8, 2001Inventors: Kenji Harano, Masahide Ohyama, Kazuya Hijii
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Patent number: 5931836Abstract: In an electrosurgery apparatus for treating a living tissue, while the living tissue is being treated, a variation in state of energy supplied from a cautery power supply to a monopolar treatment device is detected on the basis of detection data obtained from a current sensor and a voltage sensor. Based on the detected variation, living body information on the living tissue to be treated is obtained.Type: GrantFiled: July 21, 1997Date of Patent: August 3, 1999Assignee: Olympus Optical Co., Ltd.Inventors: Shinji Hatta, Masakazu Gotanda, Tomohisa Sakurai, Yoshito Ichikawa, Kazuya Hijii, Masahide Oyama, Takashi Mihori, Hiroaki Matsumoto, Akihisa Ogawa, Kazue Tanaka
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Patent number: 5836897Abstract: An ultrasonic treatment apparatus comprises at least one hand piece, a plurality of probes, and an ultrasonic drive device. The hand piece has an ultrasonic oscillation device for generating ultrasonic vibration. Each probe is adapted to be attached to the hand piece and designed to transmit the ultrasonic vibration generated by the hand piece. The ultrasonic drive device is connected to the hand piece, for driving the ultrasonic oscillation device.Type: GrantFiled: August 14, 1997Date of Patent: November 17, 1998Assignee: Olympus Optical Co., Ltd.Inventors: Tomohisa Sakurai, Hideo Nagazumi, Kazuya Hijii, Toshihiko Suzuta, Masahiro Kudo, Kenji Yoshino, Tetsumaru Kubota, Tatsuya Kubota, Hiroaki Kagawa, Yuichi Ikeda, Mitsumasa Okada, Hitoshi Karasawa, Tadao Hagino
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Patent number: 5688235Abstract: An ultrasonic treatment apparatus comprises at least one hand piece, a plurality of probes, and an ultrasonic drive device. The hand piece has an ultrasonic oscillation device for generating ultrasonic vibration. Each probe is adapted to be attached to the hand piece and designed to transmit the ultrasonic vibration generated by the hand piece. The ultrasonic drive device is connected to the hand piece, for driving the ultrasonic oscillation device.Type: GrantFiled: August 27, 1996Date of Patent: November 18, 1997Assignee: Olympus Optical Co., Ltd.Inventors: Tomohisa Sakurai, Hideo Nagazumi, Kazuya Hijii, Toshihiko Suzuta, Masahiro Kudo, Kenji Yoshino, Tetsumaru Kubota, Tatsuya Kubota, Hiroaki Kagawa, Yuichi Ikeda, Mitsumasa Okada, Hitoshi Karasawa, Tadao Hagino
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Patent number: 5540683Abstract: A high-frequency cauterizing apparatus comprises a high-frequency power supply device, having a plurality of high-frequency output modes, for generating a high-frequency current, at least one medical treatment instrument to be connected to the high-frequency power supply device, a detector for detecting connection of the medical treatment instrument to the high-frequency power supply device, a control signal generator for identifying the type of the medical treatment instrument on the basis of a detection signal from the detector and generating a control signal, and a controller for controlling a high-frequency output from the high-frequency power supply device on the basis of the control signal generated from the control signal generator.Type: GrantFiled: July 12, 1994Date of Patent: July 30, 1996Assignee: Olympus Optical Co., Ltd.Inventors: Yoshito Ichikawa, Kazuya Hijii
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Patent number: 5391144Abstract: An ultrasonic treatment apparatus comprises at least one hand piece, a plurality of probes, and an ultrasonic drive device. The hand piece has an ultrasonic oscillation device for generating ultrasonic vibration. Each probe is adapted to be attached to the hand piece and designed to transmit the ultrasonic vibration generated by the hand piece. The ultrasonic drive device is connected to the hand piece, for driving the ultrasonic oscillation device.Type: GrantFiled: July 20, 1993Date of Patent: February 21, 1995Assignee: Olympus Optical Co., Ltd.Inventors: Tomohisa Sakurai, Hideo Nagazumi, Kazuya Hijii, Toshihiko Suzuta, Masahiro Kudo, Kenji Yoshino, Tetsumaru Kubota, Tatsuya Kubota, Hiroaki Kagawa, Yuichi Ikeda, Mitsumasa Okada, Hitoshi Karasawa, Tadao Hagino
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Patent number: 5255669Abstract: An ultrasonic treatment apparatus includes an ultrasonic probe having an ultrasonic vibration generator for generating ultrasonic vibrations and a vibration transmission member for transmitting generated vibrations, and a sheath for covering at least an outer peripheral surface of the vibration transmission member of the ultrasonic probe, and a fluid supply unit, attached to an attaching portion of the sheath, for supplying a fluid into a path defined between the vibration transmission member and the sheath. A seal member for sealing the path is arranged nearer to the vibration generator than the attaching portion of the sheath.Type: GrantFiled: December 19, 1991Date of Patent: October 26, 1993Assignee: Olympus Optical Co., Ltd.Inventors: Tatsuya Kubota, Kazuya Hijii, Tetsumaru Kubota, Yuichi Ikeda
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Patent number: 5211625Abstract: An ultrasonic treatment apparatus comprises a hand piece, and an RF power supply unit. The hand piece includes vibrator cover, a sheath connected thereto, a hollow cylindrical member, an ultrasonic vibrator in the cover for generating ultrasonic vibrations, a probe arranged in the sheath, for externally transmitting ultrasonic vibrations generated by the vibrator, and a cord for transmitting a high-frequency current from the RF power supply unit to the probe. The cover and sheath are composed of an insulating member, for preventing the high-frequency current transmitted by the probe from being externally leaked.Type: GrantFiled: March 15, 1991Date of Patent: May 18, 1993Assignee: Olympus Optical Co., Ltd.Inventors: Tomohisa Sakurai, Tetsumaru Kubota, Tatsuya Kubota, Hiroaki Kagawa, Yuichi Ikeda, Mitsumasa Okada, Hitoshi Karasawa, Hideo Nagazumi, Kazuya Hijii, Toshihiko Suzuta, Masahiro Kudo, Kenji Yoshino, Tadao Hagino
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Patent number: 5163433Abstract: An ultrasound type treatment apparatus includes an inner sheath covering an ultrasonic transmission member having a first suction passage and defining a space relative to the ultrasound transmission member and an outer sheath covering the inner sheath and defining a space relative to the inner sheath. In the treatment apparatus, a liquid medium supply passage is provided at one of the space between the ultrasound transmission member and the inner sheath and space between the inner sheet and the outer sheet to supply a liquid medium to the distal end of the ultrasound transmission member. A second suction passage is formed at the other of the space between the ultrasound transmission means and the inner sheath and space between the inner sheath and the outer sheath. The first suction passage is connected by a suction tube to the second suction passage.Type: GrantFiled: October 21, 1991Date of Patent: November 17, 1992Assignee: Olympus Optical Co., Ltd.Inventors: Hiroaki Kagawa, Tomohisa Sakurai, Tetsumaru Kubota, Hitoshi Karasawa, Tatsuya Kubota, Yuichi Ikeda, Mitsumasa Okada, Toshihiko Suzuta, Hideo Nagazumi, Kazuya Hijii, Masahiro Kudo, Kenji Yoshino, Tadao Hagino
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Patent number: 5076276Abstract: An ultrasound type treatment apparatus includes an ultrasonic oscillation device for outputting an ultrasonic oscillation wave, a drive circuit for driving the ultrasonic oscillation device, a probe connected to the ultrasonic oscillation device to transmit that ultrasonic oscillation wave to an affected region of interest of a human being, a sheath formed around the probe, through which cooling medium is passed and a supply tank for supplying cooling medium to the sheath. In this treatment apparatus, an arithmetic operation circuit monitors a drive state of the ultrasonic oscillation device, a comparator is provided for receiving monitor information from the arithmetic operation circuit and for determining whether or not the supply of cooling medium to the sheath is normal and a controller is provided for stopping a drive of the ultrasonic oscillation device when the supply of the cooling medium is determined by the comparator as being not normal.Type: GrantFiled: August 24, 1990Date of Patent: December 31, 1991Assignee: Olympus Optical Co., Ltd.Inventors: Tomohisa Sakurai, Tetsumaru Kubota, Hitoshi Karasawa, Tatsuya Kubota, Yuichi Ikeda, Mitsumasa Okada, Toshihiko Suzuta, Hideo Nagazumi, Kazuya Hijii, Masahiro Kudo, Hiroaki Kagawa, Kenji Yoshino, Tadao Hagino