Nihon Kohden Corporation

Hiroshima University

National Cerebral and Cardiovascular Center

Teiji Ukawa

Kazumasa Ito

Yoshinori Ueda

Hideki Fujisaki

Haruka Morimoto

Tsuneo Takayanagi

Tatsuo Yoshida

Masashi Kawamoto

Naoki Kobayashi

Mitsushi Hyogo

Hideo Ozawa

Toshio Tsuji

Masao Yoshizumi

Yukihito Higashi

Michio Kanemoto

Tatsuo Nishihara

Hiroko Hagiwara

Noboru Saeki

Shiro Adachi

Ryuji Nakamura

Toru Maeda

Masahiro Takeuchi

Takuo Aoyagi

Masami Tanishima

Hidetoshi Dainobu

Masayoshi Fuse

Takashi Usuda

Toshiki Aoki

Masahiro Echigo

Yoshihiro Sugo

Sunao Takeda

Noriaki Todokoro

Tadashi Nakayama

Kazuya Nagase

Takaharu Suzuki

Hirohiko Ikeya

Rie Muneshima

Keiichi Sugiura

Jiro Suto

Kumi Sugiyama

Yoshinobu Nakae

Yoshiaki Takamura

Masafumi Kitakaze

Ryosuke Kubo

Abdugheni Kutluk

Akinobu Kohno

Tetsuya Horiuchi

Haruka Sato

Nobuko Kawasaki

Junya Kawano

Osamu Seguchi

Ryoko Kamiya

A medical photometer includes a signal producing section that produces a first control signal to emit a first light having a first wavelength, a second control signal to emit a second light having a second wavelength, a third control signal to emit a third light having a third wavelength, and a fourth control signal to emit a fourth light having a fourth wavelength, a signal acquiring section that acquires a first to fourth intensity signals, a processor, and a memory that stores instructions. In the medical photometer, the first wavelength and the second wavelength are selected as two wavelengths at each of which an extinction coefficient of blood is a first value. The third wavelength and the fourth wavelength are selected as two wavelengths at each of which the extinction coefficient of the blood is a second value which is different from the first value.

Medical photometer and medical photometry system

A circulatory dynamic measuring apparatus includes: an electrocardiogram acquiring section which is configured to acquire an electrocardiogram of a subject; a pulse wave acquiring section which is configured to acquire a poise wave of an upper arm of the subject; and a calculator which is configured to calculate information that relates to a cardiac function of the subject, and that is based on a pulse wave transmit time obtained from the electrocardiogram and the pulse wave.

Circulatory dynamic measuring apparatus and circulatory dynamic measuring method

A blood pressure measuring apparatus includes a pressure control unit that controls an applied pressure applied to a region of a living body in which a vein and artery exist by a cuff mountable to the region, a detection unit that detects pressure waveforms in which pulse wave components from the region overlap with the applied pressure, and an analysis unit that obtains a respiratory variation on the waveform of artery and a venous pressure based on the pressure waveforms detected by the detection unit through one-time blood pressure measurement. The analysis unit obtains the respiratory variation on the waveform of artery based on data of a first pressure waveform in a first process, and the venous pressure based on data of a second pressure waveform in a second process and the data of the first pressure waveform.

Blood pressure measuring apparatus and blood pressure measuring method

A non-invasive venous pressure measurement apparatus is provided, including: a first cuff attached to a portion including a vein and an artery in a living body; a pressure control unit that changes a first applied pressure applied by the cuff to the portion; a pulse wave detection unit that detects a pulse wave from a pressure received by the cuff from the portion; another pulse wave detection unit that detects another pulse wave including at least an arterial pulse wave in another portion of the living body; an analyzing unit that analyzes a correlation between the two pulse waves, which are changed as the applied pressure is changed by the pressure control unit changes; and a venous pressure calculation unit that calculates a venous pressure based on the applied pressure and a result of analysis by the analyzing unit.

Venous pressure measurement apparatus

An index output device for appropriately evaluating the conditions of the patient under anesthesia. An index output deviceincludes an electric stimulation section, an acquisition section, a calculation section, and an output section. The electric stimulation sectionis configured to apply an electric stimulus to a living body. The acquisition sectionis configured to acquire a plurality of physiological responses from the living body in response to the common electric stimulus applied to the living body by the electric stimulation section. The calculation section is configured to calculate, from the plurality of responses of the living body acquired by the acquisition section, an index related to a level of muscular relaxation (TOF) and an index related to a level of analgesia (PIR). The output section is configured to output the indexes calculated by the calculation section.

Index output device, index output method, and index output program

A venous pressure measurement apparatus includes a pressure controller configured to change a pressure applied from a cuff to a portion of a body where a vein and an artery exist and to which the cuff is attached, a pulse wave detector configured to detect pulse waves from a pressure the cuff receives from the portion of the body, and a venous pressure calculating section configured to calculate a venous pressure based on the applied pressure and the pulse waves detected by the pulse wave detector during a period in which the applied pressure is changed. The pressure controller is configured to execute a plurality of measurement steps, the applied pressure being increased or reduced from an initial value in each of the measurement steps.

Apparatus and method for measuring venous pressure

A pulse wave analyzing apparatus comprises an acquiring section () which acquires a pulse wave that is non-invasively measured, and an analyzer () which calculates data on the frequency axis by using the pulse wave, and which obtains the index value of the respiratory-induced variation based on the calculated data on the frequency axis.

Pulse wave analyzing apparatus

A medical photometer includes a processor and a memory that stores an instruction readable by a computer. When the instruction is executed by the processor, the medical photometer acquires an intensity of one of a first intensity signal and a second intensity signal, the first intensity signal corresponding to an intensity of a first light beam that has a first wavelength and that is transmitted through or reflected from a tissue of a living body, and a second intensity signal corresponding to an intensity of a second light beam that has a second wavelength and that is transmitted through or reflected from the tissue of the living body acquires an intensity ratio of the first intensity signal and the second intensity signal, and detects an artifact of the living body based on the acquired intensity and the acquired intensity ratio.

Medical photometer and medical photometer control method

A medical photometer includes a processor and a memory that stores an instruction readable by a computer. When the instruction is executed by the processor, the medical photometer acquires a first light attenuation of a first light beam that is transmitted through or reflected from a tissue of a living body, and that has a first wavelength, based on a first intensity signal corresponding to an intensity of the first light beam, acquires a second light attenuation of a second light beam that is transmitted through or reflected from the tissue, and that has a second wavelength, based on a second intensity signal corresponding to an intensity of the second light beam, calculates a tissue thickness based on a ratio of the first light attenuation and the second light attenuation, and detects an artifact of the living body based on a temporal variation of the tissue thickness.

A pulse photometer includes a light emitter, a light detector, a first signal separator that separates a first signal component and a first noise component, a second signal separator that separates a second signal component and a second noise component, a first determining section, a second determining section, and a concentration calculating section that calculates a concentration of a light absorption material in blood of the subject based on a fundamental frequency of the first signal component or a fundamental frequency of the second signal component.

Pulse photometer

A pulse photometer includes: a first variation acquirer acquiring a first variation corresponding to a light attenuation variation of a first light beam due to pulsation of blood in a subject based on a first intensity signal corresponding to an intensity of the first light beam transmitted through or reflected from a body of the subject and having a first wavelength; a second variation acquirer acquiring a second variation; a third variation acquirer acquiring a third variation; a concentration calculator calculating a blood light absorber concentration based on the first variation and the second variation; an estimated value calculator calculating an estimated value of the third variation based on the first variation and the second variation; and an evaluator evaluating reliability of a calculated value of the blood light absorber concentration based on the third variation and the estimated value.

Pulse photometer and method for evaluating reliability of calculated value of blood light absorber concentration

A pulse photometer includes: a first variation acquirer acquiring a first variation corresponding to a light attenuation variation of a first light beam due to pulsation of blood in a subject, based on a first intensity signal corresponding to an intensity of the first light beam that is transmitted through or reflected from a body of the subject, and that has a first wavelength; a second variation acquirer acquiring a second variation; and a concentration calculator calculating a blood light absorber concentration, based on the first and second variations, the second variation containing a first offset which is based on an inverse of the light attenuation variation of the first light beam.

Pulse photometer and method for calculating concentration of light absorber in blood

A probe which is to be attached to a finger of a subject to acquire physiological parameter of the subject includes a light emitter that emits a light beam toward the finger, a light detector that outputs a signal corresponding to a light beam that is transmitted through or reflected from the finger, a first holding face that has a portion which is faced with a nail of the finger and another portion which is faced with a side face of the finger, and a second holding face that has a portion which is faced with a pad of the finger and another portion which is faced with the side face of the finger. In a state where the probe is attached to the finger, the first holding face and the second holding face are placed to be continuous to each other.

Probe

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Tokyo, Japan

Teiji Ukawa