Nihon Kohden Corporation

Hiroshima University

Haruka Morimoto

Teiji Ukawa

Tsuneo Takayanagi

Tatsuo Yoshida

Mitsushi Hyogo

Tatsuo Nishihara

Shiro Adachi

Noboru Saeki

Ryuji Nakamura

Naoki Kobayashi

Hideo Ozawa

Jun Motogi

Masashi Kawamoto

Toshio Tsuji

Masao Yoshizumi

Yukihito Higashi

Ryosuke Kubo

A venous pressure measurement apparatus includes: a pressure controller that causes an internal pressure of a cuff to be attached to a subject, to change; a pressure detector that detects the internal pressure of the cuff; and a processor that causes the pressure controller to change the internal pressure of the cuff, acquires a statistical value relating to a distribution of amplitudes of a plurality of pressure changes corresponding to pressure vibration that occurs in the cuff, and that is detected by the pressure detector, and estimates a venous pressure of the subject based on a change of the statistical value due to the change of the internal pressure of the cuff.

Venous pressure measurement apparatus

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.

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

An apparatus and a method for measuring a respiration-induced blood pressure fluctuation are provided. A blood pressure calculating section calculates a pulse pressure of a subject. A pulse wave measuring section measures a pulse wave of the subject. A respiration-induced fluctuation calculating section calculates the respiration-induced blood pressure fluctuation of the subject as a pressure value, based on the pulse pressure and a fluctuation and an amplitude of the pulse wave in a given time period.

Measuring apparatus and measuring method

An apparatus for evaluating a vascular endothelial function, includes: a cuff pressure controlling unit configured to perform continuous pressure stimulation on a part of a body of a subject for a predetermined time, by using a cuff adapted to be wrapped around the part of the body of the subject; a cuff pressure detecting unit configured to detect a cuff pressure from an output of a pressure sensor connected to the cuff; a pulse wave detecting unit configured to detect a pulse wave from the output of the pressure sensor; and an analyzing unit configured to evaluate the vascular endothelial function by comparing vessel viscoelastic indexes which are obtained from the pulse wave detected in two of zones before, during, and after the pressure stimulation, and which exclude an amplitude of the pulse wave.

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Tokyo, Japan

Haruka Morimoto