Nihon Kohden Corporation

Hiroshima University

Ryuji Nakamura

Teiji Ukawa

Masashi Kawamoto

Noboru Saeki

Tsuneo Takayanagi

Haruka Morimoto

Toshio Tsuji

Masao Yoshizumi

Yukihito Higashi

Abdugheni Kutluk

Akinobu Kohno

Tetsuya Horiuchi

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 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 vessel wall monitoring apparatus includes: a first detecting unit which detects vessel diameter information based on first biological information obtained from a subject; a first producing unit which differentiates the vessel diameter information detected by the first detecting unit, to produce a vessel diameter function; a second detecting unit which detects blood pressure based on second biological information obtained from the subject; a second producing unit which performs a logarithmic operation on the blood pressure detected by the second detecting unit, to produce a logarithmic blood pressure function; and an outputting unit which produces an impedance model expression by using the vessel diameter function, the logarithmic blood pressure function, and mechanical characteristic values including a stiffness, viscosity, and inertia, and which calculates and outputs at least one of the stiffness, the viscosity, and the inertia based on the impedance model expression.

Vessel wall monitoring apparatus

Growing community of inventors

Hiroshima, Japan

Ryuji Nakamura