Hiroshima University

Nihon Kohden Corporation

Delta Tooling Co., Ltd.

Masao Yoshizumi

Teiji Ukawa

Toshio Tsuji

Masashi Kawamoto

Yukihito Higashi

Tsuneo Takayanagi

Hideo Ozawa

Etsunori Fujita

Yumi Ogura

Shinichiro Maeda

Haruka Morimoto

Yoshika Nobuhiro

Noboru Saeki

Ryuji Nakamura

Shigehiko Kaneko

Ryosuke Kubo

Abdugheni Kutluk

Akinobu Kohno

Tetsuya Horiuchi

Kanako Takaichi

Kanako Nakashima

Masahiro Horikawa

Blood pressure is estimated in a non-constraining manner continuously and in real time. A biological signal collected from a person's dorsal part is analyzed, vibration in the human body ascribable to a blood flow rate change in a period from the ventricular filling period to the isovolumetric systole is captured, and the state of fluctuation of an index indicating the state of the in vivo vibration is further captured. This fluctuation index correlates with a person's blood pressure. Therefore, it is possible to estimate whether the blood pressure is in a range indicating a normal-range blood pressure or in a range indicating a high blood pressure, only by having the person sit or lie supine on a surface provided with a biological signal measurement device to measure a biological signal in a non-constraining manner, so as to make the biological signal measurement device contiguous with the person's dorsal part.

Blood pressure estimation device, blood pressure estimation method, computer program, and storage medium

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.

Apparatus for evaluating vascular endothelial function

An apparatus for evaluating a vascular endothelial function using a first cuff that occludes an artery of a patient, measuring pulse waves from pressure of a second cuff at a different position than the first cuff, and evaluating the vascular endothelial function using the pulse waves.

An apparatus for evaluating a vascular endothelial function includes: a cuff, to be wound around a part of a body of a subject; a cuff pressure controller, configured to control a pressure of the cuff, and configured to apply continuous pressure stimulation; a cuff pressure detector, configured to detect the pressure of the cuff from output of a pressure sensor connected to the cuff; a pulse wave detector, configured to detect, from the output of the pressure sensor, pulse waves before and after the continuous pressure stimulation is applied; and an analyzer, configured to evaluate the vascular endothelial function by comparing the pulse waves detected before and after the continuous pressure stimulation is applied.

Apparatus and method of evaluating vascular endothelial function

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

Masao Yoshizumi