National Institute of Advanced Industrial Science and Technology

Hitachi Medical Corporation

Unex Corporation

Other

Terumo Kabushiki Kaisha

National Cerebral and Cardiovascular Center

Tsuyoshi Shiina

Naotaka Nitta

Hiroshi Masuda

Makoto Yamakawa

Hiroyuki Yagami

Tsutomu Furuzono

Takashi Yamane

Masahiro Okada

Miwa Masuda

A blood vessel function inspecting apparatus including a first blood state index value calculating portion that obtains estimated hematocrit values at a plurality of points predetermined within a blood vessel, on the basis of values of a blood viscosity and values of a shear rate at said plurality of points, which are respectively extracted from a viscosity distribution and a shear rate distribution, and according to reference relationships between a hematocrit value and the blood viscosity, which reference relationships respectively correspond predetermined different values of the shear rate; and a second blood state index value calculating portion that calculates, as said blood state index value, a value relating to an amount of difference of the estimated hematocrit values at said plurality of points with respect to each other, which amount is minimized by transforming said reference relationships at the same ratio for all of the values of the shear rate.

Blood vessel function inspecting apparatus

The present invention solves the issue of bacterial infection by medical devices such as intracorporeal indwelling catheters. The present invention relates to an ultrasonic medical apparatus including a medical device (titanium oxide coated medical device) covered with a titanium oxide material (titanium oxide alone or a titanium oxide composite material) and ultrasonic irradiation means. Ultrasonic irradiation of the titanium oxide material, which exists on a surface of the medical device, causes the surface of the medical device to exert beneficial effects such as antibiotic action, the stimulation of angiogenesis, and the degradation of a blood clot and a biofilm.

Extracorperal ultrasonic irradition of titanium oxide (TiO2) coated implant for angiogenesis stimulation

A blood vessel function inspecting apparatus including blood flow velocity distribution measuring portion for measuring a blood flow velocity distribution within a blood vessel in a non-invasion manner with ultrasonic waves before releasing of the blood vessel from a blood flow obstruction or after a blood vessel diameter measuring time period; viscosity-shear rate relationship calculating portion; and blood shear stress calculating portion for measuring a blood flow velocity within the blood vessel, concurrently with the measurement of a change ratio of the diameter of the blood vessel within the predetermined blood vessel diameter measuring time period after releasing of the blood vessel from the blood flow obstruction, and calculating a blood shear stress on the basis of a measured blood flow velocity, and according to a viscosity-shear rate relationship.

An ultrasonic diagnosis system and strain distribution display method utilizing an ultrasonic probe for performing transmission/reception of ultrasonic signals to/from a subject, a storage arrangement for storing the properties of signals detected with the ultrasonic probe, a correlation computer for calculating a correlation coefficient between the properties with and without pressure applied to the subject, and a phase difference between the received signals with and without application of pressure, based upon the properties stored in the storage arrangement with and without pressure applied to the subject, a computer for calculating a displacement of each measurement point, and a strain distribution of tissue of the subject due to application of pressure, based upon the correlation coefficient and phase difference calculated by the correlation computer, and a display for displaying the strain distribution.

Ultrasonic diagnosis system and distortion distribution display method

Ultrasonic diagnosis system and strain distribution display method

An ultrasonic diagnostic system according to the present invention has an ultrasonic transducer mounted on a catheter, an instantaneous distortion value calculator which calculates an instantaneous distortion value at the location to be evaluated in the blood vessel based on received signal representative of received reflection by the ultrasonic transducer, an analyzer which analyzes a state of the location to be evaluated using time-series data of instantaneous distortion values which are calculated at a plurality of times in a chronological sequence by the distortion value calculator, and a display which displays an analyzed result produced by the analyzer.

Ultrasonic diagnostic apparatus and method

Growing community of inventors

Tsukuba, Japan

Naotaka Nitta