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Circulatory function measurement device

A technology for measuring device and function, which can be used in catheters, vascular assessment, cardiac catheterization, etc., and can solve problems such as inability to accurately detect circulatory function.

Inactive Publication Date: 2012-07-25
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the circulatory function measuring device cannot accurately detect circulatory function

Method used

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Examples

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no. 1 example

[0031] A vascular sclerosis measuring device according to a first embodiment of the present invention will be described below with reference to the accompanying drawings.

[0032] Such as figure 1 As shown, the vascular sclerosis measuring device 10 includes a wristband 11, tubes 11a and 11b, a compression pressure control unit 12, a compression pressure detection unit 13, a pulse wave detection unit 14, a pulse wave cumulative value calculation unit 15, a storage unit 16 and a blood vessel Hardness measuring unit 17. The wristband 11 serves as a compression unit. The vascular sclerosis measurement unit 17 is used as a circulatory function measurement unit. The wristband 11 is made of rubber and has a bag shape. The wristband 11 is set around the upper arm of the subject (a part of the subject's body). The wristband 11 compresses the subject's upper arm (upper arm artery) according to the pressure (compression pressure) of the wristband. The wristband 11 is connected to t...

no. 2 example

[0048] The following will refer to Figure 6-15(b) The device for measuring the degree of arteriosclerosis according to the second embodiment of the present invention will be described. To avoid redundant description, those parts that are the same as the corresponding parts of the first embodiment are given the same or similar reference numerals. These components will not be described in detail.

[0049] Refer to attached Figure 6 The degree of arteriosclerosis measurement unit 17 measures the degree of arteriosclerosis based on the amount of change in the pulse wave summation value when the compressive pressure changes, that is, the rate of change of the characteristic curve L2. The vascular stiffness measurement unit 17 calculates the rate of change ΔT / ΔP (slope of the characteristic line L2 ), which is the rate of change of the pulse wave integrated value corresponding to the compression pressure stored in the storage unit 16 . The vascular sclerosis measuring unit 17 c...

no. 3 example

[0068] The following will refer to Figure 16 A device for measuring the degree of hardening of blood vessels according to a third embodiment of the present invention will be described. In this embodiment, the pulse wave cumulative value calculation unit 15 uses the maximum value of the pulse wave cumulative value obtained from when the amplitude value of the pulse wave W1 is accumulated from the beginning to the end of the accumulation as a reference value, and uses the relative value of each pulse wave cumulative value The ratio of the maximum values ​​(hereinafter referred to as "pulse wave accumulation ratio") determines the degree of vascular sclerosis. The storage unit 16 stores the pulse wave accumulation ratio and the compression pressure which are correlated with each other.

[0069] The vascular stiffness measurement unit 17 is based on Figure 16 The characteristic line L3 shown measures the degree of arteriosclerosis. The vascular stiffness measuring unit 17 cal...

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Abstract

A circulatory function measurement device that accurately measures a subject's circulatory function. A pulse wave accumulated value calculation unit calculates a pulse wave accumulated value by accumulating the amplitude values of pulse waves in chorological order as the compressing pressure changes. A blood vessel hardness measurement unit measures blood vessel hardness based on the relationship between the calculated pulse wave accumulated value and the compressing pressure.

Description

technical field [0001] The present invention relates to a circulatory function measuring device that analyzes the state of a living body based on pulse waves generated by the living body. Background technique [0002] Early detection of arteriosclerosis has become possible by detecting circulating arteries with a circulatory function measuring device. An example of such a device is described in Japanese Patent Laid-Open No. 2005-278708. To use the device to test circulatory function, a wristband is first placed around the subject's upper arm, and then the wristband is inflated. The pressure (compression pressure) of the wristband presses on the upper arm and generates a pulse wave, which is used to measure circulatory functions such as the degree of arteriosclerosis. [0003] In testing with the device described in Japanese Patent Laid-Open No. 2005-278708, the compression pressure is slowly decreased at a constant rate within a predetermined range of compression pressure,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/02A61B5/021
CPCA61B5/02007A61B5/021A61B5/02108
Inventor 井出和宏日下部朋哉
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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