Blood state evaluation device, blood state evaluation system, blood state evaluation method, and program

Abstract

A blood state evaluation device, blood state evaluation system, blood state evaluation method, and program that enable evaluation of the risk of thrombosis easily and precisely is provided. An electrical characteristic of blood being an evaluation target is chronologically measured in two or more frequencies or two or more frequency bands. On the basis of chronological change data of the measured electrical characteristic of the blood, a state of blood is evaluated.

1 . A blood state evaluation device comprising at least:
 an evaluation unit configured to evaluate a state of blood on the basis of chronological change data of an electrical characteristic of the blood in two or more frequencies or frequency bands.   
     
     
         2 . The blood state evaluation device according to  claim 1 ,
 wherein the evaluation unit extracts at least one feature point from the chronological change data of the electrical characteristic.   
     
     
         3 . The blood state evaluation device according to  claim 2 ,
 wherein the at least one feature point is a change amount δE (=E(f x ,t y )/E(f x ,t a )) in an electrical characteristic value E in a given frequency f x  from a reference time t a  to a given time t y .   
     
     
         4 . The blood state evaluation device according to  claim 1 ,
 wherein the evaluation unit digitalizes the chronological change data of the electrical characteristic.   
     
     
         5 . The blood state evaluation device according to  claim 4 ,
 wherein the evaluation unit evaluates the state of the blood by comparing a determination value calculated from the chronological change data of the electrical characteristic with a predetermined threshold.   
     
     
         6 . The blood state evaluation device according to  claim 1 ,
 wherein the evaluation unit evaluates the state of the blood by an increase and/or a decrease in an electrical characteristic value E in a given frequency f x  on the basis of the chronological change data of the electrical characteristic.   
     
     
         7 . The blood state evaluation device according to  claim 1 ,
 wherein the electrical characteristic is at least one kind of values selected from impedance, conductance, admittance, capacitance, permittivity, conductivity, phase angle, and a quantity obtained by conversing such a value into a quantity of electricity.   
     
     
         8 . The blood state evaluation device according to  claim 1 ,
 wherein the evaluation unit evaluates a coagulation state of the blood.   
     
     
         9 . The blood state evaluation device according to  claim 1 , further comprising:
 a measurement unit configured to chronologically measure the electrical characteristic of blood being an evaluation target, in a particular frequency or frequency band.   
     
     
         10 . A blood state evaluation system comprising:
 an electrical characteristic measurement device including a measurement unit that chronologically measures an electrical characteristic of blood being an evaluation target, in a particular frequency or frequency band; and   a blood state evaluation device including an evaluation unit that evaluates a state of the blood on the basis of chronological change data in two or more frequencies or frequency bands from among electrical characteristics measured by the electrical characteristic measurement device.   
     
     
         11 . The blood state evaluation system according to  claim 10  further comprising:
 a server including an information storage unit that stores a result of measurement in the permittivity measurement device and/or a result of evaluation in the blood state evaluation device, 
 wherein the server is connected to the permittivity measurement device and/or the blood state evaluation device through a network. 
 
     
     
         12 . A blood state evaluation method comprising:
 an electrical characteristic measurement step of chronologically measuring an electrical characteristic of blood being an evaluation target in a particular frequency or frequency band; and   a blood state evaluation step of evaluating a state of the blood on the basis of chronological change data in two or more frequencies or frequency bands from among electrical characteristics measured in the electrical characteristic measurement step.   
     
     
         13 . (canceled)