Apparatus and method for analyzing in vivo component and impedance measuring apparatus

Abstract

An apparatus for analyzing an in vivo component is provided. The apparatus for analyzing an in vivo component may include an impedance sensor including a first electrode and a second electrode configured to contact a fluid channel of a fluid to be analyzed. The apparatus may include an impedance measurement device configured to apply a current to the first electrode and the second electrode, measure a voltage between the first electrode and the second electrode based on applying the current, and measure an impedance of the fluid based on the measured voltage. The apparatus may include a processor configured to model the measured impedance using an equivalent circuit; and analyze the in vivo component based on modeling the measured impedance using the equivalent circuit.

What is claimed is: 
     
         1 . A method of analyzing an in vivo component, the method comprising:
 applying a current to a first electrode and a second electrode of an impedance sensor;   measuring a voltage between the first electrode and the second electrode based on applying the current;   measuring an impedance of a fluid to be analyzed based on the measured voltage;   modeling the measured impedance using an equivalent circuit; and   analyzing the in vivo component based on modeling the measured impedance using the equivalent circuit.   
     
     
         2 . The method of  claim 1 , wherein the modeling of the measured impedance using the equivalent circuit comprises reducing an effect of noise, including at least one of a parasitic component and a polarization effect of the impedance sensor, from the measured impedance. 
     
     
         3 . The method of  claim 1 , wherein the modeling of the measured impedance using the equivalent circuit comprises extracting one or more parameters, related to properties of the fluid to be analyzed, based on the modeling the equivalent circuit. 
     
     
         4 . The method of  claim 3 , wherein the analyzing of the in vivo component comprises obtaining a parameter variation by normalizing the extracted one or more parameters using a parameter at a reference time. 
     
     
         5 . The method of  claim 4 , wherein the analyzing of the in vivo component comprises obtaining an estimated in vivo component value, including at least one of blood glucose, cholesterol, triglyceride, protein, and uric acid, by applying an in vivo component analysis model to the parameter variation. 
     
     
         6 . The method of  claim 1 , further comprising adjusting at least one of a temperature and a flow property of the fluid to be analyzed. 
     
     
         7 . An impedance measuring apparatus comprising:
 a first electrode configured to contact a first side of a fluid channel of a fluid to be analyzed;   a second electrode configured to contact a second side of the fluid channel of the fluid to be analyzed, and that is disposed to face the first electrode;   a fluid property adjustment device configured to adjust a property of the fluid to be analyzed; and   an impedance measurement device configured to:
 apply a current to the first electrode and the second electrode; 
 measure a voltage between the first electrode and the second electrode based on applying the current; and 
 measure an impedance of the fluid based on the measured voltage.