FPGA-BASED PHASE AND MODULE IMPEDANCE METER

被引：0
|
作者：
Gomez Lopez, M. A. [1 ]
Migliorino, F. A. [1 ]
Goy, C. B. [1 ,2 ,3 ]
Acuna, J. B. [1 ]
Herrera, M. C. [2 ,3 ]
机构：
[1] Univ Nacl Tucuman, Fac Ciencias Exactas & Tecnol, Dept Elect Elect & Computac, Av Independencia 1900, San Miguel De Tucuman, Argentina
[2] Univ Nacl Tucuman, Fac Ceincias Exactas & Tecnol, Dept Bioingn, LICaM, San Miguel De Tucuman, Argentina
[3] INSIBIO, CONICET, San Miguel De Tucuman, Argentina
来源：
19TH ARGENTINEAN BIOENGINEERING SOCIETY CONGRESS (SABI 2013) | 2013年 / 477卷
关键词：
D O I：
10.1088/1742-6596/477/1/012006
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
A conductance catheter system measures the left ventricle volume by measuring the blood conductance in the cavity. It is known that there are some limitations and errors related to these assumptions. New trends claim that a nonlinear conductance-volume relationship is observed and volume measurement not only has a resistive behavior but also has a capacitive component. It is exclusively due to the myocardial muscle; even further, myocardial impedance varies in both phase and magnitude between end systole and end diastole decreasing the accuracy of volume measurement. The incorporation of an appropriate technology catheter system based on FPGA is proposed allowing measure impedances instead of conductances. Thus, the system can measure impedance module and phase in order to accurately estimate the left ventricle blood volume. The system is digitally designed and evaluated with known pattern impedances with electrical characteristics similar to those presented in the left ventricle (module range of 6.8. to 47. and phases from 2 degrees to 90 degrees).
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页数：10
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