| Summary: | 碩士 === 國立臺灣大學 === 電機工程學系 === 85 === The research project is to use the bioelectric impedance
measurement technique that is applied to measure the most
important physilogical parameters of the cardiac-pulmonary
organs, such as heart rate (HR),respiration rate(RR) and
cardiac output (CO) and develop an impedance cardiography.
A pair of flat mounted button type excitation electrodes
and pick-up electrodes, home-made 100KHZ(1mA)sine ware
stimulated current source, AC amplifier with gain 500 as a
signal conditioning circuit and the low-pass filter as well as
12 bit analog to digital convector(A/D C) to process the
signal and convert to the digital signal. A personal computer
has been
used to process and calculate the HR and RR parameters. The
Kubicek's model is employed to calculate the cardiac output
(CO).
After electrical characterization and test of our designed
and implemented ICG measurement system, we also carried out
to measure 3 major physiological parameters of the cardiac-
pulmonary organs. The preliminary experimental results of this
home-made ICG measurement system showed that it has very
good repetability and reliability. The accurary of the HR
measurement is rough to 3% and CO value is within the reason-
able range. The RR value is also presented satisfied results
with-
in 10% after the digital processing. However, the realisyic
accuracy of this three physiological parameters indeed to
perform the calibiation with the other methods in future clinic
expermental study.
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