Title :
Determination of vascular input impedance in near real-time using a portable microcomputer
Author :
Purut, Cemil M. ; Craig, Damian M. ; McGoldrick, Joseph P. ; Smith, Peter K.
Author_Institution :
Duke Univ. Med. Center, Durham, NC, USA
Abstract :
A method for determining vascular input impedance using a portable laptop computer coupled to more conventional laboratory measurement equipment is described. The major impediment overcome in the clinical implementation of this microcomputer-based system was the rapid Fourier transformation of pulsatile pressure and flow waveforms from time domain to frequency domain. To meet this need, software was written to allow gating of data collection and Fourier analysis in a continually repetitive, alternating manner in synchrony with the cardiac cycle. High computational speed was achieved by using a math coprocessor and limiting the Fourier analysis to hemodynamically important harmonics of heart rate
Keywords :
biomedical measurement; haemodynamics; medical diagnostic computing; microcomputer applications; cardiac cycle synchronisation; data collection gating; flow waveforms; frequency domain; heart rate; hemodynamically important harmonics; laboratory measurement equipment; math coprocessor; microcomputer-based system; portable laptop computer; pulsatile pressure; rapid Fourier transformation; time domain; vascular input impedance; Blood flow; Data analysis; Harmonic analysis; Heart rate; Hemodynamics; Immune system; Impedance measurement; Laboratories; Microcomputers; Portable computers;
Conference_Titel :
Computer-Based Medical Systems, 1990., Proceedings of Third Annual IEEE Symposium on
Conference_Location :
Chapel Hill, NC
Print_ISBN :
0-8186-9040-2
DOI :
10.1109/CBMSYS.1990.109406
