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Titolo:
EVALUATION OF THE TRACKING POTENTIAL OF A NONINVASIVE ESTIMATOR OF CARDIAC-OUTPUT
Autore:
REDLING J; AKAY M;
Indirizzi:
RUTGERS STATE UNIV,DEPT BIOMED ENGN,POB 909 PISCATAWAY NJ 08855 RUTGERS STATE UNIV,DEPT BIOMED ENGN PISCATAWAY NJ 08855
Titolo Testata:
Computers in biology and medicine
fascicolo: 4, volume: 26, anno: 1996,
pagine: 281 - 295
SICI:
0010-4825(1996)26:4<281:EOTTPO>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Keywords:
NONINVASIVE CARDIAC OUTPUT; PRESSURE PULSE; FAST FOURIER TRANSFORM; AORTIC MODELING; SIMPLEX OPTIMIZATION; THERMODILUTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
CompuMath Citation Index
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
J. Redling e M. Akay, "EVALUATION OF THE TRACKING POTENTIAL OF A NONINVASIVE ESTIMATOR OF CARDIAC-OUTPUT", Computers in biology and medicine, 26(4), 1996, pp. 281-295

Abstract

A robust, automatic measurement system for calculating cardiac outputnoninvasively has recently been developed. The proposed method relieson fast Fourier transform (FFT) analysis of pulses measured externally at the carotid and femoral pressure points. A transfer function of the aorta is computed from these (calibrated) pressure measurements, and a tapered model of the aorta is parametrically adapted so that its transfer function matches that derived experimentally. Incorporated in the system are a custom routine for digitally filtering pressure data and a simplex optimization algorithm for identification of aortic parameters essential to the calculation of impedance and aortic Bow. Once flow has been reconstructed in the time domain it is averaged to a stroke volume and multiplied by the heart rate to yield cardiac output. Flow measurements are computed over several pulses and compared againstthe standard, invasive procedure of thermodilution. Preliminary results for a dynamic investigation of the method indicate a strong potential for tracking changes in cardiac output over time, thus advocating its use in monitoring hemodynamically unstable patients.

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Documento generato il 11/08/20 alle ore 14:55:56