DocumentCode :
3190518
Title :
An algorithm to improve the estimation accuracy of a non-invasive method for cardiac output measurement based on prolonged expiration
Author :
Schena, E. ; Cecchini, S. ; Saccomandi, P. ; Leuzzi, M. ; Silvestri, Stefano
Author_Institution :
Unit of Meas. & Biomed. Instrum., Univ. Campus Bio-Medico di Roma, Rome, Italy
fYear :
2013
fDate :
3-7 July 2013
Firstpage :
1823
Lastpage :
1826
Abstract :
Cardiac output (CO) monitoring is important in the hemodynamic management of critically ill patients. In a previous study, a novel non-invasive technique for CO monitoring based on prolonged expiration was proposed. The novel method showed good agreement with thermodilution on stable mechanically ventilated patients; unstable patients were excluded. The aim of this study is to improve the outcome of the above mentioned method on hemodynamic unstable patients, requiring vasoactive medications, and showing marked cardiogenic oscillations on waveforms related to expired gases. This prospective study has been carried out on three cardiac surgery patients; eighteen CO measurements were performed on each patient, and these values were compared with data obtained by thermodilution. The designed and tested algorithm allowed to reach a good agreement between CO measured by our method and by thermodilution (e.g., the mean percentage differences were 4%, 11% and 3%). Even though further validation is necessary, the results are quite promising and the adopted solution appears to allow the suitability of the prolonged expiration method also on unstable patients.
Keywords :
biomedical measurement; cardiology; diseases; estimation theory; haemodynamics; oscillations; patient monitoring; surgery; waveform analysis; cardiac output measurement; cardiac output monitoring; cardiac surgery patients; critically ill patients; estimation accuracy; expired gases; hemodynamic management; hemodynamic unstable patients; marked cardiogenic oscillations; noninvasive method; prolonged expiration method; stable mechanically ventilated patients; thermodilution; vasoactive medications; waveforms; Biomedical measurement; Estimation; Fitting; Gases; Market research; Monitoring; Oscillators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE
Conference_Location :
Osaka
ISSN :
1557-170X
Type :
conf
DOI :
10.1109/EMBC.2013.6609877
Filename :
6609877
Link To Document :
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