Title :
Impedance estimation in small endotracheal tubes with forced random noise analysis
Author :
Quint, Stephen R. ; Wood, Brian R. ; Zhao, Chengfeng ; Fullton, James M.
Author_Institution :
North Carolina Univ., Chapel Hill, NC, USA
Abstract :
Small endotracheal tubes of the sizes commonly used in ventilated neonates are modeled as linear systems below 20 Hz. Adequate power is transmitted via these small tubes with a bandwidth sufficiently wide to make the determination of pulmonary impedance possible. Endotracheal tube impedance is determined from flow, input pressure and output pressure signals and is relatively independent of load. Endotracheal tube output pressure is reliably predicted from flow, input pressure, and endotracheal tube impedance. Results from this study indicate that predicted endotracheal tube output pressure, along with flow, can be used to determine respiratory system impedance
Keywords :
pneumodynamics; flow; forced random noise analysis; impedance estimation; input pressure; linear systems; output pressure; respiratory system impedance; small endotracheal tubes; ventilated neonates; Biological system modeling; Computer displays; Fluid flow measurement; Immune system; Impedance measurement; Lungs; Pediatrics; Power system modeling; Respiratory system; Ventilation;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95714
