Respiratory parameter estimation using forced oscillatory impedance data
نویسندگان
چکیده
منابع مشابه
Four and six parameter models of forced random noise respiratory impedance in normals.
Total respiratory impedance has been measured between 3-42 Hz by the forced random noise technique, in 15 subjects breathing either air or a helium oxygen mixture in three experimental conditions: at basal state, and then with a resistor or a tube added at the mouth. Impedance is modelled, either by a 4-parameter model (M4), derived from the series model (resistance, inertance, compliance) by m...
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1) Use of the complex wave oscillation method provided a measurement range of over 9 cmH201lls with a resolution of O.18 cmH20/1ls. 2) The respiratory system was expressed as a two-compartment model. By expressing the circuit characteristics as phasor loci, a method was shown whereby individual impedance parameter values could be derived frorn the measured impedance phasor loci. S) Vnder enflur...
متن کاملRespiratory input impedance during high frequency oscillatory ventilation.
Total respiratory input impedance (Zrs) measured by forced excitation may be computed easily from pressure and flow measurements recorded at the airway opening. The purpose of this paper was to analyse how the information provided by Zrs may be used for monitoring ventilatory mechanics during high frequency oscillatory ventilation (HFOV). We measured impedance (0.125-32 Hz) in six dogs, and in ...
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BACKGROUND Intravascular fluid shifts, mechanical ventilation and inhalational anesthetic drugs may contribute to intraoperative lung injury. This prospective observational study measured the changes in respiratory impedance resulting from inhalational anesthesia and mechanical ventilation in adults undergoing transurethral resection of bladder tumors. The components of respiratory impedance (r...
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ژورنال
عنوان ژورنال: Journal of Applied Physiology
سال: 1977
ISSN: 8750-7587,1522-1601
DOI: 10.1152/jappl.1977.43.2.322