Electrical impedance tomography in extremely prematurely born infants and during high frequency oscillatory ventilation analyzed in the frequency domain.

Dunlop, Scott; Hough, Judy; Riedel, Thomas; Fraser, John F; Dunster, Kimble; Schibler, Andreas (2006). Electrical impedance tomography in extremely prematurely born infants and during high frequency oscillatory ventilation analyzed in the frequency domain. Physiological measurement, 27(11), pp. 1151-1165. Institute of Physics Publishing IOP 10.1088/0967-3334/27/11/008

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Functional electrical impedance tomography (EIT) measures relative impedance change that occurs in the chest during a distinct observation period and an EIT image describing regional relative impedance change is generated. Analysis of such an EIT image may be erroneous because it is based on an impedance signal that has several components. Most of the change in relative impedance in the chest is caused by air movement but other physiological events such as cardiac activity change in end expiratory level or pressure swings originating from a ventilator circuit can influence the impedance signal. We obtained EIT images and signals in spontaneously breathing healthy adults, in extremely prematurely born infants on continuous positive airway pressure and in ventilated sheep on conventional mechanical or high frequency oscillatory ventilation (HFOV). Data were analyzed in the frequency domain and results presented after band pass filtering within the frequency range of the physiological event of interest. Band pass filtering of EIT data is necessary in premature infants and on HFOV to differentiate and eliminate relative impedance changes caused by physiological events other than the one of interest.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine
04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine > Paediatric Intensive Care

UniBE Contributor:

Riedel, Thomas

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0967-3334

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Anette van Dorland

Date Deposited:

28 Apr 2022 09:23

Last Modified:

28 Apr 2022 09:23

Publisher DOI:

10.1088/0967-3334/27/11/008

PubMed ID:

17028408

BORIS DOI:

10.48350/169572

URI:

https://boris.unibe.ch/id/eprint/169572

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