DocumentCode :
2208353
Title :
Regional ventilation and perfusion assessed by electrical impedance imaging
Author :
Newell, J.C. ; Isaacson, D. ; Blue, R.S.
Author_Institution :
Rensselaer Polytech. Inst., Troy, NY, USA
Volume :
2
fYear :
1996
fDate :
31 Oct-3 Nov 1996
Firstpage :
780
Abstract :
Electrical impedance images of the chest of a dog were made while ventilating the lung unilaterally using a tracheal divider. Admittivity of the lungs decreased with inspiration only on the ventilated side, to an extent proportional to tidal volume. During breath-holding, a Swan-Ganz catheter balloon was inflated in a major branch of the pulmonary artery, diverting flow from a substantial pulmonary segment. The phasic admittivity signal in one region of interest in the chest image increased abruptly when the occlusion was released. In a second region in the same images, a simultaneous decrease in admittivity was seen. We conclude that regional ventilation and perfusion can be assessed in impedance images
Keywords :
biomedical measurement; electric impedance imaging; image reconstruction; lung; medical image processing; patient monitoring; pneumodynamics; breath-holding; continuous monitor; dog chest; electrical impedance imaging; image reconstruction; inspiration; lung ventilation; occlusion release; perfusion; phasic admittivity signal; pulmonary artery; real-time measurements; regional ventilation; tidal volume; tracheal divider; Arteries; Catheters; Electrodes; Image restoration; Image segmentation; Impedance measurement; Lungs; Surface impedance; Tomography; Ventilation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
Type :
conf
DOI :
10.1109/IEMBS.1996.651973
Filename :
651973
Link To Document :
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