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Study of the dynamics of transcephalic cerebral impedance data during cardio-vascular surgery
KTH, School of Technology and Health (STH), Medical Engineering, Medical sensors, signals and systems.ORCID iD: 0000-0002-0928-8501
KTH, School of Technology and Health (STH), Medical Engineering, Medical sensors, signals and systems.ORCID iD: 0000-0002-6995-967X
KTH, School of Technology and Health (STH), Medical Engineering, Medical sensors, signals and systems.
2013 (English)In: XV International Conference on Electrical Bio-Impedance (ICEBI) & XIV Conference on Electrical Impedance Tomography (EIT), Institute of Physics (IOP), 2013, Vol. 434, no 1, 012045- p.Conference paper (Refereed)
Abstract [en]

Postoperative neurological deficits are one of the risks associated with cardio vascular surgery, necessitating development of new techniques for cerebral monitoring. In this study an experimental observation regarding the dynamics of transcephalic Electrical Bioimpedance (EBI) in patients undergoing cardiac surgery with and without extracorporeal circulation (ECC) was conducted to investigate the potential use of electrical Bioimpedance for cerebral monitoring in cardio vascular surgery. Tetrapolar transcephalic EBI measurements at single frequency of 50 kHz were recorded prior to and during cardio vascular surgery. The obtained results show that the transcephalic impedance decreases in both groups of patients as operation starts, however slight differences in these two groups were also observed with the cerebral impedance reduction in patients having no ECC being less common and not as pronounced as in the ECC group. Changes in the cerebral impedance were in agreement with changes of haematocrit and temperature. The origin of EBI changes is still unexplained however these results encourage us to continue investigating the application of electrical bioimpedance cerebral monitoring clinically.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2013. Vol. 434, no 1, 012045- p.
, Journal of Physics: Conference Series, ISSN 1742-6588 ; 434
Keyword [en]
Cardiac surgery, Cerebral monitoring, Electrical bio-impedance, Experimental observation, Extracorporeal circulation, Neurological deficit, Single frequency, Vascular surgery, Cardiovascular surgery, Electric impedance tomography, Electric impedance
National Category
Medical Engineering
URN: urn:nbn:se:kth:diva-134475DOI: 10.1088/1742-6596/434/1/012045ISI: 000326512200045ScopusID: 2-s2.0-84877358321OAI: diva2:668325
15th International Conference on Electrical Bio-Impedance, ICEBI 2013 and 14th Conference on Electrical Impedance Tomography, EIT 2013; Heilbad Heiligenstadt; Germany; 22 April 2013 through 25 April 2013

QC 20131129

Available from: 2013-11-29 Created: 2013-11-25 Last updated: 2013-12-06Bibliographically approved

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