Skip to main content
main-content

17.10.2019 | Original Research | Ausgabe 5/2020

Journal of Clinical Monitoring and Computing 5/2020

Noninvasive measurement of stroke volume changes in critically ill patients by means of electrical impedance tomography

Zeitschrift:
Journal of Clinical Monitoring and Computing > Ausgabe 5/2020
Autoren:
Fabian Braun, Martin Proença, Anna Wendler, Josep Solà, Mathieu Lemay, Jean-Phillipe Thiran, Norbert Weiler, Inéz Frerichs, Tobias Becher
Wichtige Hinweise

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Previous animal experiments have suggested that electrical impedance tomography (EIT) has the ability to noninvasively track changes in cardiac stroke volume (SV). The present study intended to reproduce these findings in patients during a fluid challenge. In a prospective observational study including critically ill patients on mechanical ventilation, SV was estimated via ECG-gated EIT before and after a fluid challenge and compared to transpulmonary thermodilution reference measurements. Relative changes in EIT-derived cardiosynchronous impedance changes in the heart (\(\Delta {\text{Z}}_{\text{H}}\)) and lung region (\(\Delta {\text{Z}}_{\text{L}}\)) were compared to changes in reference SV by assessing the concordance rate (CR) and Pearson’s correlation coefficient (R). We compared 39 measurements of 20 patients. \(\Delta {\text{Z}}_{\text{H}}\) did not show to be a reliable estimate for tracking changes of SV (CR = 52.6% and R = 0.13 with P = 0.44). In contrast, \(\Delta {\text{Z}}_{\text{L}}\) showed an acceptable trending performance (CR = 94.4% and R = 0.72 with P < 0.0001). Our results indicate that ECG-gated EIT measurements of \(\Delta {\text{Z}}_{\text{L}}\) are able to noninvasively monitor changes in SV during a fluid challenge in critically ill patients. However, this was not possible using \(\Delta {\text{Z}}_{\text{H}}\). The present approach is limited by the influences induced by ventilation, posture or changes in electrode–skin contact and requires further validation.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

★ PREMIUM-INHALT
e.Med Interdisziplinär

Für Ihren Erfolg in Klinik und Praxis - Die beste Hilfe in Ihrem Arbeitsalltag als Mediziner

Mit e.Med Interdisziplinär erhalten Sie Zugang zu allen CME-Fortbildungen und Fachzeitschriften auf SpringerMedizin.de.

Alle e.Med Abos bis 30. April 2021 zum halben Preis!

Jetzt e.Med zum Sonderpreis bestellen!

Literatur
Über diesen Artikel

Weitere Artikel der Ausgabe 5/2020

Journal of Clinical Monitoring and Computing 5/2020 Zur Ausgabe

Neu im Fachgebiet AINS

Mail Icon II Newsletter

Bestellen Sie unseren kostenlosen Newsletter Update AINS und bleiben Sie gut informiert – ganz bequem per eMail.

Bildnachweise