Document Detail

Noninvasive assessment of cardiac output using thoracic electrical bioimpedance in hemodynamically stable and unstable patients after cardiac surgery: a comparison with pulmonary artery thermodilution.
MedLine Citation:
PMID:  17039348     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To compare noninvasive cardiac output (CO)measurement obtained with a new thoracic electrical bioimpedance (TEB) device, using a proprietary modification of the impedance equation, with invasive measurement obtained via pulmonary artery thermodilution.
DESIGN: Prospective, observational study.
SETTING: Surgical intensive care unit (ICU) of a university-affiliated community hospital.
PATIENTS AND PARTICIPANTS: Seventy-four adult patients undergoing elective cardiac surgery with routine pulmonary artery catheter placement.
MEASUREMENTS AND RESULTS: Simultaneous paired CO and cardiac index (CI) measurements by TEB and thermodilution were obtained in mechanically ventilated patients upon admission to the ICU. For analysis of CI data the patients were subdivided into a hemodynamically stable group and a hemodynamically unstable group. The groups were analyzed using linear regression and tests of bias and precision. We found a significant correlation between thermodilution and TEB (r = 0.83; n < 0.001), accompanied by a bias of -0.01 l/min/m(2) and a precision of +/-0.57 l/min/m(2) for all CI data pairs. Correlation, bias, and precision were not influenced by stratification of the data. The correlation coefficient, bias, and precision for CI were 0.86 (n< 0.001), 0.03 l/min/m(2), and +/-0.47 l/min/m(2) in hemodynamically stable patients and 0.79 (n< 0.001), 0.06 l/min/m(2), and +/-0.68 l/min/m(2) in hemodynamically unstable patients.
CONCLUSIONS: Our results demonstrate a close correlation and clinically acceptable agreement and precision between CO measurements obtained with impedance cardiography using a new algorithm to calculate CO from variations in TEB, and those obtained with the clinical standard of care, pulmonary artery thermodilution, in hemodynamically stable and unstable patients after cardiac surgery.
Stefan Suttner; Thilo Schöllhorn; Joachim Boldt; Jochen Mayer; Kerstin D Röhm; Katrin Lang; Swen N Piper
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Publication Detail:
Type:  Comparative Study; Journal Article; Retracted Publication     Date:  2006-10-13
Journal Detail:
Title:  Intensive care medicine     Volume:  32     ISSN:  0342-4642     ISO Abbreviation:  Intensive Care Med     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-11-28     Completed Date:  2007-07-25     Revised Date:  2012-04-17    
Medline Journal Info:
Nlm Unique ID:  7704851     Medline TA:  Intensive Care Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2053-8     Citation Subset:  IM    
Department of Anesthesiology and Intensive Care Medicine, Klinikum der Stadt Ludwigshafen, Bremser Strasse 79, Ludwigshafen, Germany.
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MeSH Terms
Cardiac Output*
Cardiac Surgical Procedures
Catheterization, Swan-Ganz
Electric Impedance*
Linear Models
Monitoring, Physiologic / methods*
Postoperative Period
Thermodilution / methods*
Comment In:
Intensive Care Med. 2007 May;33(5):923   [PMID:  17387452 ]
Retraction In:
Intensive Care Med. 2011 Jul;37(7):1232   [PMID:  21604011 ]

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