Noninvasive Cardiac Output Measurement by Transthoracic Electrical Bioimpedence: Influence of Age and Gender
Thoracic electrical bioimpedance (TEB) as a method of measuring cardiac output (CO) is being explored increasingly over the last two decades, as a non-invasive alternative to the pulmonary artery catheter. The objective of this study was to establish normative data for measurement of CO by TEB and define the effect of age and gender on CO.
Stroke volume (SV) of 397 normal individuals (203 men, 194 women) in the age range of 10–77 years was determined using Kubisek and Bernstein formulae by TEB method. Derived cardiac parameters including CO, cardiac index (CI), systemic vascular resistance and resistance index were calculated and analyzed.
We found significant difference in CO among age groups and between gender. CO between Kubicek formula and Bernstein formula correlated well, but their means differed significantly. Cardiac indices peak in the third and seventh decade and were comparable between genders.
A comprehensive data set of normalized values expressed as 95% confidence interval and mean ± SD in different age groups and different gender was possible for cardiac parameters using TEB.
Key Wordsbio impedance TEB non invasive cardiac output
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- 5.Shoemaker WC, Wo CC, Bishop MH et al. Multicenter trial of a new thoracic electrical bioimpedance device for cardiac output estimation. Crit Care Med 1994 Dec; 22(12): 1907–1912.Google Scholar
- 11.Gujjar AR, Muralidhar K, Banakal S, Gupta R, Sathyaprabha TN, Jairaj PS. Non-invasive cardiac output by transthoracic electrical bioimpe-dence in post-cardiac surgery patients: comparison with thermodilution method. J Clin Monit Comput 2008; 22: 175–180.Google Scholar
- 12.Kinnen E, Kubicek W, Witsoe D. Thoracic cage impedance measurements. Impedance plythysmographic determination of cardiac output (An interpretative Study). Techn Docum Rep No. SAM-TDR-64-23.AMD TR Rep. 1964 May; 1–12.Google Scholar
- 13.Bnuta AC, Babu JP, Jindal GD,Parulkar GB (1990) Technical aspects of impedance plethysmography. J Postgrad Med 36(2):64–70.Google Scholar
- 17.Sandham JD, Hull RD, Brant RF (2003) A Randomized, Controlled Trial of the Use of Pulmonary-Artery Catheters in High-Risk Surgical Patients. Indian J Crit Care Med 7:54–55.Google Scholar
- 20.Wong Kl, Hou PC (1996) The accuracy of bioimpedance cardiography in the measurement of cardiac output in comparison with thermodilution method. Acta Anaesthesiol 34(2):55–9.Google Scholar
- 21.Zacek P, Kunes P, Kobzova E (1999) Thoracic electrical bioimpedance versus thermodilution in patients post open-heart surgery. Acta Medica (Hradec Kralove) 42(1):19–23.Google Scholar
- 22.Weber J,Heidelmeyer CF,Kubatz F et al (1986) Determination of cardiac output under PEEP-respiration with the “NCCOM 3” non-invasive bioimpedence monitor in comparison with the thermodilution method A study in anesthetized dogs [Article in German]. Aesthesist 35(12):744–7.Google Scholar
- 24.Imhoff M, Lehner JH, Lohlein D, Ziegler D, Grotti L, Krucke G. Noninvasive whole-body electrical bioimpedance cardiac output and invasive thermodilution cardiac output in high-risk surgical patients. Crit Care Med 2000; 28(8): 2812–2818.Google Scholar