Additional hemodynamic measurements with an esophageal Doppler monitor: A preliminary report of compliance, force, kinetic energy, and afterload in the clinical setting

Document Type

Article

Publication Date

12-1-2012

Abstract

The esophageal Doppler monitor (EDM) is a minimally-invasive hemodynamic device which evaluates both cardiac output (CO), and fluid status, by estimating stroke volume (SV) and calculating heart rate (HR). The measurement of these parameters is based upon a continuous and accurate approximation of distal thoracic aortic blood flow. Furthermore, the peak velocity (PV) and mean acceleration (MA), of aortic blood flow at this anatomic location, are also determined by the EDM. The purpose of this preliminary report is to examine additional clinical hemodynamic calculations of: compliance (C), kinetic energy (KE), force (F), and afterload (TSVRi). These data were derived using both velocity-based measurements, provided by the EDM, as well as other contemporaneous physiologic parameters. Data were obtained from anesthetized patients undergoing surgery or who were in a critical care unit. A graphical inspection of these measurements is presented and discussed with respect to each patient's clinical situation. When normalized to each of their initial values, F and KE both consistently demonstrated more discriminative power than either PV or MA. The EDM offers additional applications for hemodynamic monitoring. Further research regarding the accuracy, utility, and limitations of these parameters is therefore indicated. © 2012 Springer Science+Business Media, LLC.

Identifier

84877154933 (Scopus)

Publication Title

Journal of Clinical Monitoring and Computing

External Full Text Location

https://doi.org/10.1007/s10877-012-9386-5

e-ISSN

15732614

ISSN

13871307

PubMed ID

22892852

First Page

473

Last Page

482

Issue

6

Volume

26

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