J Clin Monit Comput - Additional hemodynamic measurements with an esophageal Doppler monitor: a preliminary report of compliance, force, kinetic energy, and afterload in the clinical setting.

Tópicos

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Resumo

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 (TSVR(i)). 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.

Resumo Limpo

esophag doppler monitor edm minimallyinvas hemodynam devic evalu cardiac output co fluid status estim stroke volum sv calcul heart rate hr measur paramet base upon continu accur approxim distal thorac aortic blood flow furthermor peak veloc pv mean acceler ma aortic blood flow anatom locat also determin edm purpos preliminari report examin addit clinic hemodynam calcul complianc c kinet energi ke forc f afterload tsvri data deriv use velocitybas measur provid edm well contemporan physiolog paramet data obtain anesthet patient undergo surgeri critic care unit graphic inspect measur present discuss respect patient clinic situat normal initi valu f ke consist demonstr discrimin power either pv ma edm offer addit applic hemodynam monitor research regard accuraci util limit paramet therefor indic

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