Additional hemodynamic measurements with an esopha

Authors: Glen Atlas David Brealey Sunil Dhar Gerhard Dikta Meryvn Singer

Publish Date: 2012/08/15

Volume: 26, Issue: 6, Pages: 473-482

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Abstract

The esophageal Doppler monitor EDM is a minimallyinvasive 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 velocitybased 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 indicatedGlen Atlas Has neither financial disclosures nor conflicts of interests David Brealey Has neither financial disclosures nor conflicts of interests Sunil Dhar Has neither financial disclosures nor conflicts of interests Gerhard Dikta Has neither financial disclosures nor conflicts of interests Mervyn Singer Is on the advisory board of Deltex Medical and also has received an unrestricted donation into his research fund University College London holds shares in Deltex Medical bestowed by the charitable trust of its late founder

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