Abstract
PURPOSE: Rapid prediction of the effect of volume expansion (VE) is crucial in hemodynamically unstable patients on mechanical ventilation. While accurate, both radial artery pulse pressure variation (ΔPP) and changes of aortic blood flow peak velocity (ΔVPeakAo) have limitations that make them impractical as point-of-care tools. In this study, we sought to determine whether respiratory changes in the brachial artery blood flow velocity (VPeakBA) as measured by Internal Medicine residents using a hand-carried ultrasound (HCU) could provide an accurate corollary to ΔPP in mechanically ventilated patients.
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