Send to

Choose Destination
See comment in PubMed Commons below
J Cardiothorac Vasc Anesth. 2014 Feb;28(1):36-41. doi: 10.1053/j.jvca.2013.04.021. Epub 2013 Sep 25.

Real-time Doppler-based arterial vascular impedance and peripheral pressure-flow loops: a pilot study.

Author information

  • 1Technology in Anesthesia and Critical Care Group, University of Virginia, Charlottesville, VA. Electronic address:
  • 2Department of Anesthesiology, University of Colorado Denver, Aurora, CO.
  • 3Department of Anesthesiology, University of Pittsburgh, Pittsburgh, PA.
  • 4Department of Anesthesiology, Duke University, Durham, NC.



Arterial pressure-flow loops and vascular impedance provide additional data that could be used to assess the hemodynamic effects of therapeutic interventions in anesthetized patients. To evaluate the utility of such an approach, the authors sought to design a device that combines flow waveforms from an esophageal Doppler probe and pressure waveforms from a peripheral artery to produce real-time pressure-flow loops and estimates of arterial vascular impedance.


Prospective, cohort study.


Single center, university-based teaching hospital.


Patients undergoing surgery in whom the attending anesthesiologist had opted to place an esophageal Doppler probe and a peripheral arterial catheter for hemodynamic monitoring.


This was a non-interventional study designed to record pressure-flow loops and arterial vascular impedance intraoperatively using a novel, noninvasive device.


Pressure-flow loops and arterial vascular impedance were measured noninvasively using radial artery pressure and descending thoracic aorta flow waveforms in real time.


Real-time arterial vascular impedance and peripheral pressure-volume loops can be determined using available monitoring devices. Technical feasibility of this technology in patients is a crucial first step to permit meaningful evaluation of the clinical value of this approach for accurate determination of complex hemodynamic indices and, eventually, improvement of outcomes.

Copyright © 2014 Elsevier Inc. All rights reserved.


arterial waveforms, monitoring; doppler; hemodynamics; impedance; pressure flow loops

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk