Real-time doppler-based arterial vascular impedance and peripheral pressure-flow loops: A pilot study

Robert H. Thiele, Karsten Bartels, Stephen Esper, Keita Ikeda, Tong Joo Gan

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Objective 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. Design Prospective, cohort study. Setting Single center, university-based teaching hospital. Participants Patients undergoing surgery in whom the attending anesthesiologist had opted to place an esophageal Doppler probe and a peripheral arterial catheter for hemodynamic monitoring. Interventions This was a non-interventional study designed to record pressure-flow loops and arterial vascular impedance intraoperatively using a novel, noninvasive device. Measurements and Main Results Pressure-flow loops and arterial vascular impedance were measured noninvasively using radial artery pressure and descending thoracic aorta flow waveforms in real time. Conclusions 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.

Original languageEnglish (US)
Pages (from-to)36-41
Number of pages6
JournalJournal of Cardiothoracic and Vascular Anesthesia
Volume28
Issue number1
DOIs
StatePublished - Feb 2014
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Anesthesiology and Pain Medicine

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