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Related Experiment Videos

The pocket echocardiograph: validation and feasibility.

Benjamin C Culp1, Jonathan D Mock, Christopher D Chiles

  • 1Department of Internal Medicine, The TexasA&M University System Health Science Center College of Medicine/Scott and White Hospital, Temple, TX, USA. bcculp@swmail.sw.org

Echocardiography (Mount Kisco, N.Y.)
|April 24, 2010
PubMed
Summary

Novice echocardiographers can create interpretable cardiac images using a pocket echocardiograph (PE). This portable device accurately quantifies ejection fraction, enhancing bedside cardiovascular assessment availability.

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Area of Science:

  • Cardiology
  • Medical Imaging
  • Ultrasound Technology

Background:

  • A novel, miniaturized pocket echocardiograph (PE) offers high portability.
  • Limited studies exist on PE, particularly concerning its use by novice echocardiographers.
  • Hypothesis: Novices can obtain interpretable cardiac images with PE and accurately measure ejection fraction.

Purpose of the Study:

  • To evaluate the capability of novice echocardiographers in acquiring interpretable cardiac images using a pocket echocardiograph (PE).
  • To assess the accuracy of ejection fraction quantification by both novice and expert echocardiographers using the PE device.
  • To determine the technical adequacy and interpretability of cardiac images produced by the PE device.

Main Methods:

  • 40 subjects underwent simultaneous formal transthoracic echocardiography (TTE) and PE imaging.

Related Experiment Videos

  • A cardiology fellow with 2 months of training acquired PE images.
  • Blinded offline interpretation of PE studies by the fellow and an experienced echocardiographer, comparing results to TTE.

    • Main Results:

    • All PE studies were interpretable; 77.5% of PE images and 85% of TTE images were technically adequate (P = 0.32).
    • Ejection fraction correlation was good for the novice (r = 0.78) and stronger for the expert (r = 0.88).
    • Bias and limits of agreement for ejection fraction were -5.9% ±16.6% (novice) and -0.8% ±11.4% (expert).

    Conclusions:

    • Novice echocardiographers can successfully produce adequate quality cardiac images with the PE device.
    • The PE enables accurate ejection fraction quantification by both novice and experienced users across diverse patients.
    • The PE's portability and low cost can significantly increase access to bedside echocardiography for cardiovascular assessments.