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Appraising surgeons learning sonography: measuring measurement variability.

Paul V Gallagher1, Simon T Elliott, Richard Charnley

  • 1Department of Surgery, Freeman Hospital, Freeman Road, Newcastle upon Tyne NE7 7DN, United Kingdom.

Journal of Clinical Ultrasound : JCU
|August 19, 2003
PubMed
Summary
This summary is machine-generated.

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This study shows that surgeons can accurately measure gallbladder dimensions using sonography after brief training, comparable to experienced radiologists. This essential skill is learnable and appraisable for clinical use.

Area of Science:

  • Medical Imaging
  • Diagnostic Ultrasound

Background:

  • Sonography is a versatile tool increasingly adopted by various medical professionals for specific tasks.
  • Assessing the measurement variability of non-specialist sonographers is crucial for ensuring diagnostic accuracy.

Purpose of the Study:

  • To evaluate the measurement variability of a surgeon with limited sonography training compared to an experienced radiologist.
  • To assess the learnability and appraisability of a fundamental sonographic skill: organ dimension measurement.

Main Methods:

  • An experienced radiologist and a trained surgeon performed triplicate gallbladder dimension measurements on 19 patients.
  • Standardized abdominal sonography procedures were used with identical equipment, and observers were blinded to each other's results.
  • Intraobserver and interobserver measurement variability were calculated using analysis of variance, reported as within-subject standard deviation and repeatability coefficients.

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Main Results:

  • Intraobserver variability for gallbladder dimensions was comparable between the radiologist and the surgeon.
  • Interobserver variability analysis demonstrated good agreement, with small standard deviations and defined limits of agreement for length, height, and width.
  • Repeatability coefficients were also similar, indicating consistent measurements within and between observers.

Conclusions:

  • Accurate organ dimension measurement is a fundamental and appraisable sonographic skill.
  • The study demonstrates that non-specialists, such as surgeons, can acquire this skill effectively after appropriate training.
  • The low measurement variability observed suggests that sonography skills learned by various clinicians are satisfactory for clinical application.