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Related Experiment Videos

Probing for thoracic pedicle screw tract violation(s): is it valid?

Ronald A Lehman1, Benjamin K Potter, Timothy R Kuklo

  • 1Orthopaedic Surgery Service, Walter Reed Army Medical Center, Washington, DC, USA.

Journal of Spinal Disorders & Techniques
|July 29, 2004
PubMed
Summary

Surgeons

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Area of Science:

  • Spine surgery
  • Orthopedic surgery
  • Surgical technique

Background:

  • Thoracic pedicle screw placement requires accurate tract preparation.
  • Detecting pedicle wall violations before screw insertion via probing is unstudied.
  • Evaluating surgeon accuracy in identifying thoracic pedicle screw tract violations is crucial.

Purpose of the Study:

  • To assess inter- and intraobserver agreement in detecting thoracic pedicle screw tract violations.
  • To evaluate the accuracy of surgeons at various training levels in identifying pedicle violations.
  • To determine if probing the pedicle tract is a reliable method for detecting breaches.

Main Methods:

  • 108 thoracic pedicle screw tracts were prepared in cadaveric vertebrae.
  • Deliberate pedicle violations were created in 65% of tracts (anterior, medial, or lateral wall).

Related Experiment Videos

  • Four surgeons of varying experience levels probed tracts three times to identify breaches and locations, with Cohen kappa used for analysis.

    • Main Results:

    • Accuracy and intraobserver agreement varied significantly with surgeon training level.
    • The most experienced surgeon demonstrated the highest accuracy, while the least experienced showed the lowest.
    • Interobserver agreement among the four surgeons was low, despite good intraobserver agreement among the three most senior surgeons.

    Conclusions:

    • Accurate detection of pedicle tract violations depends on surgeon training and experience.
    • Probing the thoracic pedicle tract is a skill that improves with practice and repetition.
    • Enhanced surgeon training may be necessary to improve the detection of pedicle violations during screw placement.