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[Navigation assisted by image conversion. An experimental study on pelvic screw fixation].

U Stöckle1, B König, R Hofstetter

  • 1Unfall- und Wiederherstellungschirurgie, Humboldt Universität zu Berlin, Charité, Campus Virchow Klinikum, Augustenburgerplatz 1, 13353 Berlin. ulrich.stoeckle@charite.de

Der Unfallchirurg
|April 4, 2001
PubMed
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This study evaluated a new fluoroscopy-based navigation system for percutaneous pelvic screw fixation. The system demonstrated high accuracy and efficiency, with an average fluoroscopy time of 6 seconds per screw.

Area of Science:

  • Orthopedic surgery
  • Medical imaging
  • Surgical navigation

Background:

  • Percutaneous pelvic screw fixation is a critical procedure.
  • Accurate screw placement is essential for successful outcomes.
  • Minimizing fluoroscopy time is desirable to reduce radiation exposure.

Purpose of the Study:

  • To evaluate a novel fluoroscopy-based navigation system for percutaneous pelvic screw fixation.
  • To assess the precision and efficiency of the navigation system.
  • To define optimal C-arm projections for standardized screw placements.

Main Methods:

  • An experimental trial was conducted using a standard C-arm and a Medivision navigation system.
  • Five standardized screw positions in the pelvis were targeted.

Related Experiment Videos

  • Three to four C-arm projections (inlet/outlet, iliac/obturator views) were defined for each screw position.
  • Sixty screws were inserted into six artificial pelves to evaluate precision and fluoroscopy time.

    • Main Results:

    • The average fluoroscopy time was 6 seconds per screw.
    • 85% (51 out of 60) of screws were inserted correctly.
    • Minor deviations without cortical perforation occurred in five cases.
    • Cortical perforation occurred in four cases.

    Conclusions:

    • The tested fluoroscopy-based navigation system is precise and efficient for percutaneous pelvic screw fixation.
    • Standardized C-arm projections facilitate accurate screw placement.
    • The system shows promise for improving surgical outcomes and reducing radiation exposure in pelvic surgery.