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Related Experiment Video

Updated: Mar 30, 2026

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A novel electromagnetic navigation tool for acetabular surgery.

Wolfgang Lehmann1, Johannes M Rueger1, Jakob Nuechtern1

  • 1Department of Trauma, Hand and Reconstructive Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany.

Injury
|November 7, 2015
PubMed
Summary
This summary is machine-generated.

A novel electromagnetic navigation system enables accurate screw placement in acetabular fractures without fluoroscopy. This technology proves feasible for navigating challenging narrow bony corridors during surgery.

Keywords:
AcetabulumElectromagneticNavigationPelvis FracturesScrew-Osteosynthesis

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Area of Science:

  • Orthopedic surgery
  • Medical device technology
  • Surgical navigation

Background:

  • Acetabular fracture surgery presents challenges in screw placement within narrow bony corridors.
  • Fluoroscopy-assisted screw insertion is standard but involves radiation exposure.

Purpose of the Study:

  • To assess the feasibility, accuracy, and operative time of a new electromagnetic navigation system for screw insertion in acetabular corridors.

Main Methods:

  • A cadaver study involving 24 electromagnetically navigated screw insertions on 8 acetabula.
  • Placement of Quadrilateral Surface Screws (QSS), Infra-Acetabular Screws (IAS), and Posterior Column Screws (PCS) without fluoroscopy.
  • Postoperative CT scans analyzed screw placement accuracy; operative time was recorded.

Main Results:

  • Successful screw placement achieved in 91.7% (22/24) of cases.
  • Mean total operative time for three screws was 576.6 seconds.
  • Complications (3/3) occurred during IAS placement due to narrow corridors; QSS (50mm), IAS (85mm), PCS (120mm) lengths noted.

Conclusions:

  • The electromagnetic navigation system demonstrated feasibility for accurate screw placement in defined narrow acetabular corridors.
  • This technology allows for screw insertion without fluoroscopy, potentially reducing radiation exposure.