Accuracy of screw fixation using the O-arm® and StealthStation® navigation system for unstable pelvic ring fractures

  • Jun TakebaEmail author
  • Kensuke Umakoshi
  • Satoshi Kikuchi
  • Hironori Matsumoto
  • Suguru Annen
  • Naoki Moriyama
  • Yuki Nakabayashi
  • Norio Sato
  • Mayuki Aibiki
Original Article • PELVIS - TRAUMA



Screw fixation for unstable pelvic ring fractures is generally performed using the C-arm. However, some studies reported erroneous piercing with screws, nerve injuries, and vessel injuries. Recent studies have reported the efficacy of screw fixations using navigation systems. The purpose of this retrospective study was to investigate the accuracy of screw fixation using the O-arm® imaging system and StealthStation® navigation system for unstable pelvic ring fractures.


The participants were 10 patients with unstable pelvic ring fractures, who underwent screw fixations using the O-arm StealthStation navigation system (nine cases with iliosacral screw and one case with lateral compression screw). We investigated operation duration, bleeding during operation, the presence of complications during operation, and the presence of cortical bone perforation by the screws based on postoperative CT scan images. We also measured the difference in screw tip positions between intraoperative navigation screen shot images and postoperative CT scan images.


The average operation duration was 71 min, average bleeding was 12 ml, and there were no nerve or vessel injuries during the operation. There was no cortical bone perforation by the screws. The average difference between intraoperative navigation images and postoperative CT images was 2.5 ± 0.9 mm, for all 18 screws used in this study.


Our results suggest that the O-arm StealthStation navigation system provides accurate screw fixation for unstable pelvic ring fractures.


Pelvic ring fracture Osteosynthesis Screw Navigation O-arm 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical standards

This study was approved by our institution’s scientific research board and conducted in accordance with the World Medical Association Declaration of Helsinki Standard of 1964, as revised in 1983 and 2000. The patient was informed about the study in detail prior to obtaining written informed consent for enrollment, including consent for CT imaging.


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Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2017

Authors and Affiliations

  • Jun Takeba
    • 1
    Email author
  • Kensuke Umakoshi
    • 1
  • Satoshi Kikuchi
    • 2
  • Hironori Matsumoto
    • 1
  • Suguru Annen
    • 2
  • Naoki Moriyama
    • 2
  • Yuki Nakabayashi
    • 1
  • Norio Sato
    • 2
  • Mayuki Aibiki
    • 1
  1. 1.Department of Emergency Medicine and Critical CareEhime UniversityShitsukawa, ToonJapan
  2. 2.Department of Aeromedical Services for Emergency and Trauma CareEhime UniversityShitsukawa, ToonJapan

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