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A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique
Published on: January 6, 2023
Kirschner wire placement in scaphoid bones using intraoperative CT-guided stereotaxy
Christian Niederwanger1, Gerlig Widmann, Martin Knoflach
1Section of Microinvasive Therapy, Department of Radiology, Innsbruck Medical University, Innsbruck, Austria.
Summary
Computed tomography (CT)-guided stereotactic Kirschner (K)-wire placement in scaphoid bones is highly accurate. This technique shows potential for guiding minimally invasive osteosynthesis of scaphoid fractures.
Area of Science:
- Orthopedic surgery
- Medical imaging
- Surgical navigation
Background:
- Minimally invasive osteosynthesis of scaphoid fractures may reduce non-union risk and illness duration.
- Evaluating CT-guided stereotactic K-wire positioning for scaphoid fractures is crucial.
Purpose of the Study:
- To analyze the technical feasibility of CT-guided stereotactic K-wire positioning in the scaphoid.
- To assess the targeting accuracy of this minimally invasive technique.
Main Methods:
- Nineteen cadaveric upper extremities underwent percutaneous K-wire placement.
- 3D navigation and stereotactic targeting were used for K-wire placement based on CT data.
- Target positioning errors were evaluated by CT fusion.
Main Results:
- K-wire placement demonstrated mean lateral targeting errors of 0.9 ± 0.5 mm at entry and 1.2 ± 0.7 mm at the tip.
- The mean angular error was 1.3° ± 1.1°.
- Procedure duration ranged from 19 to 23 minutes.
Conclusions:
- CT-guided stereotactic K-wire placement in scaphoid bones is highly accurate.
- This technique offers a precise method for guiding minimally invasive screw-osteosynthesis of scaphoid fractures.
