article Closed Access EN 1998-09-01

Percutaneous Iliosacral Screw Placement Using Image Guided Techniques

Jérôme Tonetti, Lionel Carrat, Stephane Lavall�e, L. Pittet, Philippe Merloz, J. P. Chirossel

Clinical Orthopaedics and Related Research, Vol. 354, Issue 354, pp. 103–110 (1998)

Université Joseph Fourier, Institut pour l'avancée des biosciences

DOI: 10.1097/00003086-199809000-00013 PMID: 9755769

Abstract

A computer assisted technique of iliosacral screw placement that is applicable to unstable pelvic ring fractures is proposed. The goals are to operate noninvasively with a percutaneous procedure to decrease the complications of surgical exposure and to provide greater accuracy in locating the close neurovascular structures. Preoperative computed tomographic images of the pelvis are provided and a computed tomography three-dimensional model is built. In this model, the optimal trajectories for the drilling are planned. An ultrasound based registration is performed intraoperatively. This registration is the most original part of this work. After performing the passive drilling guidance step, the surgeon places the screws. The accuracy of the ultrasound based registration is checked by comparison with a standard surface based registration at the end of the test experiment. Each screw position is verified by a computed tomographic examination. Four human anatomic specimen pelves were tested with three screw insertions for each pelvis (12 screws). All of the screws were considered to be placed correctly. The method is safe and encourages the start of clinical application.