Iliac screw fixation using computer-assisted computer tomographic image guidance: technical note.

Abstract:

BACKGROUND:Iliac screw fixation is a powerful tool used by spine surgeons to achieve fusion across the lumbosacral junction for a number of indications, including deformity, tumor, and pseudarthrosis. Complications associated with screw placement are related to blind trajectory selection and excessive soft tissue dissection. OBJECTIVE:To describe the technique of iliac screw fixation using computed tomographic (CT)-based image guidance. METHODS:Intraoperative registration and verification of anatomic landmarks are performed with the use of a preoperatively acquired CT of the lumbosacral spine. With the navigation probe, the ideal starting point for screw placement is selected while visualizing the intended trajectory and target on a computer screen. Once the starting point is selected and marked with a burr, a drill guide is docked within this point and the navigation probe re-inserted, confirming the trajectory. The probe is then removed and the high-speed drill reinserted within the drill guide. Drilling is performed to a depth measured on the computer screen and a screw is placed. RESULTS:Confirmation of accurate placement of iliac screws can be performed with standard radiographs. CONCLUSION:CT-guided navigation allows for 3-dimensional visualization of the pelvis and minimizes complications associated with soft-tissue dissection and breach of the ilium during screw placement.

journal_name

Neurosurgery

journal_title

Neurosurgery

authors

Shin JH,Hoh DJ,Kalfas IH

doi

10.1227/NEU.0b013e318230517a

subject

Has Abstract

pub_date

2012-03-01 00:00:00

pages

16-20; discussion 20

issue

1 Suppl Operative

eissn

0148-396X

issn

1524-4040

journal_volume

70

pub_type

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