Spine
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Comparative Study
Transpedicular screw placement: image-guided versus lateral-view fluoroscopy: in vitro simulation.
In vitro evaluation of monitoring screw placement using an image-guided system compared with the routine use of an image intensifier. ⋯ In vitro computer-aided pedicle screw insertion is more accurate than lateral-view fluoroscopy in the thoracic spine. The main disadvantage is the time consumption compared with that required by lateral-view fluoroscopy. The total time of the surgical operation should be decreased with the future development of these techniques.
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Case report and literature review of cervical flexion myelopathies. ⋯ Prolonged extreme neck flexion, in association with profound muscular relaxation, can produce a severe myelopathy that is at least partly related to compromise of the spinal cord's microcirculation.