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A patient with severe multi-level spinal stenosis is scheduled to undergo decompression and fusion from T12-L4. Both pedicle screw length and diameter are measured pre-operatively. Which of the following pedicles would be templated for the smallest diameter screw?
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Pedicle screws are often used for spine stabilization procedures in both elective and trauma situations. Understanding of pedicle anatomy is essential to safe and effective screw placement. Ebraheim et al in their studies investigated pedicle dimensions of thoracic and lumbar spine, including linear and angular measurements, as well as the average distance from the projection point of the lumbar pedicle axis to the midline of the transverse process. The smallest pedicle diameter was most consistently found at the L1 level. The information from their studies can be helpful during pre operative templating and operative placement of screws into lumbar and thoracic pedicles.
Ebraheim NA, Rollins JR, Xu R, Yeasting RA
Spine. 1996 Jun;21(11):1296-300. PMID: 8725919 (Link to Abstract)
Ebraheim NA, Xu R, Ahmad M, Yeasting RA
Spine. 1997 Feb;22(3):233-8. PMID: 9051883 (Link to Abstract)
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