Spine
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This study is a retrospective review of the initial enrollment data from a prospective multicentered study of adult spinal deformity. ⋯ This study suggests that restoration of a more normal sagittal balance is the critical goal for any reconstructive spine surgery. The study suggests that magnitude of coronal deformity and extent of coronal correction are less critical parameters.
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Morphometric changes of the spinal cord and influence on spinal cord-evoked potentials and spinal cord blood flow and postoperative function of hind limbs were studied in various degrees of acute spinal column shortening in dogs. ⋯ Acute spinal column shortening can be characterized into 3 phases. Phase 1, safe range: occurred during shortening within one-third of the vertebral segment and is characterized by no deformity of the dural sac or the spinal cord. Phase 2, warning range: occurred during spinal shortening between one-third and two-thirds of the vertebral segment and is characterized by shrinking and buckling of the dural sac and no deformity of the spinal cord. Phase 3, dangerous range: occurred after shortening in excess of two-thirds of the vertebral segment and is characterized by spinal cord deformity and compression by the buckled dura. Spinal shortening within the safe range increases spinal cord blood flow.
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Clinical Trial
Nitrous oxide with propofol reduces somatosensory-evoked potential amplitude in children and adolescents.
A repeat measures design. ⋯ In our study, nitrous oxide use during low-dose isoflurane anesthesia supplemented with titrated propofol infusion caused a significant reduction in cortically recorded somatosensory-evoked potentials that was comparable with the 50% decrease observed in adults.
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An anatomic study of the extraforaminal attachments of the lumbar spinal nerves was performed using human lumbar spinal columns. ⋯ Ligamentous connections exist between lumbar extraforaminal spinal nerves and nearby structures.
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Multicenter Study
Validity of the Spanish version of the Scoliosis Research Society-22 (SRS-22) Patient Questionnaire.
A cross-sectional multicenter study was performed to validate the Spanish version of the Scoliosis Research Society-22 (SRS-22) Patient Questionnaire. ⋯ The Spanish version of the SRS-22 is valid. It has a factorial structure similar to that of the original questionnaire. Moreover, it relates to known severity characteristics of the disease, distinguishes among scoliosis patient groups, and shows concordant values with another valid instrument for measuring self-perceived health.