Spine
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An experimental study on patients undergoing posterior lumbar spine surgery. ⋯ External compression and muscle strain from retractor blades during surgery increased intramuscular pressure in the paravertebral muscles to levels that, according to other studies, induce ischemia in the muscles.
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The authors retrospectively reviewed the relation between the location of disc herniation and pre- and postoperative changes in sciatic scoliotic list in 40 patients with surgically confirmed lumbar disc herniation who had sciatic scoliotic list with postoperative recovery. Clinical factors associated with scoliosis also were included. ⋯ These results suggest that sciatic scoliotic list is not a predictive factor of the anatomic location of disc herniation; rather, it is only suggestive of the side of disc herniation. The location of disc herniation may aide in the preoperative estimation of the recovery of the scoliosis.