“…12,14,36,40 A decrease in the diameter of the lumen of spinal vessels, due to traction, substantially reduced the total spinal blood flow, causing local ischemic insult. 6,12,14,36,40 If detethering of the cord is performed within 2-8 weeks of the initial insult, blood flow and spinal evoked potentials may return to normal. Longer delays may result in irreversible changes.…”