Regional spinal card blood flow in rat with chronic spinal cord compression. The effect of laminectomy.

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The study compared two groups of rata one group of rats with chronic spinal card compression at C5-6 level and another group without spinal card compression. At the time of sacrifice three months after initial surgery, comparison of the body weight of the rats in the two groups did not exhibit statistically significant difference at the 5 % level. The weight of the spinal cord segments C3-4, C5-6, and C7-Th1 were compared. The compressed spinal cord (C5-6) weighed less than the counterpart in non-spinal-cord compression-rats, but the difference did not reach statistic significance at the 5 % level.The regional spinal cord blood flow at the C5-6 level was lower than the spinal cord blood flow at C3-4 level in chronically spinal-cord-compressed rat, were as the difference was not observed in rats without spinal cord compression. The comparison of the regional spinal card blood flow at C5-6 level between chronically spinal-cord-compressed rats and no compression rats did not show statistically significant difference.The ratio of regional spinal read blood flow at the C5-6 level to C3-4 level was determined for each rat There was a statistically significant difference at the 5 %level between the spinal-cord-compressed rats and non-compressed rats in the ratio of spinal blood flow C3-4 to C5-6.The effect of laminectomy on the spinal cord blood flow is to be determined in the fixture.The finding of this study showed decreased spinal cord blood flow in the compressed portion of the chronically compressed spinal ord. The significance of this finding is that this point to the possibility of the systemic conditions that may affect spinal and circulation affecting the outcome of spondylotic myelopathy, and there may be pharmacological treatment for the illness by improvement of spinal cord blood flow.